Electrochemical Characterization of Various Carbon-Supported Pt-Pd Bimetallic Electrocatalysts Prepared by Electroless Deposition

摘要

Bimetallic catalysts have become increasingly more important in applications of heterogeneous catalysis ranging from petroleum reforming to fuel cells (1-4). Research has shown that bimetallic catalysts often exhibit notably different catalytic and chemical properties rather than their corresponding monometallic components (5). Bimetallic systems often provide enhanced selectivity, stability, and/or activity (6,7). Several mechanisms to explain the catalytic properties of bimetallic catalysts have been proposed, including geometric or ensemble effects (8), formation of bifunctional surfaces (9), and electronic modification of surface sites (10).