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1.
《International Journal of Hydrogen Energy》2022,47(38):16921-16932
Water splitting is a promising approach for storing intermittent renewable energies, such as sunlight in the clean chemical bonds as a hydrogen fuel. Two water-soluble octahedral cobalt (III) complexes, [Co(bpb)(OAc)(H2O)], 1, (bpb2? = N,N′-bis[(2-pyridine carboxamide)-1,2-benzene] dianion) and [Co(cbpb)(OAc)(H2O)], 2, (cbpb2? = N,N′-bis[(2-pyridine carboxamide)-4-chloro-1,2-benzene] dianion) were synthesised and characterised by CHN elemental analysis, UV–Vis, FT-IR and single-crystal X-ray diffraction techniques. The two carboxamide ligands had been prepared in the ionic liquid TBAB as an environmentally benign reaction medium. The electrocatalytic water splitting activity of 1 and 2 showed that both complexes are highly active for the water splitting in aqueous solutions. Turn Over Frequency (TOF) values were, for 1 and 2 respectively, 527 and 490 mol of hydrogen in each mole of catalyst per hour at an overpotential of 738 mV (pH = 7.0). Such a performance can be ascribed to the flat ligands, the electroactivity of the metal centre and carboxamide ligands and the ability of losing the axial ligands around the metal-ion centre during the reduction process which provide different reduction pathways for an HER process. 相似文献
2.
《International Journal of Hydrogen Energy》2023,48(29):10891-10902
Two cobalt complexes [Co(L1)2](ClO4)2⋅4CH3CN (1) and [Co(L2)2](ClO4)2⋅2CH3CN⋅0.5H2O (2) of the new click-derived bistriazolylpyridines 2,6-bis(1-(pyridin-2-yl)-1H-1,2,3-triazol-4-yl)isonicotinate methyl ester (L1) and 2,6-bis-(1-methoxycarbonylmethyl-1H-1,2,3-triazol-4-yl)isonicotinate methyl ester (L2) were synthesized and characterized. The electrocatalytic hydrogen evolution reaction (HER) mediated by complexes 1 and 2 was studied in CH3CN in the presence of acetic acid. Both complexes catalyzed HER with low overpotentials and high Faradaic efficiencies (370 mV and 93% for 1, 300 mV and 95% for 2). The distal substituents on the triazolyl moiety of the bistriazolylpyridines have apparent impacts on the redox and catalytic properties of 1 and 2. The catalytic behaviors were further studied using spectroelectrochemistry and the reductant cobaltocene. It was found that the reduction of the bistriazolylpyridines was necessary for the catalytic activity. Plausible pathways were proposed for the HER mediated by 1 and 2. This work provided some hints for the preparation of HER catalysts based on the redox-active triazolylpyridine ligands. 相似文献
3.
《International Journal of Hydrogen Energy》2022,47(55):23175-23190
The new copper(II) complexes [Cu(μ-1κO:2κONN′-HL1)(μ-1κO:2κO′-NO3)]2.[Cu(μ-1κO:2κONN′-HL1)(CH3OH)]2(NO3)2 (1) and [Cu(κONN′-HL2)(μ-1κOO’:2κO′-NO3)]n (2), derived from the new pro-ligands H2L1 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-5-methylphenol and H2L2 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-4-nitrophenol, were synthesized and characterized by elemental analysis, FT-IR, ESI-MS, and their structural features were unveiled by single-crystal X-ray diffraction analysis. This discloses a dimeric structure for 1 and a polymeric infinite 1D metal-organic chain for 2. The complexes were evaluated as catalysts for the oxidation of toluene, a volatile organic compound (VOC), and for oxygen reduction and water splitting reactions. 1 exhibits a higher activity for the peroxidative conversion of toluene to oxygenated products (total yields up to 38%), whereas 2 demonstrates a superior performance for electrochemical energy conversion applications, i.e., for oxygen reduction (ORR), oxygen evolution (OER) and hydrogen evolution (HER) reactions in an alkaline medium in terms of higher ORR current densities, lower Tafel slope (73 mV dec?1) and higher number of electrons exchanged (3.9), comparable to that of commercial Pt/C. Complex 2 also shows a better performance with lower onset potential and higher current densities for both OER and HER when studied as electrocatalyst for water splitting. 相似文献
4.
