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dc.contributor.authorChen, Wenxia
dc.contributor.authorZhang, Yiwei
dc.contributor.authorChen, Guangliang
dc.contributor.authorHuang, Rong
dc.contributor.authorWu, Yangjin
dc.contributor.authorZhou, Yuming
dc.contributor.authorHu, Yingjie
dc.contributor.authorOstrikov, Kostya Ken
dc.date.accessioned2020-02-14T03:13:00Z
dc.date.available2020-02-14T03:13:00Z
dc.date.issued2020
dc.identifier.issn0021-9797
dc.identifier.doi10.1016/j.jcis.2019.10.099
dc.identifier.urihttp://hdl.handle.net/10072/391475
dc.description.abstractElectrocatalytic water splitting using bi-functional catalysts is one of the most promising approaches for clean hydrogen fuel production. To address shortcomings of the existing catalysts, here we develop a new bi-functional catalysts cobalt-based nano-architecture with ordered, Ni-doped two-dimensional (2D) defect-rich nanosheets. Innovative combination of doping, annealing, and sulfidation is developed to fabricate the hierarchical porous metal sulfide (denoted as Ni-Co-S) nanosheets arrays (HPNA) directly on conductive carbon cloth (CC). Owing to the unique architecture with the specific surface area and porous structure, short ion diffusion paths, the Ni-Co-S HPNA exhibits excellent electrocatalytic activitiy for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution, featuring low overpotentials of 110 and 270 mV at a current density of 10 mA cm−2, respectively. The excellent catalytic performance is attributed to the unique porous structure, abundant active sites and efficient mass transport. More importantly, when the Ni-Co-S HPNA serves as both the anode and cathode, it achieves a 1.62 V at 10 mA cm−2 and remains stable over 12 h of the overall water splitting process. This work opens new avenues for rational design of high-efficiency and stable bifunctional electrocatalysts for water electrolysis and a broader range of clean energy and sustainable chemistry applications.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom426
dc.relation.ispartofpageto435
dc.relation.ispartofjournalJournal of Colloid and Interface Science
dc.relation.ispartofvolume560
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode09
dc.subject.keywordsScience & Technology
dc.subject.keywordsChemistry, Physical
dc.subject.keywordsChemistry
dc.subject.keywordsClean energy
dc.titleHierarchical porous bimetal-sulfide bi-functional nanocatalysts for hydrogen production by overall water electrolysis
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationChen, W; Zhang, Y; Chen, G; Huang, R; Wu, Y; Zhou, Y; Hu, Y; Ostrikov, KK, Hierarchical porous bimetal-sulfide bi-functional nanocatalysts for hydrogen production by overall water electrolysis, Journal of Colloid and Interface Science, 2020, 560, pp. 426-435
dcterms.dateAccepted2019-10-26
dc.date.updated2020-02-14T03:11:57Z
gro.hasfulltextNo Full Text
gro.griffith.authorOstrikov, Kostya (Ken)


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