Ru nanoparticles supported on alginate-derived graphene as hybrid electrodes for the hydrogen evolution reaction

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...

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Bibliographic Details
Published in:New journal of chemistry 2021-12, Vol.46 (1), p.49-56
Main Authors: Mallón, Laura, Cerezo-Navarrete, Christian, Romero, Nuria, Puche, Marta, García-Antón, Jordi, Bofill, Roger, Philippot, Karine, Martínez-Prieto, Luis M, Sala, Xavier
Format: Article
Language:English
Subjects:
Alginates
Catalysis
Chemical Sciences
Electrocatalysts
Electrochemical activation
Electrodes
Energy conversion
Graphene
Hydrogen evolution reactions
Hydrogen production
Material chemistry
Nanoparticles
NMR
Nuclear magnetic resonance
Phosphates
Pyrolysis
Ruthenium
Ruthenium oxide
Selectivity
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Summary: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/RuO 2 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 RuO 2 layer generates excellent HER electrocatalysts under acidic conditions ( η 10 of 29 mV and 15 mV for the bare and P-doped electrodes, respectively). P doping, identified as surface phosphates by 31 P 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. Ultra-small Ru NPs grown on biomass-derived bare/P-doped graphene supports yield efficient and durable electrocatalytic H 2 production from water.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj05215b