《International Journal of Hydrogen Energy》2023,48(38):14378-14390
Under ultrasonic irradiation, the porous Tb3Fe5O12 (TFO) and Nickel Aluminum layer double hydroxide (NiAl-LDH) were synthesized by investigation the effect of sonication time. Synthesis of TFO was conducted in the presence of tetradentate Schiff-base ligand H2salophen, [N,N′-bis(salicylidene)-1,2-phenylenediamine] as complexing agent to size controlling and further growth prevention of crystals. The resultant nanocomposites of TFO/NiAl-LDH used as novel active compounds for applying in hydrogen storage strategies. Comprehensively, the hydrogen capacitance after 15 cycles was displayed on the pure NiAl-LDH and TFO materials about 115 and 334 mAhg−1 respectively. It demanded the maximum capacitance for Tb3Fe5O12/NiAl-LDH nanocomposites was 451 mAhg−1, which was higher than the initial NiAl-LDH structure. It was exposed from the spillover effect that; the endorsed electrochemical hydrogen storage (EHS) performance is ascribed to the reaction of the redox pair of Fe3+/Fe2+ at the active sites throughout the EHS procedure. This work delivers a novel plan and potential sorption electrode materials to progress the intrinsic action of layered compounds. 相似文献
5.
《International Journal of Hydrogen Energy》2019,44(10):4543-4552
An electrocatalyst based on a unique three-dimensional (3D) N-doped porous carbon sheet networks embedded with CoP2 nanoparticles (CoP2@3D-NPC) was synthesized by a facile pyrolysis process as well as an in-situ phosphatization method. The improved CoP2@3D-NPC hybrid materials show excellent electrocatalytic activity toward HER and OER. This material provides a low overpotential of 126 mV at 10 mA cm−2 in 0.5 M H2SO4 and 167 mV at 20 mA cm−2 in 1.0 M KOH for HER with a small Tafel slope value of 59 mV dec−1, respectively. Besides, it is also active for the OER under alkaline conditions. Such a prominent property of the CoP2@3D-NPC electrocatalyst could be attributed to its excellent electrical conductivity of 3D carbon substrate, strong synergistic effect between CoP2 nanoparticles and carbon nanosheet as well as extra active sites created by the N-doped structure. 相似文献
6.
Constantin Claudiu Văduva Nicolae VaszilcsinAndrea Kellenberger 《International Journal of Hydrogen Energy》2012
The catalytic effect of some aromatic amines towards hydrogen evolution reaction on copper in diluted sulfuric acid solution has been studied. Since amines facilitate the transport of protons from the solution bulk to the interface in the cathodic hydrogen evolution reaction, they are known as proton carriers. The catalytic effect of aniline, N-methylaniline, N-ethylaniline, N,N-dimethylaniline, N,N-diethylaniline, o-toluidine, m-toluidine and p-toluidine has been highlighted by linear sweep voltammetry. The kinetic parameters for the hydrogen evolution reaction (cathodic transfer coefficient 1-α and exchange current density io) in the presence of the studied aromatic amines were derived from the Tafel plots. It has been found that the catalytic effect of amines is active even at low concentration. Thus, in 0.5 mol L−1 H2SO4 solution the exchange current density increases by two orders of magnitude, from 2.01⋅10−5 A m−2 in the absence of aniline to 2.85⋅10−3 A m−2 in the presence of 10−4 mol L−1 aniline. The influence of amines concentration on the catalytic effect is described in detail for the case of m-toluidine. The results obtained by voltammetry have been compared with electrochemical impedance spectroscopy data. Furthermore, the kinetic parameters for the hydrogen evolution reaction have been determined as a function of temperature and amines concentration. 相似文献
7.
Increasing interest has been paid to the development of earth-abundant metal complexes as promising surrogates of noble-metal platinum and biological catalysts hydrogenases for catalyzing the hydrogen evolution reaction. In this study, we report on a molecular H2-evolving catalyst based on a linear trimeric thiolato complex of nickel Ni3(LN2S2)2 (LN2S2 = N,N′-dimethyl-N-N′-bis(2-mecaptoethyl)-ethylenediaminato). Electrochemical studies showed that the trinuclear nickel complex Ni3(LN2S2)2 can electrocatalyze hydrogen evolution from weakly acidic solutions with remarkable turnover frequencies (3495 s?1 at ?1.98 V and 715 s?1 at ?1.58 V vs SCE). An efficient noble-metal-free homogeneous photocatalytic system for hydrogen generation from water working under visible light irradiation was further constructed by using the target nickel complex as photocatalyst, fluorescein (Fl) as photosensitizer (PS), and triethylamine (TEA) as sacrificial electron donor. Our studies showed that Ni3(LN2S2)2 can be used in purely aqueous solution and gave a turnover number (TON, vs catalyst) for H2 evolution of 790, corresponding to a TOF 60 h?1. The results show that multinuclear nickel(II) complexes are a promising new direction for molecular catalysts for the electro- and photoreduction of protons. 相似文献
8.
