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Colloidal Ni2-: XCoxP nanocrystals for the hydrogen evolution reaction
dc.contributor.author | Liu, Junfeng |
dc.contributor.author | Wang, Zhenxing |
dc.contributor.author | David, Jeremy |
dc.contributor.author | Llorca Piqué, Jordi |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
dc.date.accessioned | 2018-07-20T09:33:53Z |
dc.date.available | 2019-05-11T00:30:53Z |
dc.date.issued | 2018-05-11 |
dc.identifier.citation | Liu, 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.issn | 2050-7488 |
dc.identifier.uri | http://hdl.handle.net/2117/119655 |
dc.description.abstract | A 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.extent | 10 p. |
dc.language.iso | eng |
dc.publisher | Royal Society of Chemistry (RSC) |
dc.subject | Àrees temàtiques de la UPC::Enginyeria química |
dc.subject.lcsh | Nanocrystals |
dc.subject.lcsh | Hydrogen |
dc.title | Colloidal Ni2-: XCoxP nanocrystals for the hydrogen evolution reaction |
dc.type | Article |
dc.subject.lemac | Nanocristalls |
dc.subject.lemac | Hidrogen |
dc.contributor.group | Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia |
dc.identifier.doi | 10.1039/c8ta03485k |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://pubs.rsc.org/en/content/articlelanding/2018/ta/c8ta03485k#!divAbstract |
dc.rights.access | Open Access |
local.identifier.drac | 23237666 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/665919/EU/Opening Sphere UAB-CEI to PostDoctoral Fellows/P-SPHERE |
local.citation.author | Liu, J.; Wang, Z.; David, J.; Llorca, J. |
local.citation.publicationName | Journal of materials chemistry A |
local.citation.volume | 6 |
local.citation.startingPage | 11453 |
local.citation.endingPage | 11462 |
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