Open AccessA New High Entropy Glycerate for High Performance Oxygen Evolution Reaction
Author(s) -
Nguyen Thi Xuyen,
Su YenHsun,
Lin ChiaChun,
Ruan Jrjeng,
Ting JyhMing
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202002446
Subject(s) - overpotential , ternary operation , electrolyte , oxygen evolution , metal , materials science , current density , chemical engineering , chemistry , electrochemistry , electrode , metallurgy , computer science , physics , quantum mechanics , engineering , programming language
Herein, a new high entropy material is reported, i.e., a noble metal‐free high entropy glycerate (HEG), synthesized via a simple solvothermal process. The HEG consists of 5 different metals of Fe, Ni, Co, Cr, and Mn. The unique glycerate structure exhibits an excellent oxygen evolution reaction (OER) activity with a low overpotential of 229 and 278 mV at current densities of 10 and 100 mA cm −2 , respectively, in 1 m KOH electrolyte, outperforming its subsystems of binary‐, ternary‐, and quaternary‐metal glycerates. The HEG also shows outstanding stability and durability in the alkaline electrolyte. The result demonstrates the significance of synergistic effect that gives additional freedoms to modify the electronic structure and coordination environment. Moreover, HEG@HEG electrolyzer shows a good overall water splitting performance and durability, requiring a cell voltage of 1.63 V to achieve a current density of 10 mA cm −2 .