NMR analysis of phosphoric acid distribution in porous fuel cell catalysts

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

Understanding the interaction of phosphoric acid and porous electrocatalysts is of vital importance for a rational design of high performance phosphoric acid based fuel cells on a molecular level. We demonstrate for the first time that NMR spectroscopy can be used for elucidating the preferred distribution sites of phosphoric acid in various nanoporous carbons. A pore size dependent negative chemical shift of31P is observed, serving as a distinct signature of pore occupation, and applied for analysing a commercial catalyst (Pt@Vulcan) as a practical application.

Details

Original languageEnglish
Pages (from-to)2547-2550
Number of pages4
JournalChemical communications
Volume57
Issue number20
Publication statusPublished - 5 Feb 2021
Peer-reviewedYes

External IDs

PubMed 33585854