Self-Adaptive Dual-Site Synergy with an Optimized Electronic Configuration for Overall Water Splitting in Acidic Media
學年 112
學期 1
出版（發表）日期 2023-08-21
作品名稱 Self-Adaptive Dual-Site Synergy with an Optimized Electronic Configuration for Overall Water Splitting in Acidic Media
作品名稱（其他語言）
著者 Yu-Ru Lin, Chun-Kuo Peng, Yu-Chang Lin, Hsiang-Chun Yu, Chao-Lung Chiang, Suh-Ciuan Lim, San-Yuan Chen, Yan-Gu Lin
單位
出版者
著錄名稱、卷期、頁數 ACS Sustainable Chemistry & Engineering, 11(35), 13108-13115
摘要 In harsh acidic environments, there remains a demand for catalysts that possess both high activity and stability, enabling them to efficiently enhance the slow kinetics of the hydrogen evolution reaction and oxygen evolution reaction, which are crucial for the advancement of proton exchange membrane water electrolyzers. Herein, a bifunctional electrocatalyst was designed by synergistically modulating the electronic and coordination properties. The IrOx/MnOx catalyst was successfully created, surpassing the activity and stability limitations of IrO2 catalysts for acidic overall water splitting, thereby pushing the boundaries of electrocatalytic performance. When used as both electrodes in an overall water-splitting cell, the IrOx/MnOx catalyst achieved a current density of 10 mA cm–2 at 1.51 V for 36 h without any noticeable degradation, which greatly outperformed the commercial couples (Pt/C||IrO2, 1.65 V) in acidic media. Of greater significance, X-ray absorption spectroscopy deciphered that the unsaturated Ir centers, which have an electron-rich nature, can lower energy barriers associated with the proton adsorption and desorption and oxygenated reactant species through a self-adaptive surface reconstruction process. This work introduces an approach to boost the intrinsic performance of catalysts for overall water splitting by constructing unsaturated coordination centers, offering a promising strategy for catalyst design.
關鍵字 Electrocatalyst, Water splitting, Hydrogen evolution reaction, Oxygen evolution reaction, Bifunctional
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 San-Yuan Chen, Yan-Gu Lin
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
SDGS 可負擔的潔淨能源,產業創新與基礎設施