Highly dispersed platinum on LaNi nanoparticles/nanoporous carbon for highly efficient electrocatalyic hydrogen evolution |
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| Affiliation: | 1. Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, College of Chemistry and Chemical Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiang Xi, China;2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;3. National Engineering Laboratory for Green Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China |
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| Abstract: | Herein, we provide a two-step method to synthetize a cost-effective Pt1.5La1.5Ni12/NPC (NPC = nanoporous carbon) multimetallic electrocatalyst with a novel nanostructure of ultralow Pt decorated LaNi alloy nanoparticles for the hydrogen evolution reaction-HER in 1.0 M aqueous potassium hydroxide (KOH) solution. The catalytic performance of Pt1.5La1.5Ni12/NPC for the HER outperforms than Pt2La1Ni12/NPC, Pt1La2Ni12/NPC, Pt1.5La13.5/NPC, Pt1.5Ni13.5/NPC, La3Ni12/NPC and commercial Pt/C, and Pt1.5La1.5Ni12/NPC requires ultralow overpotential of 20 mV@10 mA cm?2, 132 mV@100 mA cm?2. It is due to the synergy (electron) effect among Pt-, La- and Ni-related species (electron from Pt to La and Ni), thus changing the electronic structure of the Pt-, Ni- and La-related species. The incorporation of La and Ni could facilitate the formation of OHads and Hads by water dissociation and weaken the bonding strength of Pt-Hads. The Pt1.5La1.5Ni12/NPC catalyst also shows outstanding stability during the HER process. |
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| Keywords: | Multimetallic nanocatalyst Hydrogen evolution reaction Alkaline La Synergy effect |
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