Water oxidation electrocatalysis using ruthenium coordination oligomers adsorbed on multiwalled carbon nanotubes

Md Asmaul Hoque, Marcos Gil-Sepulcre, Adiran de Aguirre, Johannes A.A.W. Elemans, Dooshaye Moonshiram, Roc Matheu, Yuanyuan Shi, Jordi Benet-Buchholz, Xavier Sala, Marc Malfois, Eduardo Solano, Joohyun Lim, Alba Garzón-Manjón, Christina Scheu, Mario Lanza, Feliu Maseras, Carolina Gimbert-Suriñach, Antoni Llobet

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Photoelectrochemical cells that utilize water as a source of electrons are one of the most attractive solutions for the replacement of fossil fuels by clean and sustainable solar fuels. To achieve this, heterogeneous water oxidation catalysis needs to be mastered and properly understood. The search continues for a catalyst that is stable at the surface of electro(photo)anodes and can efficiently perform this reaction at the desired neutral pH. Here, we show how oligomeric Ru complexes can be anchored on the surfaces of graphitic materials through CH–π interactions between the auxiliary ligands bonded to Ru and the hexagonal rings of the graphitic surfaces, providing control of their molecular coverage. These hybrid molecular materials behave as molecular electroanodes that catalyse water oxidation to dioxygen at pH 7 with high current densities. This strategy for the anchoring of molecular catalysts on graphitic surfaces can potentially be extended to other transition metals and other catalytic reactions. [Figure not available: see fulltext.]
Original languageEnglish (US)
Pages (from-to)1060-1066
Number of pages7
JournalNature Chemistry
Volume12
Issue number11
DOIs
StatePublished - Nov 1 2020
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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