Ru nanoparticles supported on alginate-derived graphene as hybrid electrodes for the hydrogen evolution reaction
Mallón, Laura (Universitat Autònoma de Barcelona. Departament de Química)
Cerezo, Christian (Universitat Politècnica de València. Institut de Tecnologia Química)
Romero Fernández, Nuria (Universitat Autònoma de Barcelona. Departament de Química)
Puche, Marta (Universitat Politècnica de València. Institut de Tecnologia Química)
García-Antón, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Bofill Arasa, Roger (Universitat Autònoma de Barcelona. Departament de Química)
Philippot, Karine (Université de Toulouse)
Martínez-Prieto, Luis Miguel (Universitat Politècnica de València. Institut de Tecnologia Química)
Sala Román, Xavier (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2022
Resum:	The development of organic-inorganic hybrid materials for redox catalysis is key to access new energy conversion schemes and the sustainable production of dihydrogen. Here, bare and P-doped graphene arising from the pyrolysis of biomass (alginate from marine algae) has been used as a support for the growth and stabilization of ultra-small Ru/RuO2 NPs through organometallic synthesis. P-doped graphene allows obtaining smaller and better dispersed NPs in hybrid electrodes of lower roughness and electroactive surface area. Electrochemical activation of the as-synthesised supported nanoparticles by reduction of the passivating RuO2 layer generates excellent HER electrocatalysts under acidic conditions (η10 of 29 mV and 15 mV for the bare and P-doped electrodes, respectively). P doping, identified as surface phosphates by 31P solid state NMR, induces improvement of all HER benchmarking parameters studied, including overpotential and exchange and specific current densities. All studied materials show excellent long-term stability and selectivity for hydrogen generation with no sign of deactivation after 12 h under turnover conditions and almost quantitative faradaic efficiencies.
Ajuts:	Ministerio de Economía y Competitividad PID2019-104171RB-I00
Drets:
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Publicat a:	New journal of chemistry, Vol. 46 (Jan. 2022) , p. 49-56, ISSN 1369-9261

DOI: 10.1039/D1NJ05215B

Postprint 10 p, 1.7 MB

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