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dc.contributor.authorLiu, Junfeng
dc.contributor.authorWang, Zhenxing
dc.contributor.authorDavid, Jeremy
dc.contributor.authorLlorca Piqué, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2018-07-20T09:33:53Z
dc.date.available2019-05-11T00:30:53Z
dc.date.issued2018-05-11
dc.identifier.citationLiu, J., Wang, Z., David, J., Llorca, J. Colloidal Ni2-: XCoxP nanocrystals for the hydrogen evolution reaction. "Journal of materials chemistry A", 11 Maig 2018, vol. 6, p. 11453-11462.
dc.identifier.issn2050-7488
dc.identifier.urihttp://hdl.handle.net/2117/119655
dc.description.abstractA cost-effective and scalable approach was developed to produce monodisperse Ni2-xCoxP nanocrystals (NCs) with composition tuned over the entire range (0 = x = 2). Ni2-xCoxP NCs were synthesized using low-cost, stable and low-toxicity triphenyl phosphite (TPP) as a phosphorus source, metal chlorides as metal precursors and hexadecylamine (HDA) as a ligand. The synthesis involved the nucleation of amorphous Ni–P and its posterior crystallization and simultaneous incorporation of Co. The composition, size and morphology of the Ni2-xCoxP NCs could be controlled simply by varying the ratio of Ni and Co precursors and the amounts of TPP and HDA. Ternary Ni2-xCoxP-based electrocatalysts exhibited enhanced electrocatalytic activity toward the hydrogen evolution reaction (HER) compared to binary phosphides. In particular, NiCoP electrocatalysts displayed the lowest overpotential of 97 mV at J = 10 mA cm-2 and an excellent long-term stability. DFT calculations of the Gibbs free energy for hydrogen adsorption at the surface of Ni2-xCoxP NCs showed NiCoP to have the most appropriate composition to optimize this parameter within the whole Ni2-xCoxP series. However, the hydrogen adsorption energy was demonstrated not to be the only parameter controlling the HER activity in Ni2-xCoxP.
dc.format.extent10 p.
dc.language.isoeng
dc.publisherRoyal Society of Chemistry (RSC)
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshNanocrystals
dc.subject.lcshHydrogen
dc.titleColloidal Ni2-: XCoxP nanocrystals for the hydrogen evolution reaction
dc.typeArticle
dc.subject.lemacNanocristalls
dc.subject.lemacHidrogen
dc.contributor.groupUniversitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.identifier.doi10.1039/c8ta03485k
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://pubs.rsc.org/en/content/articlelanding/2018/ta/c8ta03485k#!divAbstract
dc.rights.accessOpen Access
local.identifier.drac23237666
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/665919/EU/Opening Sphere UAB-CEI to PostDoctoral Fellows/P-SPHERE
local.citation.authorLiu, J.; Wang, Z.; David, J.; Llorca, J.
local.citation.publicationNameJournal of materials chemistry A
local.citation.volume6
local.citation.startingPage11453
local.citation.endingPage11462


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