过电位
分解水
异质结
材料科学
析氧
电催化剂
法拉第效率
贵金属
催化作用
化学工程
电化学
电解质
无机化学
电极
金属
化学
光电子学
光催化
冶金
物理化学
生物化学
工程类
作者
Guoliang Tian,Xiaolei Liu,Shaoxu Song,Qianqian Zhang,Zeyan Wang,Yuanyuan Liu,Zhaoke Zheng,Hefeng Cheng,Ying Dai,Xianglin Zhu,Peng Wang
标识
DOI:10.1002/chem.202301478
摘要
Abstract Electrochemical water splitting is an environmentally friendly and effective energy storage method. However, it is still a huge challenge to prepare non‐noble metal based electrocatalysts that possess high activity and long‐term durability to realize efficient water splitting. Here, we present a novel method of low‐temperature phosphating for preparing CoP/Co 3 O 4 heterojunction nanowires catalyst on titanium mesh (TM) substrate that can be used for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting. CoP/Co 3 O 4 @TM heterojunction showed an excellent catalytic performance and long‐term durability in 1.0 M KOH electrolyte. The overpotential of CoP/Co 3 O 4 @TM heterojunction was only 257 mV at 20 mA cm −2 during the OER process, and it could work stably more than 40 h at 1.52 V versus reversible hydrogen electrode (vs. RHE). During the HER process, the overpotential of CoP/Co 3 O 4 @TM heterojunction was only 98 mV at −10 mA cm −2 . More importantly, when used as anodic and cathodic electrocatalyst, they achieved 10 mA cm −2 at 1.59 V. The Faradaic efficiencies of OER and HER were 98.4 % and 99.4 %, respectively, outperforming Ru/Ir‐based noble metal electrocatalysts and other non‐noble metal electrocatalysts for overall water splitting.
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