Web of Science: 29 cites, Scopus: 30 cites, Google Scholar: cites,
Colloidal Ni2- : XCoxP nanocrystals for the hydrogen evolution reaction
Liu, Junfeng (Institut de Recerca en Energia de Catalunya)
Wang, Zhenxing (Xi'An Jiaotong University)
David, Jeremy (Institut Català de Nanociència i Nanotecnologia)
Llorca, Jordi (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
Li, Junshan (Institut de Recerca en Energia de Catalunya)
Yu, Xiaoting (Institut de Recerca en Energia de Catalunya)
Shavel, Alexey (Institut de Recerca en Energia de Catalunya)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Meyns, Michaela (Institut de Recerca en Energia de Catalunya)
Cabot, Andreu (Institut de Recerca en Energia de Catalunya)

Data: 2018
Resum: A cost-effective and scalable approach was developed to produce monodisperse NiCoP nanocrystals (NCs) with composition tuned over the entire range (0 ≤ x ≤ 2). NiCoP 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 NiCoP NCs could be controlled simply by varying the ratio of Ni and Co precursors and the amounts of TPP and HDA. Ternary NiCoP-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 and an excellent long-term stability. DFT calculations of the Gibbs free energy for hydrogen adsorption at the surface of NiCoP NCs showed NiCoP to have the most appropriate composition to optimize this parameter within the whole NiCoP series. However, the hydrogen adsorption energy was demonstrated not to be the only parameter controlling the HER activity in NiCoP.
Ajuts: AGAUR/2017/SGR-327
European Commission 665919
Drets: Tots els drets reservats.
Llengua: Anglès
Document: Article ; recerca ; Versió sotmesa a revisió
Matèria: Electrocatalytic activity ; Hydrogen adsorption ; Hydrogen evolution reactions ; Long term stability ; Nanocrystal (NCs) ; Phosphorus sources ; Scalable approach ; Triphenyl phosphite
Publicat a: Journal of materials chemistry, Vol. 6, Issue 24 (June 2018) , p. 11453-11462, ISSN 2050-7496

DOI: 10.1039/c8ta03485k

29 p, 5.5 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Institut Català de Nanociència i Nanotecnologia (ICN2)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2019-12-20, darrera modificació el 2021-08-01

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