Abstract
AbstractDirect ethanol fuel cells (DEFCs) are a promising technology for generating electricity through the electro‐oxidation of liquid ethanol. Its implementation requires the development of anode catalysts capable of producing CO2 and yielding 12‐electron transfer through breaking the C−C bond of ethanol. Here, we presented comprehensive studies of the electrokinetics of CO2 generation on Pt/Rh/Sn ternary catalysts. Our studies showed that the triphasic PtRhOx–SnO2 catalysts with a partially oxidized Pt and Rh core and a SnO2 shell, validated by X‐ray absorption analyses and scanning transmission electron microscope‐electron energy loss spectroscopy line scans, coincided with a 2.5‐fold increase in the CO2 generation rate towards ethanol oxidation reaction, compared with the biphasic PtRh‐SnO2 catalysts with a metallic PtRh alloy core and commercial Pt. These studies provided insight into the design of a new genre of electrocatalysts with a partially oxidized noble metal.
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