气候变化领域集成服务门户(CCPortal): Ethylene-glycol ligand environment facilitates highly efficient hydrogen evolution of Pt/CoP through proton concentration and hydrogen spillover

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DOI	10.1039/c9ee00752k
	Ethylene-glycol ligand environment facilitates highly efficient hydrogen evolution of Pt/CoP through proton concentration and hydrogen spillover
	Li J.; Liu H.-X.; Gou W.; Zhang M.; Xia Z.; Zhang S.; Chang C.-R.; Ma Y.; Qu Y.
发表日期	2019
ISSN	17545692
起始页码	2298
结束页码	2304
卷号	12 期号:7
英文摘要	The low catalytic kinetics of many non-precious electrocatalysts for hydrogen evolution reaction is often associated with their adverse hydrogen adsorption/desorption kinetics. Thus, improving their kinetics as well as understanding the mechanism is critically important. Herein, the strategy of utilizing unique ethylene glycol ligand environments was employed to circumvent the aforesaid kinetic limitations in the composites of Pt-loaded CoP linked by ethylene-glycol through proton concentration and hydrogen spillover. At a low Pt loading of 1.5 wt%, the catalytic performance was significantly improved with dramatically decreased Tafel slopes from 104.6 mV dec-1 of CoP to 42.5 mV dec-1. Control experiments and theoretical calculations revealed that ethylene-glycol concentrated hydrogen intermediates at Pt (>7.3 times), facilitated the hydrogen spillover from hydrogen-enriched Pt to hydrogen-deficient CoP and modulated the local electronic structures to afford thermo-neutral Pt/CoP interfacial sites, improving the catalytic kinetics ultimately. The composites with 1.5 wt% Pt loading delivered a low overpotential of 21 mV at 10 mA cm-2 as well as record high noble-metal utilization activity, outperforming commercial Pt/C and other hydrogen spillover electrocatalysts for HER. This strategy may provide insights for the design of electrocatalysts. © The Royal Society of Chemistry 2019.
英文关键词	Coefficient of performance; Electrocatalysts; Electrolysis; Electronic structure; Ethylene; Ethylene glycol; Hydrogen; Kinetics; Ligands; Platinum; Polyols; Reaction kinetics; Catalytic performance; Control experiments; Hydrogen adsorption; Hydrogen evolution reactions; Hydrogen spill overs; Local electronic structures; Proton concentrations; Theoretical calculations; Gas adsorption; catalysis; concentration (composition); ethylene; hydrogen; kinetics; ligand; liquid; performance assessment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189874
作者单位	School of Chemical Engineering and Technology, Center for Applied Chemical Research, Frontier Institute of Science and Technology, Xi'An Jiaotong University, Xi'an, 710049, China
推荐引用方式 GB/T 7714	Li J.,Liu H.-X.,Gou W.,et al. Ethylene-glycol ligand environment facilitates highly efficient hydrogen evolution of Pt/CoP through proton concentration and hydrogen spillover[J],2019,12(7).
APA	Li J..,Liu H.-X..,Gou W..,Zhang M..,Xia Z..,...&Qu Y..(2019).Ethylene-glycol ligand environment facilitates highly efficient hydrogen evolution of Pt/CoP through proton concentration and hydrogen spillover.Energy & Environmental Science,12(7).
MLA	Li J.,et al."Ethylene-glycol ligand environment facilitates highly efficient hydrogen evolution of Pt/CoP through proton concentration and hydrogen spillover".Energy & Environmental Science 12.7(2019).