Carbon-supported Pd-Co alloy electrocatalysts for methanol tolerant oxygen reduction

Wenming Wang, Hui Yang, Jianyu Cao, Qinghong Huang, Zhiqing Zou, Baojia Xia

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Carbon-supported Pd-Co bimetallic nanoparticle electrocatalysts of different Pd/Co atomic ratios were prepared by a modified polyol reduction. An activity comparison of the oxygen reduction reaction (ORR) on Pd-Co alloy catalysts with the same Pd loading, the same fee disordered structure and a similar particle size has been made. Both composition and structure of Pd-Co alloys have a significant influence on the ORR. The change in the ORR activity with different Pd/Co compositions is correlated to their structural parameter. The maximum ORR activity for Pd2Co/C catalyst heattreated at 500 °C is attributed to an optimal alloy composition and to a favorable Pd-Pd mean interatomic distance caused by alloy formation. Moreover, the Pd-Co alloy catalyst exhibited much higher ORR activity man the Pt/C catalyst in the presence of methanol, thus it may function as a methanol-tolerant ORR catalyst in a direct methanol fuel cell.

Original languageEnglish
Title of host publicationECS Transactions - 7th Symposium Devoted to Proton Exchange Membrane Fuel Cells
Pages1379-1386
Number of pages8
Edition1 PART 2
DOIs
StatePublished - 2007
Externally publishedYes
Event7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting - Washington, DC, United States
Duration: 7 Oct 200712 Oct 2007

Publication series

NameECS Transactions
Number1 PART 2
Volume11
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference7th Symposium Devoted to Proton Exchange Membrane Fuel Cells - 212th ECS Meeting
Country/TerritoryUnited States
CityWashington, DC
Period7/10/0712/10/07

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