Dual-functional paired photoelectrocatalytic system for the photocathodic reduction of CO2 to fuels and the anodic oxidation of furfural to value-added chemicals

G. Bharath, K. Rambabu, Abdul Hai, N. Ponpandian, Jens Ejbye Schmidt, Dionysios D. Dionysiou, Mohammad Abu Haija, Fawzi Banat

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The global warming and energy requirement have accentuated the need to convert atmospheric CO2 into fuels through a highly efficient photoelectrochemical cell (PEC) process. Typically, CO2 reduction at the cathode is accompanied by water oxidation at the anode to produce O2, which is not of significant value. Herein, we report the design of paired PEC to reduce CO2 to CH3OH and the oxidation of furfural (FF) to 2-furoic acid (2-FA) and 5-hydroxyfuroic acid (5-HFA). The paired PEC electrolyzer was constructed with Au/α-Fe2O3/RGO and Ru/RGO/Pt based asymmetric electrodes. The photocathode-driven PEC CO2 conversion test showed a high CH3OH yield of 63 μmol L−1 cm−2 at 21.5 % quantum efficiency with a Faradaic efficiency of 91 % at -0.6 V under visible light. The anodic furfural oxidation test demonstrated a higher FF conversion (82 %) with higher yields of 2-FA and 5-HFA. This study showed the potential of the paired PEC process to produce valuable products at both electrodes.

Original languageBritish English
Article number120520
JournalApplied Catalysis B: Environmental
Volume298
DOIs
StatePublished - 5 Dec 2021

Keywords

  • Electro-oxidation of furfural
  • Methanol
  • Photocathode
  • Photoelectrocatalytic CO reduction
  • Sustainable liquid fuel production

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