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Atomic-Step Enriched Ruthenium-Iridium Nanocrystals Anchored Homogeneously on MOF-Derived Support for Efficient and Stable Oxygen Evolution in Acidic and Neutral Media
Xu, Junyuan1; Li, Junjie2,3,4,5; Lian, Zan6,7; Araujo, Ana1; Li, Yue1; Wei, Bin8; Yu, Zhipeng1; Bondarchuk, Oleksandr1; Amorim, Isilda1,9; Tileli, Vasiliki2; Li, Bo6; Liu, Lifeng1
Corresponding AuthorTileli, Vasiliki(vasiliki.tileli@epfl.ch) ; Li, Bo(boli@imr.ac.cn) ; Liu, Lifeng(lifeng.liu@inl.int)
2021-03-19
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume11Issue:6Pages:3402-3413
AbstractAchieving 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.
KeywordRuIr nanocrystal atomic step metal organic framework support oxygen evolution reaction electrocatalysis
Funding OrganizationNational Innovation Agency of Portugal through Baterias 2030 project ; National Natural Science Foundation of China
DOI10.1021/acscatal.0c04117
Indexed BySCI
Language英语
Funding ProjectNational Innovation Agency of Portugal through Baterias 2030 project[POCI-01-0247-FEDER-046109] ; National Natural Science Foundation of China[21573255]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000631434600020
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161848
Collection中国科学院金属研究所
Corresponding AuthorTileli, Vasiliki; Li, Bo; Liu, Lifeng
Affiliation1.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
Recommended Citation
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.
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