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Enhanced Water Oxidation Activity by Introducing Gallium into Cobalt‐Iron Oxide System
Author(s) -
Zhang Qiaoqiao,
Fan Yong,
Wang Wei,
Liu Ning,
Guan Jingqi
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901598
Subject(s) - tafel equation , overpotential , oxygen evolution , materials science , oxide , cobalt , inorganic chemistry , water splitting , electrolyte , cobalt oxide , chemical engineering , ternary operation , platinum , transition metal , chemistry , electrode , catalysis , electrochemistry , metallurgy , biochemistry , photocatalysis , computer science , engineering , programming language
Development of high‐efficiency and robust multi‐element transition metal oxides for oxygen evolution reaction (OER) is crucial to improve the energy efficiency of electrocatalytic water splitting. Here, we report a simple and efficient sol‐gel strategy to synthesize an amorphous ternary Fe−Co−Ga oxide composite with high OER activity, low Tafel slope, and good durability. The overpotential at 10 mA ⋅ cm −2 of the FeCoGaO x on glassy carbon, platinum, carbon paper, and nickel foam electrode is 245, 275, 237, and 215 mV, respectively, in an alkaline electrolyte. The addition of gallium into the FeCoO x system significantly promotes the charge transfer kinetics, thus improving the OER activity. This work affords a controllable method to vastly prepare cost‐effective and high‐efficiency multi‐metal water oxidation electrocatalysts.