Surface hydroxylation engineering to boost oxygen evolution reaction on IrO<sub>2</sub>/TiO<sub>2</sub> for PEM water electrolyzer

doi:10.1016/j.apcatb.2024.124462

	Surface hydroxylation engineering to boost oxygen evolution reaction on IrO₂/TiO₂ for PEM water electrolyzer
	Yang, Chenlu 1,2; Ling, Wenhui3 ; Zhu, Yanping 4; Yang, Yunxiao3 ; Dong, Shu1,3 ; Wu, Chengyu1,3 ; Wang, Zhangrui3 ; Yang, Shuai3 ; Li, Jun 1; Wang, Guoliang 1; Huang, Yifan3 ; Yang, Bo3 ; Cheng, Qingqing 1; Liu, Zhi3 ; Yang, Hui1,3
	2024-12-05
发表期刊	APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
ISSN	0926-3373
EISSN	1873-3883
卷号	358
发表状态	已发表
DOI	10.1016/j.apcatb.2024.124462
摘要	Dynamic evolutionary hypervalent Irx+ species (HVI) plays a decisive role in promoting the catalytic activity towards acidic oxygen evolution reaction (OER) on Ir-based electrocatalysts, but regulating the efficient formation of HVI remains a big challenge. Herein we propose surface hydroxylation engineering to accelerate the formation of HVI along the OER process on the OH-rich IrO2/TiO2 electrocatalyst. In-situ/operando spectroscopies demonstrate that the high concentration OH ligand accelerates the formation of HVI. DFT calculation clarifies that the dynamically evolved HVI benefits to weakening the adsorption free energy and thus boosting the OER kinetics. Differential electrochemical mass spectrometry with O-18 isotope labelling experiment further unveils that the OH ligand directly participates in the OER cycle, facilitating the rapid oxidation of Ir3+ to Ir5+ and the O-O bond formation. PEM water electrolyzer with the optimized IrO2/TiO2 electrocatalyst delivers a low cell voltage of 1.787 V at 2 Acm(-2) with an inaccessible low Ir usage of ca. 0.08 g/kW, while maintaining a good stability over 350 h, with an estimated cost of US$0.88 kg(-1) of H-2, much lower than 2026 US-DOE target.
关键词	Acidic OER High-valence iridium dynamic evolution OH ligand effect High performance PEMWE
URL	查看原文
收录类别	EI ; SCI
语种	英语
资助项目	National Key R&D Program of China[2021YFA1500900] ; National Natural Science Foundation of China[21902177] ; Shanghai Science and Technology Innovation Action Plan["20dz1205402","23ZR1471000","22511102500"] ; Youth Innovation Promotion Association CAS[2021287]
WOS研究方向	Chemistry ; Engineering
WOS类目	Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:001369147200001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/411219
专题	物质科学与技术学院物质科学与技术学院_特聘教授组_杨辉组物质科学与技术学院_PI研究组_杨波组物质科学与技术学院_PI研究组_黄逸凡组物质科学与技术学院_硕士生物质科学与技术学院_博士生
共同第一作者	Ling, Wenhui
通讯作者	Wang, Guoliang; Yang, Hui
作者单位	1.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai; 201210, China 2.University of the Chinese Academy of Sciences, Beijing; 100039, China 3.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China 4.Ningbo CAS Cotrun New Energy S.&T. Co., Ltd., Ningbo; 315303, China
通讯作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Yang, Chenlu,Ling, Wenhui,Zhu, Yanping,et al. Surface hydroxylation engineering to boost oxygen evolution reaction on IrO₂/TiO₂ for PEM water electrolyzer[J]. APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,2024,358.
APA	Yang, Chenlu.,Ling, Wenhui.,Zhu, Yanping.,Yang, Yunxiao.,Dong, Shu.,...&Yang, Hui.(2024).Surface hydroxylation engineering to boost oxygen evolution reaction on IrO₂/TiO₂ for PEM water electrolyzer.APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY,358.
MLA	Yang, Chenlu,et al."Surface hydroxylation engineering to boost oxygen evolution reaction on IrO₂/TiO₂ for PEM water electrolyzer".APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY 358(2024).