Mo-doped Ni/NiO supported on oxygen-deficient NiMoO4 with carbon derived from tannic acid for hydrogen evolution and hydrogen oxidation
Abstract
The widespread deployment of anion exchange membrane unitized reversible fuel cells is contingent upon the development of stable and efficient non-precious metal electrocatalysts for the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER). This study reports on the synthesis of Mo-doped Ni/NiO hetero-nanoparticles supported on oxygen-deficient NiMoO4 (NiMoOX), with tannic acid (TA) integrated as both a carbon source and stabilizing agent (Ni/NiO-Mo/C@NiMoOX). In situ Raman spectroscopy elucidates the mechanism through which TA enhances the electrocatalytic activity. The resultant catalyst demonstrates superior HOR/HER performance, featuring a current density of 2.5 mA cm−2 at 100 mV overpotential for HOR, remaining stable for 24 h, and in HER, exhibiting a remarkably low overpotential of just −12 mV at a current density of −10 mA cm−2, with stability persisting for over 300 h, outperforming the commercial Pt/C catalyst.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Xueqi Chen
Lijie Zhu
State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Bioactive Natural Product Research, School of Traditional Chinese Pharmacy
Hongzhan Chen
Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Key Laboratory of Nanophotonic Manipulation, Department of Physics, Jinan University 1 , Guangzhou, Guangdong 510632,
Ya Tang
Feng Lin
Fangyan Xie
Instrumental Analysis and Research Center Sun Yat‐sen University Guangzhou 510275 China
Jian Chen
Nan Wang
Yanshuo Jin
Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Key Laboratory of Nanophotonic Manipulation, Department of Physics, Jinan University 1 , Guangzhou, Guangdong 510632,
Hui Meng
Department of Mechanical and Aerospace Engineering