文献类型：期刊文献

英文题名：Accelerating corrosion of iron foam enables a bifunctional catalyst for overall water splitting

作者：Liu, Yunhua Mao, Jianfei Yuan, Yujie Huang, Hongsheng Ma, Xianguo Li, Xiaoqin Jin, Zhaoyu

第一作者：刘云花

通信作者：Li, XQ[1];Jin, ZY[2]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550000, Peoples R China;[2]Sichuan Univ, Coll Chem, Chengdu 610065, Peoples R China;[3]Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China;[4]Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China;corresponding author), Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China.

年份：2023

卷号：7

期号：22

起止页码：5858-5867

外文期刊名：MATERIALS CHEMISTRY FRONTIERS

收录：;EI(收录号：20234214903959);Scopus(收录号：2-s2.0-85173824355);WOS:【SCI-EXPANDED(收录号:WOS:001071091700001)】；

基金：This work was supported by the Natural Science Foundation of Guizhou Province (QiankeheJichu-ZK [2021] Yiban050), High-Level Scientific Research Founding Project of Guizhou Institute of Technology (XJGC20190961), Key Laboratory of Energy Chemistry in Guizhou universities (Qian Jiao Ji [2022]035), and Top Talent Project of Guizhou Provincial Department of Education (Guizhou Education Technology [2022]084).

语种：英文

外文关键词：Catalyst activity - Chlorine compounds - Electrocatalysts - Electrodes - Electrolysis - Foams - Hydrogen fuels - Hydrogen production - Iron compounds - Nickel compounds

摘要：To facilitate the green hydrogen economy, it is essential to establish an economical, secure, and large-scale method for producing highly efficient electrocatalysts capable of facilitating overall water splitting. Herein, we demonstrate a facile approach by growing nickel-iron nanoparticles and layered double hydroxide (LDH) nanosheet composites in situ on a Fe-foam substrate via ammonium chloride-assisted corrosion at room temperature. This method does not require electrical input, high temperature, or a tedious synthesis procedure. The obtained catalyst exhibits high catalytic activity for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), providing a high current density of 500 mA cm-2 at an overpotential of 270 mV for the OER and 183 mV for the HER. In addition, the catalyst that serves as both the cathode and anode for overall water splitting also exhibits satisfactory performance with a low cell voltage of 1.55 V at 10 mA cm-2 with high stability at different current densities from 10 to 300 mA cm-2 for 70 h. Our findings underline a highly efficient and scalable strategy for the large-scale preparation of bifunctional electrocatalysts for alkaline water electrolysis. A bifunctional NiFe nanoparticle-modified layered double hydroxide nanosheet electrocatalyst was fabricated using a facile NH4Cl-assisted corrosion strategy at room temperature for highly efficient overall water splitting.