Journal
ELECTROCHIMICA ACTA
Volume 83, Issue -, Pages 354-358Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.06.111
Keywords
Formic acid electrochemical-oxidation; XPS; Density of state; Layered bimetallic surface; Direct formic acid fuel cell
Categories
Funding
- National Science Foundation [38135136, CBET-1033601, DMR-9503304, CHE-1048600]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1033601] Funding Source: National Science Foundation
Ask authors/readers for more resources
Vapor deposition method is used to prepare layered Pd-Cu bimetallic model catalytic surfaces, with different thickness of Pd, supported on glassy carbon. Charge transfer from Pd to Cu produces a positive binding energy (BE) shift for the overlayer Pd 3d and an opposite shift for Cu 2p as measured by X-ray photoelectron spectroscopy (XPS). Similarly, the d-band center moves away from the Fermi level as the thickness of Pd decreased for these bimetallic materials. This electronic perturbation of the Pd-Cu systems results in a drastic increase in current density and an improved stability for formic acid electro-oxidation. Our findings indicate that layered Pd-Cu bimetallic surfaces with Pd layers thicker than 1 nm do not form a surface alloy at room temperature and are better electrocatalytic materials than Bulk Pd and could be used to enhance direct formic acid fuel cell (DFAFC) performance. Published by Elsevier Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available