Saeedeh Asadizadeh Mehdi Amirnasr Soria Meghdadi Farzaneh Fadaei Tirani Kurt Schenk 《International Journal of Hydrogen Energy》2018,43(10):4922-4931
A tetranuclear cobalt complex [Co4III(L′)6] was synthesized by the direct reaction of cobalt(II) acetate with a N2S2 Schiff base ligand H2L containing a disulfide bond under aerobic conditions {H2L = 2,2′-bis(2-hydroxynaphthyliminobenzyl)disulfide}. The X-ray crystal structure of [Co4III(L′)6] indicates reductive disulfide bond scission of H2L upon reaction with Co2+ to give [L′]2–. Furthermore, cobalt oxide nanoparticles of about 30 nm size were synthesized by thermal decomposition of [Co4III(L′)6] as a precursor. The Co3O4 nanoparticles were characterized by XRD, FE-SEM, TEM, and FT-IR spectroscopy. The electrocatalytic activity of the resulting oxide was examined in oxygen evolution reaction (OER) by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) in 1.0 mol L?1 KOH. The NPs displays efficient electrocatalytic activity for oxygen evolution reaction with a current density of 10.0 mA cm?2 at 1.65 V, good onset potential of 1.52 V vs. RHE and small Tafel slope of 44 mV dec?1. 相似文献
9.
Hengfei Zhang Die He Shufeng Niu Hong Qi 《International Journal of Hydrogen Energy》2021,46(33):17221-17230
1,2-bis(triethoxysilyl)ethane (BTESE)-derived membranes have proven thermal and hydrothermal stability and molecular sieving properties. However, BTESE-derived membranes still have low gas permselectivity due to their loose structure. Herein, we propose a novel strategy of co-polymerization using precursors of both BTESE and 1,2-bis(triethoxysilyl)methane (BTESM) to improve the gas permselectivity of BTESE-derived membranes. BTESM is introduced into BTESE network and the microstructure can be adjusted by different molar ratios of BTESE to BTESM. We find that, as the content of BTESM increase, H2 permeations of BTESE-BTESM membranes remain nearly constant, while the permeations of larger gases (CO2 and N2 etc.) exhibit a greatly decreased. The membrane with a molar ratio of BTESE:BTESM = 3:7 exhibits the highest H2/CO2 (11.3) and H2/N2 (26.8) permselectivity while having a relatively high H2 permeance (1.52 × 10?6 mol m2 s?1?Pa?1). Our findings may provide novel insights into preparation of co-polymerization organosilica membranes with excellent H2/CO2 and H2/N2 separation performance. 相似文献
10.
Tianhao Li Daomei Tang ChangMing Li 《International Journal of Hydrogen Energy》2017,42(34):21786-21792
Ionic liquid/carbon nanotubes (IL/CNTs) composite was applied as the precursor to prepare CNTs-supported cobalt phosphide via low-temperature phosphidation. CoP(MBMG)/CNTs, generated from N,N-bis(4-(methoxycarbonyl)benzyl)-N-methyl-d-glucaminium dibromodichlorocobaltate(II) (MBMG)2-CoCl2Br2), exhibits the best catalytic activity toward hydrogen evolution reaction with an onset overpotential of 55 mV, a Tafel slope of 58 mV dec?1, 95% Faradaic efficiency (FE), current densities of 10 and 20 mA cm?2 at overpotentials of 135 and 160 mV, and it can maintain the catalytic activity for at least 27 h. FT-IR, Raman spectroscopy, XPS and XRD were utilized to investigate the phosphidation process. All experimental results confirmed that anion from (MBMG)2-CoCl2Br2 can form CoP and glucaminium-based cation can become amorphous carbon after phosphidation to obtain the high HER activity of CoP(MBMG)/CNTs. 相似文献
11.
