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.

中文翻译：

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用离子液体改性的WC用于碱性溶液中的析氢反应

摘要 高纯度氢气的来源对于克服使用化石燃料消耗获得一次能源的问题至关重要。电解水是满足这一需求的重要替代方案，因为它可以与可再生能源结合并产生纯氢。对于这项技术，低温设备需要新的非贵重电催化剂材料，以降低其成本并具有可接受的活性和耐久性。从这个意义上讲，我们在此介绍了由六方 WC 粉末和不同的吡啶基离子液体生成的几种复合材料的析氢反应 (HER) 的制备和性能。差示电化学质谱法 (DEMS) 不仅用于获得活性的准确测量值，还用于获得有关基础介质中研究材料表面 HER 动力学和机理的可靠信息。最后，证明离子液体的存在对生成的复合材料的粒度分布起着重要作用，因此对它们的电容、耐久性和催化活性起着重要作用。