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dc.contributor.authorCao, Junhui
dc.contributor.authorWang, Kexin
dc.contributor.authorChen, Jiayi
dc.contributor.authorLei, Chaojun
dc.contributor.authorYang, Bin
dc.contributor.authorLi, Zhongjian
dc.contributor.authorLei, Lecheng
dc.contributor.authorHou, Yang
dc.contributor.authorOstrikov, Kostya
dc.date.accessioned2020-01-15T22:29:01Z
dc.date.available2020-01-15T22:29:01Z
dc.date.issued2019
dc.identifier.issn2311-6706
dc.identifier.doi10.1007/s40820-019-0299-4
dc.identifier.urihttp://hdl.handle.net/10072/390292
dc.description.abstractDemand of highly efficient earth-abundant transition metal-based electrocatalysts to replace noble metal materials for boosting oxygen evolution reaction (OER) is rapidly growing. Herein, an electrochemically exfoliated graphite (EG) foil supported bimetallic selenide encased in N-doped carbon (EG/(Co, Ni)Se2–NC) hybrid is developed and synthesized by a vapor-phase hydrothermal strategy and subsequent selenization process. The as-prepared EG/(Co, Ni)Se2–NC hybrid exhibits a core–shell structure where the particle diameter of (Co, Ni)Se2 core is about 70 nm and the thickness of N-doped carbon shell is approximately 5 nm. Benefitting from the synergistic effects between the combination of highly active Co species and improved electron transfer from Ni species, and N-doped carbon, the EG/(Co, Ni)Se2–NC hybrid shows remarkable electrocatalytic activity toward OER with a comparatively low overpotential of 258 mV at an current density of 10 mA cm−2 and a small Tafel slope of 73.3 mV dec−1. The excellent OER catalysis performance of EG/(Co, Ni)Se2–NC hybrid is much better than that of commercial Ir/C (343 mV at 10 mA cm−2 and 98.1 mV dec−1), and even almost the best among all previously reported binary CoNi selenide-based OER electrocatalysts. Furthermore, in situ electrochemical Raman spectroscopy combined with ex situ X-ray photoelectron spectroscopy analysis indicates that the superb OER catalysis activity can be attributed to the highly active Co–OOH species and modified electron transfer process from Ni element.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherShanghai Jiao Tong University Press
dc.relation.ispartofissue1
dc.relation.ispartofjournalNano-Micro Letters
dc.relation.ispartofvolume11
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchcode4018
dc.subject.keywordsScience & Technology
dc.subject.keywordsTechnology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsNanoscience & Nanotechnology
dc.subject.keywordsMaterials Science, Multidisciplinary
dc.titleNitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationCao, J; Wang, K; Chen, J; Lei, C; Yang, B; Li, Z; Lei, L; Hou, Y; Ostrikov, K, Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis, Nano-Micro Letters, 2019, 11 (1)
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
dc.date.updated2020-01-15T22:23:38Z
dc.description.versionVersion of Record (VoR)
gro.rights.copyright© The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
gro.hasfulltextFull Text
gro.griffith.authorOstrikov, Ken


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