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341.
Krishna P. Katuri Shafeer Kalathil Ala'a Ragab Bin Bian Manal F. Alqahtani Deepak Pant Pascal E. Saikaly 《Advanced materials (Deerfield Beach, Fla.)》2018,30(26)
Dual‐function electrocatalytic and macroporous hollow‐fiber cathodes are recently proposed as promising advanced material for maximizing the conversion of waste streams such as wastewater and waste CO2 to valuable resources (e.g., clean freshwater, energy, value‐added chemicals) in microbial electrochemical systems. The first part of this progress report reviews recent developments in this type of cathode architecture for the simultaneous recovery of clean freshwater and energy from wastewater. Critical insights are provided on suitable materials for fabricating these cathodes, as well as addressing some challenges in the fabrication process with proposed strategies to overcome them. The second and complementary part of the progress report highlights how the unique features of this cathode architecture can solve one of the intrinsic bottlenecks (gas–liquid mass transfer limitation) in the application of microbial electrochemical systems for CO2 reduction to value‐added products. Strategies to further improve the availability of CO2 to microbial catalysts on the cathode are proposed. The importance of understanding microbe–cathode interactions, as well as electron transfer mechanisms at the cathode–cell and cell–cell interface to better design dual‐function macroporous hollow‐fiber cathodes, is critically discussed with insights on how the choice of material is important in facilitating direct electron transfer versus mediated electron transfer. 相似文献
342.
Macarena Cataldo‐Hernández Mikaela Stewart Arman Bonakdarpour Madjid Mohseni David P. Wilkinson 《加拿大化工杂志》2018,96(5):1045-1052
343.
聚氨酯泡沫固定化黄孢原毛平革菌限碳培养能有效地生产乙二醛氧化酶,乙二醛氧化酶的底物丙酮醛、乙二醛等不能诱导乙二醛氧化酶的合成,藜芦醇、苯甲醇能诱导乙二醛氧化酶的合成。Mn2+浓度为2.96×10-5mol/L时活力最高,Fe2+、Cu2+对产量影响不大,空气中能合成乙二醛氧化酶,但效果不如通氧。在较优的培养条件下,乙二醛氧化酶活力为29.1U/L。 相似文献
344.
槽外法苯甲酸催化甲苯电合成苯甲醛 总被引：1，自引：0，他引：1
以苯甲酸作相转移催化剂,Mn3+/Mn2+为媒介,甲苯为原料,采用槽外法电合成苯甲醛。利用正交实验研究了H2SO4浓度、反应温度和苯甲酸用量对苯甲醛生成速率和产率的影响。结果表明,当每升甲苯含8 g苯甲酸、水相H2SO4浓度为51.6%和反应温度85℃时,苯甲醛的收率大于93%。 相似文献
345.
硝基苯电解合成对氨基苯酚的工业化试验 总被引：6，自引：0，他引：6
采用1000L阴极转动分隔式电解槽,研究了硝基苯电解合成对氨基苯酚(PAP)的工业化放大过程。研究表明,转动阴极电解槽的工作特性与阴极转速、电流强度、温度、隔膜材料等因素有关。当电解电流为3000A时,硝基苯的平均转化率为91.0%,PAP平均收率为67.6%,直流电单耗为7.34 kWh(kg PAP)-1。电解合成的PAP纯度在97%以上,熔点为187.2~188.4C。 相似文献
346.
347.
利用红外光谱（IR）研究了槽外合成对甲氧基苯甲醛和对溴苯甲醛的反应机理，结果证明：在Ce^4＋与对取代甲苯的氧化反应中，苯环上甲基被Ce^4＋氧化的难易受苯环上对位取代基的影响。对甲基苯甲醚先氧化成对甲氧基苯甲醇，再氧化成对甲氧基苯甲醛并最终氧化成对甲氧基苯甲酸，第一个电子传递步骤为控制步骤：对溴甲苯先氧化成对溴苯甲醇，再氧化成对溴苯甲醛，后者为控制步骤。 相似文献
348.
介绍了一种以乙二醛代替毒害性较大的甲醛与聚乙烯醇进行缩醛反应,并利用聚合反应,且配以优质填料制得了环保型纸管用胶粘剂.试验表明,该胶粘剂具有成本低、粘接强度高、干燥速度快等特点,完全可以满足高速纸管包装的要求. 相似文献
349.
Haisheng Gong Zhichao Gong Jingjing Liu Gonglan Ye Huilong Fei 《Advanced functional materials》2024,34(25):2316438
Atomic metal-nitrogen-carbon catalysts (M-N-Cs) are promising electrocatalysts for the two-electron oxygen reduction reaction (2e− ORR) for the green production of H2O2. However, the conventional synthetic methods of M-N-Cs typically suffer from prolonged possessing time and high energy consumption. Herein, a flash light irradiation-assisted transient pyrolysis strategy is reported for the rapid and facile synthesis of a Co-N-C catalyst consisting of atomic Co-N4 sites supported on graphene. The resultant Co-N-C is highly active and selective as an electrocatalyst for the 2e− ORR, with a H2O2 selectivity up to 94.2%, high mass activity of 113.9 A g−1, high turnover frequency of 34.8 s−1, and an average H2O2 production rate of 12.1 mol g−1 h−1 with an accumulated H2O2 concentration up to 15.2 mmol L−1 when evaluated with a three-phase flow cell setup. Additionally, this synthetic strategy can be readily expanded to prepare other types of M-N-Cs (M = Fe, Ni, Cu, and noble metal Ir) with similar M-N4 configurations by simply changing the metal precursors, demonstrating the generality of this method. The rapid and general flash-assisted synthetic strategy for M-N-Cs can provide a readily accessible material library and platform for investigating their catalytic properties in different energy conversion processes. 相似文献
350.
Mingyang Deng Dingsheng Wang Yadong Li 《Advanced materials (Deerfield Beach, Fla.)》2024,36(24):2314340
Hydrogen peroxide (H2O2) as a green oxidizing agent is widely used in various fields. Electrosynthesis of H2O2 has gradually become a hotspot due to its convenient and environment-friendly features. Single-atom-site catalysts (SASCs) with uniform active sites are the ideal catalysts for the in-depth study of the reaction mechanism and structure-performance relationship. In this review, the outstanding achievements of SASCs in the electrosynthesis of H2O2 through 2e− oxygen reduction reaction (ORR) and 2e− water oxygen reaction (WOR) in recent years, are summarized. First, the elementary steps of the two pathways and the roles of key intermediates (*OOH and *OH) in the reactions are systematically discussed. Next, the influence of the size effect, electronic structure regulation, the support/interfacial effect, the optimization of coordination microenvironments, and the SASCs-derived catalysts applied in 2e− ORR are systematically analyzed. Besides, the developments of SASCs in 2e− WOR are also overviewed. Finally, the research progress of H2O2 electrosynthesis on SASCs is concluded, and an outlook on the rational design of SASCs is presented in conjunction with the design strategies and characterization techniques. 相似文献