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

Laura Mallon Pernia, Christian Cerezo-Navarrete, Nuria Romero, Marta Puche, Jordi Garcia Anton Aviño, Roger Bofill Arasa, Karine Philippot, Luis M. Martínez-Prieto, Xavier Sala Roman

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

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 2NPs 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 2layer generates excellent HER electrocatalysts under acidic conditions (η 10of 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.

Original languageEnglish
Pages (from-to)49-56
Number of pages8
JournalNew Journal of Chemistry
Volume46
Issue number1
DOIs
Publication statusPublished - 7 Jan 2022

Keywords

  • CATALYST
  • ENERGY
  • N-DOPED GRAPHENE
  • RUTHENIUM

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