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Ruthenium-Doped Cobalt-Chromium Layered Double Hydroxides for Enhancing Oxygen Evolution through Regulating Charge Transfer
Dong, CL; Zhang, XL; Xu, J; Si, R; Sheng, J; Luo, J; Zhang, SN; Dong, WJ; Li, GB; Wang, WC; Huang, FQ
2020-02-01
Source PublicationSMALL
ISSN1613-6810
Issue5
SubtypeArticle
AbstractExploring the origin of transition metal (TM) lattice-doped layered double hydroxides (LDHs) toward the oxygen evolution reaction (OER) plays a crucial role in engineering efficient electrocatalysts. Without understanding the physics behind the TM-induced catalytic enhancements, it would be challenging to design the next generation of electrocatalysts. Herein, single Ru atoms are introduced into a CoCr LDHs lattice to improve activity. In 0.1 m KOH, CoCrRu LDHs require only 290 mV overpotential to drive to 10 mA cm(-2) and show a Tafel slope of 56.12 mV dec(-1). Electronic structure analyses based on density functional theory confirm that promoted OER activity originates from synergetic charge transfer among Ru, Cr, and Co elements. Specifically, Ru dopants can downshift d states of Co and enhance electron donation of Cr to oxygenates, which essentially breaks the scaling relation and achieves higher activity. This work provides insights into how single atomic Ru dopant tunes the electronic structures of its neighbor's active site Co and thus increases OER activities.
DOI10.1002/smll.201905328
WOS KeywordELECTROCATALYST ; PEROVSKITE ; NANOSHEETS ; CATALYSTS ; EXAFS ; WATER
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28380
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Dong, CL,Zhang, XL,Xu, J,et al. Ruthenium-Doped Cobalt-Chromium Layered Double Hydroxides for Enhancing Oxygen Evolution through Regulating Charge Transfer[J]. SMALL,2020(5).
APA Dong, CL.,Zhang, XL.,Xu, J.,Si, R.,Sheng, J.,...&Huang, FQ.(2020).Ruthenium-Doped Cobalt-Chromium Layered Double Hydroxides for Enhancing Oxygen Evolution through Regulating Charge Transfer.SMALL(5).
MLA Dong, CL,et al."Ruthenium-Doped Cobalt-Chromium Layered Double Hydroxides for Enhancing Oxygen Evolution through Regulating Charge Transfer".SMALL .5(2020).
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