Ultrasmall Mo2C in N-doped carbon material from bimetallic ZnMo-MOF for efficient hydrogen evolution
Yuanyuan Guo Qi Huang Junyang Ding Li Zhong Ting-Ting Li Yue Hu Jinjie Qian Shaoming Huang 《International Journal of Hydrogen Energy》2021,46(2):2182-2190
The exploration and development of cost-effective and highly stable electrocatalysts with the highest possible energy efficiency remain a constant pursuit in the catalyst design and synthesis for electrocatalytic hydrogen evolution reaction (HER). In this work, a convenient approach is proposed to synthesize a type of ultrafine Mo2C nanoparticles in average sizes of 3–4 nm embedded in hierarchically porous N-doped carbon material calcined from bimetallic ZnMo-MI (MI = 2-methylimidazole) is obtained at 1000 °C, denoted as ZnMo-MI-1000. First of all, the crystalline hybrid metal-organic framework of ZnMo-MI is fabricated from zeolitic imidazolate framework of Zn-MI precursors via solvothermal reaction, in which the conversion from Zn-MI to ZnMo-MI occurs gradually over time. After calcination, the as-obtained ZnMo-MI-1000 sample shows a satisfying HER performance with the small overpotential of 83.0 mV in 0.5 M H2SO4 and 100.1 mV in 1.0 M KOH to reach a current density of 10 mA cm?2, which is attributed to ultrasmall Mo2C, Mo and N-doped graphitic carbon matrix. The multiporous network of ZnMo-MI-1000 can provide continuous mass transportation with a minimal diffusion resistance that produce effective electrocatalytic kinetics in both acidic and alkaline media, which is utilized as a highly active and durable nonprecious metal electrocatalyst for HER. 相似文献
12.
《International Journal of Hydrogen Energy》2020,45(43):23490-23503
Novel functionalized polysulfone with high local density of sulfonic acid groups, N,N-bis(sulfopropyl)aminyl-4-phenyl polysulfone or O,O′-bis(sulfopropyl)resorcinol-5-yl-4-phenyl polysulfone (PSF-X-C3H6SO3H, X = N or O) are synthesized. These polymers are synthesized by bromination of polysulfone followed by Suzuki cross-coupling reaction to graft the aminophenyl groups and the dimethoxyphenyl groups onto the polymeric backbone, followed by introduction of the sulfopropyl groups via sultone ring-opening reaction. In addition, the composite membrane of PSF-O-C3H6SO3H and PSF-N-C3H6SO3H is also synthesized for comparison. The maximum proton conductivity of composite PSF-O-C3H6SO3H and PSF-N-C3H6SO3H reaches 46.66 mS cm−1 at 95 °C and 90% RH, higher than PSF-O-C3H6SO3H (42.06 mS cm−1) and PSF-N-C3H6SO3H (38.76 mS cm−1). Meanwhile, the composite exhibits compromised water uptake and swelling ratio, and low methanol permeability. The excellent overall performance of the composite is attributed to phase-separation between the hydrophilic and the hydrophobic subphases, and the hydrogen-bonding network developed in the hydrophilic subphases. 相似文献
13.
Electrocatalytic hydrogen evolution of a cobalt A2B triaryl corrole complex containing –N=PPh3 group
《International Journal of Hydrogen Energy》2022,47(44):19062-19072
A new cobalt 5,15-bis(perfluorophenyl)-10-(4-N-(triphenylphosphoranylidene)-2,3,5,6-tetrafluorophenyl) corrole complex (Co-BPNC-PPh3) containing –N=PPh3 group has been prepared by Staudinger reaction and characterized by the single-crystal X-ray structure determination. The electrocatalytic hydrogen evolution reaction (HER) of Co-BPNC-PPh3 by using acetic acid (AcOH), trifluoroacetic acid (TFA) and p-toluenesulfonic acid (TsOH) as proton sources in N, N-dimethylformamide (DMF) solvent had been investigated. The turn-over frequency (TOF) value of Co-BPNC-PPh3 was observed 450 h?1 at an overpotential of 838 mV in neutral aqueous solution, showing excellent electrocatalytic HER activity. This Co-BPNC-PPh3 exhibited excellent durability and stability in the 5-hours electrolysis. Its activity is also better than cobalt 5, 10, 15-(tris-pentatfulorophenyl) corrole (Co-TPFC-PPh3), which may be ascribed to the –N=PPh3 proton relay effect in the electrocatalytic HER. 相似文献
14.
