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 language | English |
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Pages (from-to) | 17-20 |
Number of pages | 4 |
Journal | Electrochemistry Communications |
Volume | 86 |
Early online date | 8 Nov 2017 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
Keywords
- CO reduction
- Fuel cell
- Gas binding
- Microporosity
- Triple phase reaction zone
ASJC Scopus subject areas
- Electrochemistry