电催化剂
双功能
分解水
析氧
氢氧化物
电解质
催化作用
材料科学
化学工程
贵金属
无机化学
电导率
兴奋剂
化学
纳米技术
电极
电化学
物理化学
光电子学
有机化学
光催化
工程类
作者
Wentong Wu,Lei Peng,Boya Min,Jie Huang,Saiya Liu,Kaibo Lu,Shijian Lu,Dengwei Jing,Ming‐Sheng Zheng,Maochang Liu
标识
DOI:10.1016/j.jaecs.2023.100148
摘要
Ni-Fe layered double hydroxide (NiFe-LDH) is regarded as one of the promising non-noble electrocatalyst. However, the limited number of active sites and poor electrical conductivity impede its further development. Herein, we report the synthesis of a Ni foam supported NiFe-LDH electrocatalyst modified by V doping and sulfuration (NiFeV-S/NF). This modification endows the catalyst excellent property toward hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting. Only 211 mV and 127 mV of the overpotentials are required to achieve the current density of 10 mA cm−2 for OER and HER in 1 M KOH electrolyte, respectively. Particularly, the prepared NiFeV-S/NF could serve as a bifunctional electrocatalyst for overall water splitting, with a cell voltage of 1.573 V to reach a current density of 10 mA cm−2. In principle, the success relies on the intrinsically improved conductivity, increased specific surface area and the number of active sites, as well as the heterojunction structure of the catalyst. Therefore, this work provides a new idea for the design and preparation of more efficient noble-metal-free bifunctional electrocatalysts.
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