《International Journal of Hydrogen Energy》2022,47(8):5064-5073
Reasonable construction of heterostructure is of significance yet a great challenge towards efficient pH-universal catalysts for hydrogen evolution reaction (HER). Herein, a facial strategy coupling gas-phase nitridation with simultaneous heterogenization has been developed to synthesize heterostructure of one-dimensional (1D) Mo3N2 nanorod decorated with ultrathin nitrogen-doped carbon layer (Mo3N2@NC NR). Thereinto, the collaborative interface of Mo3N2 and NC is conducive to accomplish rapid electron transfer for reaction kinetics and weaken the Mo–Hads bond for boosting the intrinsic activity of catalysts. As expected, Mo3N2@NC NR delivers an excellent catalytic activity for HER with low overpotentials of 85, 129, and 162 mV to achieve a current density of 10 mA cm?2 in alkaline, acidic, and neutral electrolytes, respectively, and favorable long-term stability over a broad pH range. As for practical application in electrocatalytic water splitting (EWS) under alkaline, Mo3N2@NC NR || NiFe-LDH-based EWS also exhibits a low cell voltage of 1.55 V and favorable durability at a current density of 10 mA cm?2, even surpassing the Pt/C || RuO2-based EWS (1.60 V). Consequently, the proposed suitable methodology here may accelerate the development of Mo-based electrocatalysts in pH-universal non-noble metal materials for energy conversion. 相似文献
15.
《International Journal of Hydrogen Energy》2023,48(10):3901-3915
Regulating photogenerated charge carrier transfer kinetics in multi-component heterostructure by surface-interface design is of great significance for accelerating efficiently photocatalytic hydrogen evolution reaction. Herein, a novel binary CoSe2/CNNS composite is successfully fabricated by a successive high-temperature calcination method of g-C3N4 followed by in-situ hot injection process of CoSe2 for the first time. The optimal 7.5% CoSe2/CNNS heterostructure reaches moderate hydrogen production rate of 1386.8 μmol·g?1·h?1 and exhibits good mineralization efficiency for tetracycline hydrochloride (40.6%) within 120 min under light irradiation, respectively. The photogenerated charge migration behaviors, the generation process and function of various radical species (H2O2, ·OH and ·O2?) are detailedly analyzed. Moreover, photocatalytic hydrogen evolution reaction process and the intermediates and active species for tetracycline hydrochloride degradation can also be discussed. Such significantly enhanced photocatalytic activity can be resulting from good light trapping ability, rapid photocarriers transfer efficiency and accelerated H2O2 decomposition ability via a continuous two-electron/two-step reduction route. This work provides an effective strategy to control and understand the charge migration kinetics as well as to suppress H2O2 production during photocatalytic hydrogen evolution process. 相似文献
16.
Jinli Zhao Yong Ding Jie Wei Xiaoqiang Du Yongze Yu Ruixin Han 《International Journal of Hydrogen Energy》2014
A molecular Keggin polyoxometalate catalyst K7[CoIIICoII(H2O)W11O39](1) was successfully synthesized and efficiently catalyzed the hydrogen evolution. To the best of our knowledge, the molecular Keggin polyoxometalate catalyst 1 is the first reported polyoxometalate containing cobalt with efficient hydrogen production activity under the visible light irradiation. Under the optimal photocatalytic condition (photoirradiation at λ ≥ 420 nm, Eosin-Y as the photosensitizer, triethanolamine as the electron donor and Pt produced in situ photoreduction as co-catalyst), the turnover number (TON/based on catalyst) reached as high as 100; the initial quantum yield and the initial turnover frequency (TOF) at the first 10 min were 29% and 0.025 s−1, respectively. The hydrogen evolution average rate of 1 achieved 13,395 μmol h−1 g−1, as far as we are concerned, which is the highest among all the polyoxometalates photocatalytic systems reported so far. A possible mechanism of the hydrogen evolution reaction was proposed on the basis of steady-state fluorescence decay studies. 相似文献
17.
