Electrochemical half-cell studies on industrial electrocatalysts contribute significantly towards our understanding of fuel cell processes. However, the study of complex, often overlapping reactions using standard methods is limited to the interpretation of a single electrode current. Presented here are details of the design, construction and characterisation of a differential electrochemical mass spectrometer (DEMS) that enables the in-situ elucidation of electrode currents. The capability of the instrument is demonstrated in two studies. In the first, DEMS is used resolve the conversion of the methanol oxidation reaction to carbon dioxide on high surface area carbon (HSAC) supported Pt and PtRu catalysts, whilst the second focuses on the corrosion of industrial HSACs, separating partial and complete oxidation processes. Despite that both systems have long since been studied, new insights and understanding can be obtained using DEMS.
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Electrochemical half-cell studies on industrial electrocatalysts contribute significantly towards our understanding of fuel cell processes. However, the study of complex, often overlapping reactions using standard methods is limited to the interpretation of a single electrode current. Presented here are details of the design, construction and characterisation of a differential electrochemical mass spectrometer (DEMS) that enables the in-situ elucidation of electrode currents. The capability of t...
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