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Abstract

Triphasic microporous materials (containing solid, liquid, and gas) are of interest in electrocatalysis. In this exploratory study, a polymer of intrinsic microporosity (PIM-EA-TB) is impregnated with PdCl4 2 − metal precursor and vacuum‑carbonised to give an electrically conductive microporous heterocarbon with embedded Pd nanoparticles of typically 10–30 nm diameter. This microporous composite catalyst is formed (via spin-coating) as “flakes” of typically 100 nm thickness and 1 to 20 μm diameter that are readily re-deposited onto glassy carbon electrode substrates. Due to the triphasic conditions, Pd@cPIM electrocatalytic reactivity is high but only for gases (H2 oxidation or O2 reduction). This selectivity is observed even in the presence of excess formic acid fuel in the aqueous/liquid phase. The potential for application in membrane-less micro-fuel cells is discussed.

Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalElectrochemistry Communications
Volume86
Early online date8 Nov 2017
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • CO reduction
  • Fuel cell
  • Gas binding
  • Microporosity
  • Triple phase reaction zone

ASJC Scopus subject areas

  • Electrochemistry

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