析氧
电催化剂
双功能
异质结
化学工程
纳米线
分解水
材料科学
电解
纳米技术
电子转移
光电子学
电极
化学
电解质
电化学
光化学
物理化学
光催化
催化作用
生物化学
工程类
作者
Lili Zhang,Yuanting Lei,Wenjing Xu,Dan Wang,Yafei Zhao,Wenxing Chen,Xu Xiang,Xinchang Pang,Bing Zhang,Huishan Shang
标识
DOI:10.1016/j.cej.2022.141119
摘要
Developing high-efficiency, low-cost, and durable bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is greatly desirable and challenging. Herein, a highly active and durable nitrogen-doped CoP coupled CeO2 nanowire heterostructure (N-CoP/CeO2) electrocatalyst is prepared on carbon cloth. The resultant N-CoP/CeO2 exhibits superb catalytic activities for OER and HER, featuring low overpotentials of 215 and 74 mV at 10 mA cm−2 in 1.0 M KOH. The N-CoP/CeO2 assembled water electrolyzer has super stability, which needs relatively low cell voltages of 1.52 [email protected] mA cm−2 over 42 days (≈95.9 % retention) and 1.80 [email protected] mA cm−2 over 21 days (≈94.4 % retention), outperforming most reported cost-effective electrocatalysts. Theoretical calculations reveal that the metallic heterostructure interfaces of N-CoP/CeO2 possess a fast electron transfer pathway, optimized adsorption/desorption process of reactive intermediates, and reduced reaction energetic barriers, thus enhancing the electrocatalytic activity. Additionally, the robust three-dimensional configuration and the oxygen vacancies-rich CeO2 component in N-CoP/CeO2 are regarded as significant contributors to improving stability and promoting long-term durability.
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