文献类型：期刊文献

英文题名：Superhydrophilic cobalt-doped NiFe LDH graphite felt with enriched oxygen vacancy as an efficient oxygen evolution electrocatalyst in alkaline media

作者：Li, Danni[1];Shao, Xiang[1];Umair, Mushtaq Muhammad[1];Hou, Fubin[1];Li, Sa[1];Tang, Yingming[1];Cao, Limei[1];Yang, Ji[1,2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2024

卷号：80

起止页码：11

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20242916700925);WOS:【SCI-EXPANDED(收录号:WOS:001271570800001)】；

基金：This work is supported by the National Natural Science Foundation of China (51778229) .

语种：英文

外文关键词：NiFe LDH; Oxygen evolution reaction; Graphite felt; Cobalt; Oxygen vacancy

摘要：Efficient non-precious metal electrocatalysts are crucial for hydrogen production through water electrolysis. Combining a superhydrophilic electrocatalyst with oxygen vacancy and a conductive carbon matrix is significant for NiFe LDH-based oxygen evolution reaction (OER) applications. In this study, NiFe LDH nanoflowers and Codoped NiFe LDH nanoneedles were synthesized on graphite felt through an in-situ self-assembly strategy. Further results have shown that doping Co into NiFe LDH nanoarrays significantly enhances the specific surface area and oxygen vacancy density, while the graphite felt serves as a conductive scaffold and prevents active sites detachment. Oxygen vacancies in Co3-Ni7Fe3 LDH/TGF adjust the electronic configuration, and superhydrophilicity promotes effective electrolyte diffusion. This synergy endows Co3-Ni7Fe3 LDH/TGF with excellent OER performance, lower overpotential of 252 mV (10 mA cm-2), a Tafel slope (63.13 mV), and stability at high current densities. This research provides a new perspective for utilizing non-precious metal catalysts on carbon substrates for hydrogen production.