This study presents a method for preparing tungsten-based electrocatalysts using a steam assisted carburization strategy. The WC/W₂C base with eutectoid-structured was prepared by a customized carburization strategy, and the WS₂/WO₃ heterojunction was successfully introduced by adjusting the steam content. Thanks to the synergies and electronic effects between the WS₂/WO₃ interface and the WC/W₂C base, the prepared catalyst exhibited excellent HER activity, with an overpotential of only 89 mV at a current density of 10 mA/cm², and the stability could be maintained for more than 60 hours. This study not only discusses the synthesis mechanism of WS₂/WO₃-WC/W₂C, but also provides a new idea for the study of high-performance tungsten-based HER catalysts, challenging the dominance of commercial Pt/C catalysts.

中文翻译：

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共构造的 WC/W2C 负载的 WS2/WO3 作为高效的析氢电催化剂

本研究提出了一种使用蒸汽辅助渗碳策略制备钨基电催化剂的方法。通过定制的渗碳策略制备了具有共构造结构的 WC/W₂C 基，并通过调节蒸汽含量成功引入了 WS₂/WO₃ 异质结。由于 WS₂/WO₃ 界面和 WC/W₂C 碱之间的协同作用和电子效应，所制备的催化剂表现出优异的 HER 活性，在 10 mA/cm² 的电流密度下，过电位仅为 89 mV，并且可以保持 60 小时以上的稳定性。本研究不仅讨论了 WS₂/WO_3-WC/W₂C 的合成机理，而且为高性能钨基 HER 催化剂的研究提供了新思路，挑战了商业 Pt/C 催化剂的主导地位。