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dc.contributor.authorXiao, Zhang
dc.contributor.authorFan, Jiajun
dc.contributor.authorLu, Xunyu
dc.contributor.authorHan, Zhaojun
dc.contributor.authorCazorla Silva, Claudio
dc.contributor.authorHu, Long
dc.contributor.authorWu, Tom
dc.contributor.authorChu, Dewei
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2021-05-11T08:44:20Z
dc.date.issued2021-07-01
dc.identifier.citationXiao, Z. [et al.]. Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: the role of vertical graphene. "Chemical engineering journal", 1 Juliol 2021, vol. 415, núm. 129048.
dc.identifier.issn1385-8947
dc.identifier.urihttp://hdl.handle.net/2117/345409
dc.description.abstractIn this work, we report a bifunctional electrocatalyst with nickel sulphide (Ni3S2) as the template, vertical graphene (VG) as the bridging material, and nickel–cobalt layered double hydroxides (NiCo LDHs) nanosheets as the active catalyst. The hybrid Ni3S2/VG@NiCo LDHs catalyst exhibits excellent activity in alkaline solution for both OER (overpotential ~ 320 mV at a current density of 100 mA cm-2) and HER (overpotential ~ 120 mV at a current density of 10 mA cm-2). In addition, the hybrid catalyst possesses superior stability with 99% retention of voltage upon a continued current density of 20 mV cm-2 for over 24 h. It is found that the transitions of Ni2+/Ni3+ and Co2+/Co3+ ions enable excellent HER and OER performances, and VG bridging between NiCo LDHs and Ni3S2, enable fast charge-transfer and a high density of active sites, resulting in the improved electrical conductivity, intrinsic activity, and electrochemical stability. This work provides a guideline to design the architecture of bifunctional catalysts for highly efficient water splitting applications.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshGraphene
dc.subject.lcshLayered double hydroxides
dc.subject.otherVertical graphene
dc.subject.otherWater splitting
dc.subject.otherLDH
dc.titleBridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: the role of vertical graphene
dc.typeArticle
dc.subject.lemacGrafè
dc.contributor.groupUniversitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity
dc.identifier.doi10.1016/j.cej.2021.129048
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/abs/pii/S1385894721006392
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac31206541
dc.description.versionPostprint (author's final draft)
dc.date.lift2023-02-21
local.citation.authorXiao, Z.; Fan, J.; Lu, X.; Han, Z.; Cazorla, C.; Hu, L.; Wu, T.; Chu, D.
local.citation.publicationNameChemical engineering journal
local.citation.volume415
local.citation.number129048


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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain