Work

Pt Submonolayers on Ru Nanoparticles: A Novel Low Pt Loading, High CO Tolerance Fuel Cell Electrocatalyst

Year: 2001

Type: article

Abstract: A new method for the preparation of Pt-Ru and similar bimetallic electrocatalysts is reported. It involves a spontaneous deposition of Pt submonolayers on metallic Ru nanoparticles, which yields electrocatalysts with a considerably lower Pt loading and higher CO tolerance than the commercial Pt-Ru alloy electrocatalysts. The method offers a unique possibility to place the Pt atoms onto the surface of Ru nanoparticles, which very likely makes almost all of them available for hydrogen oxidation, in contrast to the Pt-Ru alloy catalysts that have Pt throughout the nanoparticles. Thus, an ultimate reduction of Pt loading can be achieved. It also facilitates a fine-tuning of the electrocatalyst's activity and selectivity by changing the coverage (the cluster size) of Pt for optimal performance under required CO tolerance levels. © 2001 The Electrochemical Society. All rights reserved.

Source: Electrochemical and Solid-State Letters

DOI: 10.1149/1.1414943

Authors: S. R. Brankovic, J. X. Wang, R. R. Adžić

Institution: Brookhaven National Laboratory

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funder: U.S. Department of Energy