Multiple crystal phases of intermetallic tungsten borides and phase-dependent electrocatalytic property for hydrogen evolution
2020
Li, Qiuju | Wang, Lina | Ai, Xuan | Chen, Hui | Zou, Jiayun | Li, Guo-Dong | Zou, Xiaoxin
Four stoichiometric W–B intermetallic phases, including W₂B, WB, WB₂ and WB₃, are synthesized, and their hydrogen-evolution electrocatalytic properties and electronic structures are investigated comparatively. The electrocatalytic activity for the hydrogen evolution reaction is found to first increase from W₂B to WB₂ and then decrease; and this activity trend can be rationalized based on their different degrees of hybridization between d orbitals of W and sp orbitals of B.
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