NMR analysis of phosphoric acid distribution in porous fuel cell catalysts

En Zhang; Natalia Fulik; Hanyue Zhang; Nico Bevilacqua; Roswitha Zeis; Fei Xu; Eike Brunner; Stefan Kaskel

doi:10.1039/d0cc07738k

NMR analysis of phosphoric acid distribution in porous fuel cell catalysts

En Zhang, Natalia Fulik, Hanyue Zhang, Nico Bevilacqua, Roswitha Zeis, Fei Xu, Eike Brunner, Stefan Kaskel

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

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.

Original language	English
Pages (from-to)	2547-2550
Number of pages	4
Journal	Chemical Communications
Volume	57
Issue number	20
DOIs	https://doi.org/10.1039/d0cc07738k
State	Published - 11 Mar 2021
Externally published	Yes

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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.",

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AU - Zhang, En

AU - Fulik, Natalia

AU - Zhang, Hanyue

AU - Bevilacqua, Nico

AU - Zeis, Roswitha

AU - Xu, Fei

AU - Brunner, Eike

AU - Kaskel, Stefan

PY - 2021/3/11

Y1 - 2021/3/11

N2 - 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.

AB - 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.

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U2 - 10.1039/d0cc07738k

DO - 10.1039/d0cc07738k

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JO - Chemical Communications

JF - Chemical Communications

IS - 20

ER -

NMR analysis of phosphoric acid distribution in porous fuel cell catalysts

Abstract

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