A Review of Pd-Based Electrocatalyst for the Ethanol Oxidation Reaction in Alkaline Medium

Abstract

Direct ethanol fuel cells are considered a promising power source for future portable electronic and automotive applications. This article reviewed the synthetic methods commonly used to prepare Pd-based catalysts for the ethanol electrooxidation in alkaline media. The progress in the mechanism studies of ethanol oxidation reaction (EOR) on Pd electrode in alkaline medium by cyclic voltammetry and electrochemical in situ FTIR spectroscopy was also reviewed. The recent studies revealed that the EOR is fairly complicated, and it is difficult in CC bond cleavage for the complete oxidation of ethanol to CO2, and ethanol is selectively oxidized to acetate on Pd-based catalysts in alkaline media. Overall, what is most important is to explore new Pd-based alloy catalysts with high ability to break the CC bond to promote complete oxidation of ethanol as well as increase the efficiency of DEFCs.

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO2 Hybrid Catalyst with High Performance in DAFC

“…Based on previous reports, − it is known that the MOR and EOR on Pd-based catalysts include the successive dehydrogenation of methanol or ethanol under alkaline conditions, resulting in the formation of CO-like poisoning intermediates and degradation of the electrocatalytic activity of Pd. In order to probe the poisoning durability of Pd/C, Pd/SnO 2 /C, Pd-SnO 2 /C, and Pd-(SnO 2 @C)/C catalysts, CO-stripping voltammograms were conducted in 1.0 M KOH solution to determine the oxidation potential of CO adsorbed on the catalyst surfaces.…”

Comprehensive Analysis of Trends and Emerging Technologies in All Types of Fuel Cells Based on a Computational Method

“…Cluster III-3 focuses on Pd-based catalysts for the electrooxidation of alcohol, especially ethanol, in alkali media [108,109]. Ethanol is also focused on as a promising energy carrier for its liquid state and energy density, along with methanol.…”