Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media

doi:10.1021/acscatal.0c04117

IMR OpenIR

	Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media
	Xu, Junyuan 1; Li, Junjie 2,3,4,5; Lian, Zan 6,7; Araujo, Ana 1; Li, Yue 1; Wei, Bin 8; Yu, Zhipeng 1; Bondarchuk, Oleksandr 1; Amorim, Isilda 1,9; Tileli, Vasiliki 2; Li, Bo 6; Liu, Lifeng 1
通讯作者	Tileli, Vasiliki(vasiliki.tileli@epfl.ch) ; Li, Bo(boli@imr.ac.cn) ; Liu, Lifeng(lifeng.liu@inl.int)
	2021-03-19
发表期刊	ACS CATALYSIS
ISSN	2155-5435
卷号	11 期号:6 页码:3402-3413
摘要	Achieving an efficient and stable oxygen evolution reaction (OER) in an acidic or neutral medium is of paramount importance for hydrogen production via proton exchange membrane water electrolysis (PEM-WE). Supported iridium-based nanoparticles (NPs) are the state-of-the-art OER catalysts for PEM-WE, but the nonhomogeneous dispersion of these NPs on the support together with their nonuniform sizes usually leads to catalyst migration and agglomeration under strongly corrosive and oxidative OER conditions, eventually causing the loss of active surface area and/or catalytic species and thereby the degradation of OER performance. Here, we design a catalyst comprising surface atomic-step enriched ruthenium-iridium (RuIr) nanocrystals homogeneously dispersed on a metal organic framework (MOF) derived carbon support (RuIr@CoNC), which shows outstanding catalytic performance for OER with high mass activities of 2041, 970 and 205 A g(RuIr)(-1) at an overpotential of 300 mV and can sustain continuous OER electrolysis up to 40, 45, and 90 h at 10 mA cm(-2) with minimal degradation in 0.5 M H2SO4 (pH = 0.3), 0.05 M H2SO4 (pH = 1), and PBS (pH = 7.2) electrolytes, respectively. Comprehensive experimental studies and density functional theory (DFT) calculations reveal that the good performance of RuIr@CoNC can be attributed, on one hand, to the presence of abundant atomic steps that maximize the exposure of catalytically active sites and lower the limiting potential of the rate-determining step of OER and, on the other hand, to the strong interaction between RuIr nanocrystals and the CoNC support that endows homogeneous dispersion and firm immobilization of RuIr catalysts on CoNC. The RuIr@CoNC catalysts also show outstanding performance in a single-cell PEM electrolyzer, and their large-quantity synthesis is demonstrated.
关键词	RuIr nanocrystal atomic step metal organic framework support oxygen evolution reaction electrocatalysis
资助者	National Innovation Agency of Portugal through Baterias 2030 project ; National Natural Science Foundation of China
DOI	10.1021/acscatal.0c04117
收录类别	SCI
语种	英语
资助项目	National Innovation Agency of Portugal through Baterias 2030 project[POCI-01-0247-FEDER-046109] ; National Natural Science Foundation of China[21573255]
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:000631434600020
出版者	AMER CHEMICAL SOC
引用统计	被引频次：119[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/161848
专题	中国科学院金属研究所
通讯作者	Tileli, Vasiliki; Li, Bo; Liu, Lifeng
作者单位	1.Int Iberian Nanotechnol Lab INL, P-4715330 Braga, Portugal 2.Ecole Polytech Fed Lausanne, Inst Mat, CH-1015 Lausanne, Switzerland 3.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Beijing, Peoples R China 4.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Beijing, Peoples R China 5.Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China 6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 7.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 8.Univ Minho, Ctr Chem, Chem Dept, Guitar Caempus, P-4710057 Braga, Portugal 9.Sun Yat Sen Univ, Sch Mat, Guangzhou 510275, Peoples R China
推荐引用方式 GB/T 7714	Xu, Junyuan,Li, Junjie,Lian, Zan,et al. Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media[J]. ACS CATALYSIS,2021,11(6):3402-3413.
APA	Xu, Junyuan.,Li, Junjie.,Lian, Zan.,Araujo, Ana.,Li, Yue.,...&Liu, Lifeng.(2021).Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media.ACS CATALYSIS,11(6),3402-3413.
MLA	Xu, Junyuan,et al."Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media".ACS CATALYSIS 11.6(2021):3402-3413.