Bimetallic nickel-molybdenum/tungsten nanoalloys for high-efficiency overall hydrazine splitting in seawater electrolytes
Source abstract
Abstract
利用水合肼氧化反应(HzOR)取代缓慢的析氧反应(OER)是一种可以在海水裂解中长期产生氢气并抑制不利的析氯反应(ClER)的方法. 然而, 很少有催化剂能够满足在双电极系统中同时呈现出优异的析氢反应(HER)和HzOR以达到较低的电池电压的要求. 在此, 我们报道了双金属Ni4Mo/Ni4W纳米合金作为双功能催化剂, 该催化剂对HER(−7 mV, 10 mA cm−2)和HzOR (−16 mV, 10 mA cm−2)具有显著的催化活性. 在1.0 mol L−1 KOH/2.0 mol L−1 NaCl/0.1 mol L−1 N2H4电解液中, 双电极系统需要34, 295和548 mV的低电池电压就能达到10, 100和200 mA cm−2. 密度泛函理论计算表明, Ni−Mo/W耦合不仅可以降低水解离的自由能和氢的吸附/脱附, 而且可以优化吸附水合肼中间体的脱氢动力学.
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Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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