Mesoporous Ni-Pt nanoparticles on Ni foam by electrodeposition : Dual porosity for efficient alkaline hydrogen evolution
Eiler, Konrad (Universitat Autònoma de Barcelona. Departament de Física)
Alcaide, Francisco (Centre for Electrochemical Technologies)
García-Lecina, Eva (Centre for Electrochemical Technologies)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2025
Description:	10 pàg.
Abstract:	In order to maximise electrochemically active surface area for water splitting, mesoporous Ni-Pt nanoparticles (NPs) are electrodeposited onto open-cell Ni foam to obtain a dual (macro- and meso-) porosity. Homogeneous deposition of the NPs is achieved by the use of a cylindrical Pt-coated mesh counter electrode, establishing a uniform electric field around the Ni foam substrate during electrodeposition. The Ni/Pt ratio is tunable with the electrodeposition parameters and all NPs are single-phase face-centred cubic solid solution and nanocrystalline, with a pore size of approx. 10 nm. Ni foam decorated with the Ni-rich particles, with mean particle sizes ranging from 50 to 80 nm, shows significantly higher activity at hydrogen evolution reaction (HER) in alkaline media with respect to the bare Ni foam. The highest HER efficiency was found fora relatively low Pt content of the NPs of about 26 at% (i. e. , at 74 at% Ni) with an improvement of a factor 8 over bare Ni foam after durability assessment. These improvements are attributed to the higher surface area thanks to the NP structure, the dual porosity, and the alloying with Pt.
Grants:	European Commission 101058076 European Commission 764977 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00651 Agencia Estatal de Investigación PID2020-116844RB-C21 Agencia Estatal de Investigación PID2020-116844RB-C22
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Electrodeposition ; Energy conversion ; Hydrogen evolution reaction ; Mesoporous materials ; Water splitting ; SDG 7 - Affordable and Clean Energy
Published in:	International journal of hydrogen energy, Vol. 99 (January 2025) , pag. 448-457, ISSN 1879-3487

DOI: 10.1016/j.ijhydene.2024.12.103

10 p, 6.2 MB

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