Abstract
A source of high-purity hydrogen is essential to overcome the problem of using fossil fuel consumption to obtain primary energy. Electrolysis of water arises as an important alternative to fulfil this necessity since it can be coupled to renewable sources and generates pure hydrogen. For this technology, low-temperature devices need new non-noble electrocatalyst materials that reduce its cost and perform with an acceptable activity and durability. In this sense, we present here the preparation and performance towards the hydrogen evolution reaction (HER) of several composite materials generated from hexagonal WC powder and different pyridinium-based ionic liquids. Differential electrochemical mass spectrometry (DEMS) is used to obtain not only an accurate measurement of the activity but also reliable information about kinetics and mechanism of HER on the surface of the studied materials in basic medium. Finally, it is proved that the presence of ionic liquids play an important role in the particle size distribution of the generated composite material and, therefore, in their capacitance, durability and catalytic activity.
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