Ruthenium Oxychloride Supported by Manganese Oxide for Stable Oxygen Evolution in Acidic Media
學年 111
學期 1
出版（發表）日期 2022-09-02
作品名稱 Ruthenium Oxychloride Supported by Manganese Oxide for Stable Oxygen Evolution in Acidic Media
作品名稱（其他語言）
著者 Yunxing Zhao, Jun Hu, Chao-Lung Chiang, Ying Li, Weichuang Yang, Zhenhai Yang, Wei-Hsuan Hung, Yan-Gu Lin, Zhong Chen, Bin Li, Pingqi Gao, Hong Li
單位
出版者
著錄名稱、卷期、頁數 Journal of Materials Chemistry A, 10, 20964-20974
摘要 Despite the recent advances in enhancing the durability and reducing the overpotential of ruthenium (Ru)-based electrocatalysts for acidic oxygen evolution reaction (OER), their stability hardly meets the requirement of practical application. Moreover, a cost-effective strategy to stabilize the highly active but unstable Ru species is desirable. Herein, we report a stable electrocatalyst for acidic OER by dispersing the Ru oxychloride active species into a manganese oxide support (RuOCl@MnOx) to form highly dispersed Ru–O–Mn without the alteration of vibrational modes and bond parameters of the MnO6 group, as suggested by Raman and synchrotron radiation characterization studies. The catalyst is stable for continuous operation over 280 h with an overpotential of 228 mV at 10 mA cm−2 and over 200 h at 100 mA cm−2, among the most stable low-mass-loading Ru-based OER electrocatalysts in acidic media. Complementary theoretical calculations ascribe the excellent stability to its high oxidation potential and low formation/surface energies, consistent with experimental observations. The enhanced activity is attributed to the four-coordinated Ru site that bears a low overpotential determined by the formation of O* from OH*. Our work thus offers a new strategy for synthesizing robust OER electrocatalysts of PEM electrolyzers with superior activity.
關鍵字 2022/09/02
語言 en
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 Pingqi Gao, Hong Li
審稿制度 1
國別 GBR
公開徵稿
出版型式 ,電子版
SDGS 產業創新與基礎設施,永續城市與社區,夥伴關係,可負擔的潔淨能源