Investigation of Pt/C and Pt-Ru/C Mixed Catalyst for DME Oxidation in Direct Dimethyl Ether Fuel Cells
Year: 2020
Type: article
Abstract: The performance of Pt/C and Pt-Ru/C mixed catalyst has been studied for dimethyl ether (DME) oxidation in direct dimethyl ether fuel cells (DDFCs). Transmission Electron Microscopy (TEM) characterizations show that Pt and Pt-Ru particles (about 3.0 nm) are highly dispersed on their supports. The electrochemical activity of mixed catalyst was evaluated by polarization curve, amperometric current density - time technique, and electrochemical impedance spectroscopy (EIS). The results show that the activity of mixed catalyst is better than Pt/C toward DME oxidation. Pt-Ru/C in the mixed catalyst is helpful for reducing the catalyst poisoning effect, and simultaneously, Pt/C in the mixed catalyst can provide continuous Pt active sites for DME dehydrogenation. Too much Pt-Ru can reduce the catalytic activity. The optimal Pt-Ru content is 3.5 mg cm -2 Pt and 0.5 mg cm -2 Pt-Ru (metal loading) in anode catalyst layer.
DOI: 10.20964/2020.10.27
Authors: Lehong Xing, Yixin Wang, Xinting Shi, Rui Dong, Lin Wu
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,670
OpenAlex ID: W4252829602