Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling

Y. Shao-Horn; P. J. Ferreira; G. J. La O; D. Morgan; H. Gasteiger; R. Makharia

doi:10.1149/1.2214553

Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling

Y. Shao-Horn
, P. J. Ferreira
, G. J. La O
, D. Morgan
, H. Gasteiger
, R. Makharia

Massachusetts Institute of Technology
University of Texas at Austin
University of Wisconsin-Madison
General Motors

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

49 Scopus citations

Abstract

Two different Pt/C samples (Pt/Vulcan and Pt/C-high-surface-area) were subject to potential cycling between 0.6V and 1.0V vs. reversible hydrogen electrode, where significant platinum area loss was found. Both cycled MEA cathode samples were examined and compared in detail by glancing angle X-ray powder Diffraction and transmission electron microscopy (TEM) to reveal processes responsible for observed platinum loss. TEM data and analyses of pristine and cycled Pt/C catalyst and cross-sectional MEA cathode samples unambiguously confirmed that coarsening of platinum particles occurred via two different processes as reported recently¹: i) Ostwald ripening on carbon at the nanometer-scale; and ii) diffusion of soluble platinum species in the ionomer phase at the micrometer-scale, chemical reduction of these species by crossover H₂ molecules and precipitation of platinum particles in the cathode ionomer phase. copyright The Electrochemical Society.

Original language	English
Title of host publication	Durability and Reliability of Low-Temperature Fuel Cells Systems
Publisher	Electrochemical Society Inc.
Pages	185-195
Number of pages	11
Edition	8
ISBN (Electronic)	1566774918
ISBN (Print)	1566774918, 9781566774918
DOIs	https://doi.org/10.1149/1.2214553
State	Published - 2006
Externally published	Yes
Event	Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society - Los Angeles, CA, United States Duration: 16 Oct 2005 → 21 Oct 2005

Publication series

Name	ECS Transactions
Number	8
Volume	1
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Conference

Conference	Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society
Country/Territory	United States
City	Los Angeles, CA
Period	16/10/05 → 21/10/05

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1149/1.2214553

Cite this

Shao-Horn, Y., Ferreira, P. J., La O, G. J., Morgan, D., Gasteiger, H., & Makharia, R. (2006). Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling. In Durability and Reliability of Low-Temperature Fuel Cells Systems (8 ed., pp. 185-195). (ECS Transactions; Vol. 1, No. 8). Electrochemical Society Inc.. https://doi.org/10.1149/1.2214553

@inproceedings{f0ee02016ced4c6e82a46e06a6af5b75,

title = "Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling",

abstract = "Two different Pt/C samples (Pt/Vulcan and Pt/C-high-surface-area) were subject to potential cycling between 0.6V and 1.0V vs. reversible hydrogen electrode, where significant platinum area loss was found. Both cycled MEA cathode samples were examined and compared in detail by glancing angle X-ray powder Diffraction and transmission electron microscopy (TEM) to reveal processes responsible for observed platinum loss. TEM data and analyses of pristine and cycled Pt/C catalyst and cross-sectional MEA cathode samples unambiguously confirmed that coarsening of platinum particles occurred via two different processes as reported recently1: i) Ostwald ripening on carbon at the nanometer-scale; and ii) diffusion of soluble platinum species in the ionomer phase at the micrometer-scale, chemical reduction of these species by crossover H2 molecules and precipitation of platinum particles in the cathode ionomer phase. copyright The Electrochemical Society.",

author = "Y. Shao-Horn and Ferreira, \{P. J.\} and \{La O\}, \{G. J.\} and D. Morgan and H. Gasteiger and R. Makharia",

year = "2006",

doi = "10.1149/1.2214553",

language = "English",

isbn = "1566774918",

series = "ECS Transactions",

publisher = "Electrochemical Society Inc.",

number = "8",

pages = "185--195",

booktitle = "Durability and Reliability of Low-Temperature Fuel Cells Systems",

edition = "8",

note = "Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society ; Conference date: 16-10-2005 Through 21-10-2005",

}

Shao-Horn, Y, Ferreira, PJ, La O, GJ, Morgan, D, Gasteiger, H & Makharia, R 2006, Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling. in Durability and Reliability of Low-Temperature Fuel Cells Systems. 8 edn, ECS Transactions, no. 8, vol. 1, Electrochemical Society Inc., pp. 185-195, Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society, Los Angeles, CA, United States, 16/10/05. https://doi.org/10.1149/1.2214553

Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling. / Shao-Horn, Y.; Ferreira, P. J.; La O, G. J. et al.
Durability and Reliability of Low-Temperature Fuel Cells Systems. 8. ed. Electrochemical Society Inc., 2006. p. 185-195 (ECS Transactions; Vol. 1, No. 8).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling

AU - Shao-Horn, Y.

AU - Ferreira, P. J.

AU - La O, G. J.

AU - Morgan, D.

AU - Gasteiger, H.

AU - Makharia, R.

PY - 2006

Y1 - 2006

N2 - Two different Pt/C samples (Pt/Vulcan and Pt/C-high-surface-area) were subject to potential cycling between 0.6V and 1.0V vs. reversible hydrogen electrode, where significant platinum area loss was found. Both cycled MEA cathode samples were examined and compared in detail by glancing angle X-ray powder Diffraction and transmission electron microscopy (TEM) to reveal processes responsible for observed platinum loss. TEM data and analyses of pristine and cycled Pt/C catalyst and cross-sectional MEA cathode samples unambiguously confirmed that coarsening of platinum particles occurred via two different processes as reported recently1: i) Ostwald ripening on carbon at the nanometer-scale; and ii) diffusion of soluble platinum species in the ionomer phase at the micrometer-scale, chemical reduction of these species by crossover H2 molecules and precipitation of platinum particles in the cathode ionomer phase. copyright The Electrochemical Society.

AB - Two different Pt/C samples (Pt/Vulcan and Pt/C-high-surface-area) were subject to potential cycling between 0.6V and 1.0V vs. reversible hydrogen electrode, where significant platinum area loss was found. Both cycled MEA cathode samples were examined and compared in detail by glancing angle X-ray powder Diffraction and transmission electron microscopy (TEM) to reveal processes responsible for observed platinum loss. TEM data and analyses of pristine and cycled Pt/C catalyst and cross-sectional MEA cathode samples unambiguously confirmed that coarsening of platinum particles occurred via two different processes as reported recently1: i) Ostwald ripening on carbon at the nanometer-scale; and ii) diffusion of soluble platinum species in the ionomer phase at the micrometer-scale, chemical reduction of these species by crossover H2 molecules and precipitation of platinum particles in the cathode ionomer phase. copyright The Electrochemical Society.

UR - https://www.scopus.com/pages/publications/33845268204

U2 - 10.1149/1.2214553

DO - 10.1149/1.2214553

M3 - Conference contribution

AN - SCOPUS:33845268204

SN - 1566774918

SN - 9781566774918

T3 - ECS Transactions

SP - 185

EP - 195

BT - Durability and Reliability of Low-Temperature Fuel Cells Systems

PB - Electrochemical Society Inc.

T2 - Symposium on Durability and Reliability of Low-Temperature Fuel Cells Systems - 208th Meeting of the Electrochemical Society

Y2 - 16 October 2005 through 21 October 2005

ER -

Coarsening of Pt nanoparticles in proton exchange membrane fuel cells upon potential cycling

Abstract

Publication series

Conference

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this