Hydrogenation of oxalic acid using light-assisted water electrolysis for the production of an alcoholic compound

Sho Kitano, Miho Yamauchi, Shinichi Hata, Ryota Watanabe, Masaaki Sadakiyo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We demonstrate the production of glycolic acid, an industrially important alcoholic compound, via the electrochemical reduction of oxalic acid, which is procurable from biomass, and electro-oxidation of water with the help of renewable light energy for the first time. In principle, this new synthesis system is achievable while minimizing the consumption of fossil resources. We built a precious-metal free electrosynthesis system by employing a TiO2 cathode for oxalic acid reduction and a WO3 photoanode for water oxidation. The alcohol production proceeds during the application of electric power above 2.1 V in the dark. Notably, UV-visible light irradiation of the WO3 photoanode enables glycolic acid electrosynthesis above 0.5 V, which is lower (by 0.6 V) than the theoretical bias, i.e., 1.1 V. Glycolic acid electrosynthesis with an 80% high Faradaic efficiency was achieved on applying a bias of 1.5 V under UV-visible irradiation (λ > 300 nm).

Original languageEnglish
Pages (from-to)3700-3706
Number of pages7
JournalGreen Chemistry
Volume18
Issue number13
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

Fingerprint Dive into the research topics of 'Hydrogenation of oxalic acid using light-assisted water electrolysis for the production of an alcoholic compound'. Together they form a unique fingerprint.

Cite this