摘要
Developing efficient and durable hydrogen evolution reaction(HER)electrocatalysts is one of the most important issues for the commercialization of seawater electrolysis,but it remains challenging.Here,we report a CeO_(2)-CoP nanoneedle array catalyst loaded on Ti mesh(CeO_(2)-CoP/TM)with workfunction-induced directional charge transport properties.The CeO_(2)-CoP/TM catalyst showed superior HER catalytic activity and stability,with over potentials of 41 and 60 mV to attain 10 mA cm^(-2),in 1 M KOH and 1 M KOH+seawater electrolyte,respectively.Experimental results and theoretical calculations reveal that the work function drives the charge transfer from CeO_(2)to CoP,which effectively balances the electronic density of CoP and CeO_(2),optimizes the d-band center,and accelerates the water activation kinetics,thus enhancing the HER activity.The solar-driven water electrolysis device displays a high and stable solar-to-hydrogen conversion efficiency of 19.6%.This study offers a work function-induced directional charge transport strategy to design efficient and durable catalysts for hydrogen production.
基金
financially supported by the National Natural Science Foundation of China(22369025)
the Yunnan Applied Basic Research Projects(202201AT070095,202301AT070098)
the Scientific Research Fund Project of Yunnan Provincial Department of Education(2023Y0262)
the Education Reform Research Project of Yunnan University(2021Z06)
the Yunnan Revitalization Talent Support Program。
作者简介
Corresponding authors:Anran Chen.E-mail addresses:anran@ynu.edu.cn;Corresponding authors:Hua Zhang.E-mail addresses:zhanghua1226@mail.ynu.edu.cn
