Self-Adaptive Dual-Site Synergy with an Optimized Electronic Configuration for Overall Water Splitting in Acidic Media

doi:10.1021/acssuschemeng.3c03306

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/127781

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/127781

Title:	Self-Adaptive Dual-Site Synergy with an Optimized Electronic Configuration for Overall Water Splitting in Acidic Media
Authors:	Lin, Yu-Ru;Peng, Chun-Kuo;Lin, Yu-Chang;Yu, Hsiang-Chun;Chiang, Chao-Lung;Lim, Suh-Ciuan;Chen, San-Yuan;Lin, Yan-Gu
Keywords:	Electrocatalyst;Water splitting;Hydrogen evolution reaction;Oxygen evolution reaction;Bifunctional
Date:	2023/08/20
Issue Date:	2025-09-17 12:06:12 (UTC+8)
Publisher:	ACS Publications
Abstract:	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.
Relation:	ACS Sustainable Chemistry & Engineering 11(35), 13108-13115
DOI:	10.1021/acssuschemeng.3c03306
Appears in Collections:	[化學工程與材料工程學系暨研究所] 期刊論文

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