Efficient Electrochemical Production of Syngas from CO2 and H2O by using a Nanostructured Ag/g-C3N4 Catalyst

Francesc Sastre, Mario J. Muñoz-Batista, Anna Kubacka, Marcos Fernández-García, Wilson A. Smith, Freek Kapteijn, Michiel Makkee, Jorge Gascon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

A new series of electrocatalysts consisting of Ag nanoparticles supported on graphitic carbon nitride (g-C3N4) are presented. The combination of nanostructured silver and a carbon nitride support results in the direct generation of synthesis gas (CO+H2) during the electrocatalytic reduction of CO2 in water. By using a state-of-the-art electrocatalytic setup, the influence of different operation parameters over the final product composition is shown. The H2/CO product ratio can easily be tuned from 100:1 to 2:1 with high reproducibility by controlling the applied potential and the Ag loading. More importantly, long-term and catalyst reuse experiments demonstrate the robustness of these electrodes, which could be operated for over 20 h time on stream and reused several times without any evident loss of activity or selectivity. Our results highlight the potential of nanostructuring Ag-based catalysts and the relevance of the selected support for the green valorization of CO2.

Original languageEnglish (US)
Pages (from-to)1497-1502
Number of pages6
JournalChemElectroChem
Volume3
Issue number9
DOIs
StatePublished - Sep 1 2016
Externally publishedYes

Keywords

  • carbon dioxide
  • carbon nitride
  • electrocatalysis
  • silver
  • syngas

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

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