纳米针
材料科学
氧气
析氧
催化作用
分解水
化学工程
化学物理
纳米技术
物理化学
纳米结构
物理
工程类
光催化
生物化学
有机化学
化学
电化学
电极
作者
Quanxin Guo,Yong‐Min Liang,Zhengrong Xu,Rui Liu
标识
DOI:10.1002/aenm.202403744
摘要
Abstract Interface engineering is an efficient strategy to create high‐performance electrocatalysts for water splitting. In the present work, CeO 2 @CoSe 2 nanoneedle on carbon cloth (CeO 2 @CoSe 2 /CC) demonstrates high efficiency for oxygen evolution reaction (OER) and water splitting. CeO 2 with abundant O vacancies facilitates the adsorption of OH − and boosts the reconstruction of CoSe 2 into CoOOH at lower potentials. The in situ generated active CeO 2 @CoOOH heterointerface upshifts the d‐band center of Co site, thereby decreasing the free energy of rate‐determining step (RDS) ( * O to * OOH) during the OER process. It delivers a low OER overpotential of 245 mV at 10 mA cm −2 . CeO 2 @CoSe 2 /CC is also found to be active for hydrogen evolution reaction (HER, 138 mV overpotential at 10 mA cm −2 ), profiting from CeO 2 ‐facilitated * H 2 O dissociation and * H adsorption on CoSe 2 . The overall water splitting is achieved over the CeO 2 @CoSe 2 /CC bifunctional electrode with a low electrolysis voltage of 1.54 V at 10 mA cm −2 . This work offers valuable insights into CeO 2 ‐assisted surface reconstruction as well as provides water electrolysis catalysts through interface engineering.
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