《International Journal of Hydrogen Energy》2019,44(49):27030-27038
A series of salts of the B12H122− anion has been prepared: a solvent-free (N2H5)2B12H12, its solvates – (N2H5)2B12H12·H2O, (N2H5)2B12H12·2(CH3CN), (N2H5)2B12H12·(CH3OH), and the salt of a protonated azine – [(CH3)2CNNHC(CH3)2]2B12H12. These compounds have been synthesized from the commercially available precursors via one- or two-step procedures and fully identified on the basis of single-crystal and powder X-ray diffraction. At room temperature (N2H5)2B12H12 crystallizes in C2/c space group, with a = 18.480(5) Å, b = 6.5344(19) Å, c = 13.106(4) Å and β = 131.911(16)o, V = 1177.8(7) Å3, Z = 4. While this compound nominally contains ca. 10.7 wt% of hydrogen, it thermally decomposes above 200 °C releasing mainly N2 and NH3, with H2 being only the minor gaseous product. Contrary to the recently reported case of hydrazinates of borohydrides, doping with 5 mol% of FeCl3 does not increase the relative amount of hydrogen significantly, however, it alters the ratio of N2 and NH3. 相似文献
18.
《International Journal of Hydrogen Energy》2023,48(20):7260-7272
Cu2CoSnS4, Cu2SnS3, Cu2CoS4, Co2SnS3, Cu2S, CoS2, and SnS2 were synthesized using a one-step solvent-free solid-phase approach. The surface structure, morphology, and composition were characterized using an X-ray diffractometer (XRD), Fourier-Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), and X-ray Photoelectron Spectroscopy (XPS). The characterizations reveal pure phase formation and porous morphology. Further, the Hydrogen evolution reaction was performed using Cu2CoSnS4, Cu2SnS3, Cu2CoS4, Co2SnS3, Cu2S, CoS2, and SnS2-based electrodes. Amid all electrocatalysts, Cu2CoSnS4 shows an excellent hydrogen evolution reaction with a low overpotential of ?192.1 mV at ?10 mA/cm2 in 0.5 M H2SO4. And higher current density. Cu2CoSnS4 also shows a lower Tafel slope of 98.6 mV/dec and charge transfer resistance than mono and bimetallic chalcogenide-based electrodes. The Cu2CoSnS4 exhibit very good stability for ~22 h at ?10 mA/cm2 current density in 0.5 M H2SO4. 相似文献
19.
《Journal of power sources》2002,112(1):76-84
Electrocatalytic effects associated with the reduction of thionyl chloride in a LiAlCl4–SOCl2 electrolyte solution containing Schiff base metal(II) (metal (M): Co, Ni, Cu and Mn) complexes are evaluated by determining the kinetic parameters for the reactions using cyclic voltammetry at a glassy carbon electrode. The charge-transfer process during the reduction of thionyl chloride is affected by the concentration of the catalyst. Catalytic effects are demonstrated from both a shift in the reduction potential for the thionyl chloride in a more positive direction and an increase in peak currents. The reduction of thionyl chloride is diffusion controlled. Catalytic effects are larger for thionyl chloride solutions containing M(II)(1,5-bis(salicylidene imino) pentane) (M(II)(SALPE)) rather than M(II)(1,3-bis(salicylidene imino) propane) (M(II)(SALPR)). Significant improvements in cell performance are found in terms of the both thermodynamics and kinetic parameters for the thionyl chloride reduction. An exchange rate constant, k0, of 1.89×10−8 cm s−1 is found at the bare electrode, while larger values of 2.79×10−8 to 2.09×10−6 cm s−1 are observed in the case of the catalyst-supported glassy carbon electrode. 相似文献
20.
《International Journal of Hydrogen Energy》2021,46(74):36781-36791
Developing lower-cost and higher-efficient photocatalysts is still a major challenge for the solar to hydrogen energy conversion by photocatalytic water splitting. Herein, P-doped Co9S8 (P–Co9S8) was synthesized by a hydrothermal process using low-cost RP as raw material, and then P–Co9S8 was employed to construct heterojunction with g-C3N4 via a mechanical-mixing method. Investigation shows that P–Co9S8 can not only improve the electrical conductivity and surface area of the composite, but also can lower the over-potential of H2 evolution, leading to an enhanced H2 evolution kinetics. The H2 evolution rate of resultant 25% P–Co9S8/g-C3N4 reached 4362 μmol g−1 h−1 under UV and visible light, being nearly 121.2 times higher than that of g-C3N4. The charge transfer between P–Co9S8 and g-C3N4 follows the Type-I route based on the photoelectrochemical analysis, leading to more electrons on the conduction band of P–Co9S8 to participate the H2 evolution processes. This work provides a new way for preparation of P-doped sulfides with potential applications in the field of photocatalysis. 相似文献