Carbon-neutral energy cycles using alcohols

Takashi Fukushima, Sho Kitano, Shinichi Hata, Miho Yamauchi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We demonstrated carbon-neutral (CN) energy circulation using glycolic acid (GC)/oxalic acid (OX) redox couple. Here, we report fundamental studies on both catalyst search for power generation process, i.e. GC oxidation, and elemental steps for fuel generation process, i.e. OX reduction, in CN cycle. The catalytic activity test on various transition metals revealed that Rh, Pd, Ir, and Pt have preferable features as a catalyst for electrochemical oxidation of GC. A carbon-supported Pt catalyst in alkaline conditions exhibited higher activity, durability, and product selectivity for electrooxidation of GC rather than those in acidic media. The kinetic study on OX reduction clearly indicated that OX reduction undergoes successive two-electron reductions to form GC. Furthermore, application of TiO2 catalysts with large specific area for electrochemical reduction of OX facilitates the selective formation of GC.

Original languageEnglish
Pages (from-to)142-152
Number of pages11
JournalScience and Technology of Advanced Materials
Volume19
Issue number1
DOIs
Publication statusPublished - 2018 Dec 31
Externally publishedYes

Keywords

  • electrolyzer
  • fuel cell
  • hydrogenation of carboxylic acid
  • Selective electrooxidation of alcohol
  • TiO

ASJC Scopus subject areas

  • Materials Science(all)

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