硼依赖的钼硼化物析氢反应电催化剂。
Boron-Dependency of Molybdenum Boride Electrocatalysts for the Hydrogen Evolution Reaction.
机构信息
Department of Chemistry, University of California, Riverside, Riverside, CA, 92521, USA.
Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA, 92521, USA.
出版信息
Angew Chem Int Ed Engl. 2017 May 8;56(20):5575-5578. doi: 10.1002/anie.201611756. Epub 2017 Apr 10.
Molybdenum-based materials have been considered as alternative catalysts to noble metals, such as platinum, for the hydrogen evolution reaction (HER). We have synthesized four binary bulk molybdenum borides Mo B, α-MoB, β-MoB, and MoB by arc-melting. All four phases were tested for their electrocatalytic activity (linear sweep voltammetry) and stability (cyclic voltammetry) with respect to the HER in acidic conditions. Three of these phases were studied for their HER activity and by X-ray photoelectron spectroscopy (XPS) for the first time; MoB and β-MoB show excellent activity in the same range as the recently reported α-MoB and β-Mo C phases, while the molybdenum richest phase Mo B show significantly lower HER activity, indicating a strong boron-dependency of these borides for the HER. In addition, MoB and β-MoB show long-term cycle stability in acidic solution.
钼基材料被认为是替代贵金属（如铂）用于析氢反应（HER）的催化剂。我们通过电弧熔炼合成了四种二元块状钼硼化物 MoB、α-MoB、β-MoB 和 MoB。所有这四个相都在酸性条件下进行了析氢反应的电催化活性（线性扫描伏安法）和稳定性（循环伏安法）测试。其中三种相首次通过 X 射线光电子能谱（XPS）研究了其析氢活性；MoB 和 β-MoB 的活性与最近报道的α-MoB 和 β-MoC 相处于同一水平，而富钼相 MoB 的析氢活性则明显较低，表明这些硼化物对析氢反应具有很强的硼依赖性。此外，MoB 和 β-MoB 在酸性溶液中具有长期的循环稳定性。
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