Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy

doi:10.1038/s41467-020-15498-0

	Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy
	Dou, Yuhai 2; He, Chun-Ting 1; Zhang, Lei 2; Yin, Huajie 2; Al-Mamun, Mohammad 2; Ma, Jianmin 3; Zhao, Huijun 2,4
刊名	NATURE COMMUNICATIONS
	2020-04-03
卷号	11
ISSN号	2041-1723
DOI	10.1038/s41467-020-15498-0
通讯作者	Zhao, Huijun(h.zhao@giffith.edu.au)
英文摘要	Electronic structure engineering lies at the heart of efficient catalyst design. Most previous studies, however, utilize only one technique to modulate the electronic structure, and therefore optimal electronic states are hard to be achieved. In this work, we incorporate both Fe dopants and Co vacancies into atomically thin CoSe2 nanobelts for /coxygen evolution catalysis, and the resulted CoSe2-D-Fe-V-Co exhibits much higher catalytic activity than other defect-activated CoSe2 and previously reported FeCo compounds. Deep characterizations and theoretical calculations identify the most active center of Co-2 site that is adjacent to the VCo-nearest surface Fe site. Fe doping and Co vacancy synergistically tune the electronic states of Co-2 to a near-optimal value, resulting in greatly decreased binding energy of OH* (Delta E-OH) without changing Delta E-O, and consequently lowering the catalytic overpotential. The proper combination of multiple defect structures is promising to unlock the catalytic power of different catalysts for various electrochemical reactions.
资助项目	Australian Research Council (ARC)[DP200100965] ; Griffith University[YUDOU 036]
WOS关键词	RATIONAL DESIGN ; WATER ; NANOSHEETS ; OXIDATION ; ELECTROCATALYSIS ; SITES ; (OXY)HYDROXIDE ; IDENTIFICATION ; NANOBELTS ; TIO2
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000564272800004
资助机构	Australian Research Council (ARC) ; Griffith University
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/102891]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhao, Huijun
作者单位	1.Jiangxi Normal Univ, Coll Chem & Chem Engn, Key Lab Funct Small Organ Mol, Minist Educ, Nanchang 330022, Jiangxi, Peoples R China 2.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia 3.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China 4.Chinese Acad Sci, Ctr Environm & Energy Nanomat, CAS Ctr Excellence Nanosci, Inst Solid State Phys, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Dou, Yuhai,He, Chun-Ting,Zhang, Lei,et al. Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy[J]. NATURE COMMUNICATIONS,2020,11.
APA	Dou, Yuhai.,He, Chun-Ting.,Zhang, Lei.,Yin, Huajie.,Al-Mamun, Mohammad.,...&Zhao, Huijun.(2020).Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy.NATURE COMMUNICATIONS,11.
MLA	Dou, Yuhai,et al."Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy".NATURE COMMUNICATIONS 11(2020).