Durability challenges and perspective in the development of PGM-free electrocatalysts for the oxygen reduction reaction

Martinez, Ulises; Babu, Siddharth Komini; Holby, Edward F.; Zelenay, Piotr

doi:10.1016/j.coelec.2018.04.010

Durability challenges and perspective in the development of PGM-free electrocatalysts for the oxygen reduction reaction

Journal Article · Thu Apr 26 00:00:00 EDT 2018 · Current Opinion in Electrochemistry

DOI:https://doi.org/10.1016/j.coelec.2018.04.010· OSTI ID:1459825

^[1]; ^[1]; ^[1]; Zelenay, Piotr ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Significant advancement in the development of highly active platinum group metal-free (PGM-free) electrocatalysts is giving rise to the possibility of a low-cost replacement for Pt electrocatalysts in polymer electrolyte fuel cells. However, before the successful implementation of PGM-free electrocatalysts, the challenge of long-term stability under fuel cell operating conditions needs to be addressed. In this paper, the current status of PGM-free electrocatalyst performance and durability is reviewed. A perspective on the route for the study of degradation mechanisms in PGM-free electrocatalysts in both half-cell and membrane electrode assembly environments is presented. The analysis of proposed degradation mechanisms suggests classification into two relevant length scales: atomic scale and macro/mesoscale. Finally, an overview of different characterization techniques (both experimental and theoretical) for studying different possible degradation mechanisms is outlined. Directly addressing the underlying mechanisms leading to loss of activity in PGM-free electrocatalysts will provide valuable insight necessary for the development of next-generation materials with improved durability capable of competing with Pt-based counterparts.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1459825

Report Number(s):: LA-UR--18-21822

Journal Information:: Current Opinion in Electrochemistry, Journal Name: Current Opinion in Electrochemistry Vol. 9; ISSN 2451-9103

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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