Journal
APPLIED CATALYSIS A-GENERAL
Volume 352, Issue 1-2, Pages 145-151Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2008.10.014
Keywords
PtRh catalysts; Cyclohexane oxidation; Fuel cells; Cyclic hydrocarbons; Benzene
Categories
Funding
- New & Renewable Energy RD program [2005-N-FC03-P-01-0-000]
- Korea Ministry of Commerce, Industry and Energy (MOCIE),
- Korea Research Foundation
- Korean Government (MOEHRD) [KRF2007-313-DO0148]
Ask authors/readers for more resources
Electrochemical dehydrogenative oxidation of cyclohexane to benzene was studied over carbon-supported PtRh (PtRh/C) electrocatalysts, which were prepared with different Pt:Rh atomic ratios from 4:1 to 1:4 using a borohydride reduction method combined with freeze-drying procedure at room temperature. The bimetallic PtRh/C catalysts were characterized by various physicochemical analyses such as X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray absorption-near-edge spectroscopy (XANES). The variation of Rh content over the PtRh alloy formation caused significant structural and electronic modifications on the catalyst phase, which could be associated with consistent changes in electrocatalytic activities over a polymer electrolyte membrane (PEM) fuel cell. The Pt4Rh1/C catalyst as the anode electrocatalyst showed a maximum power density of ca. 8.5 MW cm(-2). Here, both the structural modification via lattice parameter change and the electronic modification through charge transfer from Rh to Pt could kinetically facilitate the sluggish electrode reaction with an increased exchange current density on the dehydrogenative electrooxidation of cyclohexane to benzene over the PtRh/C anodes of cyclohexane fuel cell. (C) 2008 Elsevier B.V. All rights reserved.
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