Tungsten Molybdenum Carbide for Electrocatalytic Oxidation of Methanol

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Abstract
The electrocatalytic activity of WC and tungsten based double carbides are investigated mainly with the focus on methanol oxidation in sulfuric acid. Only Mo is found to be able to promote methanol oxidation activity. After optimizing the preparation method of carbides, the most active catalyst for methanol oxidation is found to be (W, Mo)C synthesized at 700°C with the atomic ratio for . This formulation shows a specific activity of 5 mA/g catalyst at 0.5V vs. RHE in at 50°C. Corrosion current is almost negligible at a potential up to 0.55V. It is also found that the presence of oxygen in the carbide increases the hydrogen evolution activity, while it is not made clear for methanol oxidation.

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