材料科学
分解水
过电位
磷化物
氧气
电解水
化学工程
电解
制氢
碱性水电解
电催化剂
析氧
氢氧化物
纳米棒
无机化学
金属
纳米技术
催化作用
物理化学
光催化
电解质
电化学
冶金
电极
化学
生物化学
有机化学
工程类
作者
Yue Liu,Yawen Hu,Xin Zhao,Sheng Zhu,Yulin Min,Qunjie Xu,Qiaoxia Li
标识
DOI:10.1021/acsami.3c19548
摘要
Designing a stable and highly active catalyst for hydrogen evolution and oxygen evolution reactions (HER/OER) is essential for the industrialization of hydrogen energy but remains a major challenge. This work reports a simple approach to fabricating coupled Co2P/Fe2P nanorod array catalyst for overall water decomposition, demonstrating the source of excellent activity in the catalytic process. Under alkaline conditions, Co2P/Fe2P heterostructures exhibit an overpotential of 96 and 220 mV for HER and OER, respectively, at 10 mA cm–2. For total water splitting, a low voltage of 1.56 V is required to provide a current density of 10 mA cm–2. And the catalyst exhibits long-term durability for 30 h at a high current density of 250 mA cm–2. The analysis of the results revealed that the presence of interfacial oxygen vacancies and the strong interaction between Co2P/Fe2P provided the catalyst with more electrochemically active sites and a faster charge transfer capability, which improved the hydrolysis dissociation process. Electrochemically active metal (oxygen) hydroxide phases were produced after OER stability testing. The results of this study prove its great potential in practical industrial electrolysis and provide a reasonable and feasible strategy for the design of nonprecious metal phosphide electrocatalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI