Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell

Hirosuke Matsui; Nozomu Ishiguro; Tomoya Uruga; Oki Sekizawa; Kotaro Higashi; Naoyuki Maejima; Mizuki Tada

doi:10.1002/anie.201703940

Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell

Hirosuke Matsui, Nozomu Ishiguro, Tomoya Uruga, Oki Sekizawa, Kotaro Higashi, Naoyuki Maejima, Mizuki Tada

SRIS - Cross Fertilization Division

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52 Citations (Scopus)

Abstract

The three-dimensional (3D) distribution and oxidation state of a Pt cathode catalyst in a practical membrane electrode assembly (MEA) were visualized in a practical polymer electrolyte fuel cell (PEFC) under fuel-cell operating conditions. Operando 3D computed-tomography imaging with X-ray absorption near edge structure (XANES) spectroscopy (CT-XANES) clearly revealed the heterogeneous migration and degradation of Pt cathode catalyst in an MEA during accelerated degradation test (ADT) of PEFC. The degradative Pt migration proceeded over the entire cathode catalyst layer and spread to MEA depth direction into the Nafion membrane.

Original language	English
Pages (from-to)	9371-9375
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	56
Issue number	32
DOIs	https://doi.org/10.1002/anie.201703940
Publication status	Published - 2017 Aug 1

Keywords

catalyst degradation
computed tomography
polymer electrolyte fuel cell
Pt cathode catalyst
XANES imaging

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10.1002/anie.201703940

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title = "Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell",

abstract = "The three-dimensional (3D) distribution and oxidation state of a Pt cathode catalyst in a practical membrane electrode assembly (MEA) were visualized in a practical polymer electrolyte fuel cell (PEFC) under fuel-cell operating conditions. Operando 3D computed-tomography imaging with X-ray absorption near edge structure (XANES) spectroscopy (CT-XANES) clearly revealed the heterogeneous migration and degradation of Pt cathode catalyst in an MEA during accelerated degradation test (ADT) of PEFC. The degradative Pt migration proceeded over the entire cathode catalyst layer and spread to MEA depth direction into the Nafion membrane.",

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T1 - Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell

AU - Matsui, Hirosuke

AU - Ishiguro, Nozomu

AU - Uruga, Tomoya

AU - Sekizawa, Oki

AU - Higashi, Kotaro

AU - Maejima, Naoyuki

AU - Tada, Mizuki

PY - 2017/8/1

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N2 - The three-dimensional (3D) distribution and oxidation state of a Pt cathode catalyst in a practical membrane electrode assembly (MEA) were visualized in a practical polymer electrolyte fuel cell (PEFC) under fuel-cell operating conditions. Operando 3D computed-tomography imaging with X-ray absorption near edge structure (XANES) spectroscopy (CT-XANES) clearly revealed the heterogeneous migration and degradation of Pt cathode catalyst in an MEA during accelerated degradation test (ADT) of PEFC. The degradative Pt migration proceeded over the entire cathode catalyst layer and spread to MEA depth direction into the Nafion membrane.

AB - The three-dimensional (3D) distribution and oxidation state of a Pt cathode catalyst in a practical membrane electrode assembly (MEA) were visualized in a practical polymer electrolyte fuel cell (PEFC) under fuel-cell operating conditions. Operando 3D computed-tomography imaging with X-ray absorption near edge structure (XANES) spectroscopy (CT-XANES) clearly revealed the heterogeneous migration and degradation of Pt cathode catalyst in an MEA during accelerated degradation test (ADT) of PEFC. The degradative Pt migration proceeded over the entire cathode catalyst layer and spread to MEA depth direction into the Nafion membrane.

KW - catalyst degradation

KW - computed tomography

KW - polymer electrolyte fuel cell

KW - Pt cathode catalyst

KW - XANES imaging

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Operando 3D Visualization of Migration and Degradation of a Platinum Cathode Catalyst in a Polymer Electrolyte Fuel Cell

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Keywords

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