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

CORC > 金属研究所 > 中国科学院金属研究所

	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 2; Li, Junjie 1,3,4,5; Lian, Zan 6,7; Araujo, Ana 2; Li, Yue 2; Wei, Bin 8; Yu, Zhipeng 2; Bondarchuk, Oleksandr 2; Amorim, Isilda 2,9; Tileli, Vasiliki 3
刊名	ACS CATALYSIS
	2021-03-19
卷号	11 期号:6 页码:3402-3413
关键词	RuIr nanocrystal atomic step metal organic framework support oxygen evolution reaction electrocatalysis
ISSN号	2155-5435
DOI	10.1021/acscatal.0c04117
通讯作者	Tileli, Vasiliki(vasiliki.tileli@epfl.ch) ; Li, Bo(boli@imr.ac.cn) ; Liu, Lifeng(lifeng.liu@inl.int)
英文摘要	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.
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
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000631434600020
资助机构	National Innovation Agency of Portugal through Baterias 2030 project ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161847]
专题	金属研究所_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.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Beijing, Peoples R China 2.Int Iberian Nanotechnol Lab INL, P-4715330 Braga, Portugal 3.Ecole Polytech Fed Lausanne, Inst Mat, CH-1015 Lausanne, Switzerland 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.