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首页> 外文期刊>Catalysis science & technology >Terephthalic acid induced binder-free NiCoP-carbon nanocomposite for highly efficient electrocatalysis of hydrogen evolution reaction
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Terephthalic acid induced binder-free NiCoP-carbon nanocomposite for highly efficient electrocatalysis of hydrogen evolution reaction

机译：对苯二甲酸诱导binder-free NiCoP-carbon纳米复合材料的高效电催化作用的氢进化的反应

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摘要

The design and synthesis of electrocatalysts with high efficiency, long-term stability, and low-cost for hydrogen evolution reaction (HER) in the water electrolysis process is urgently desired for large-scale and effective applications of renewable energy. Herein, a binder-free NiCoP-carbon nanocomposite (denoted as NiCoP-C(TPA)) film with a unique nanostructure was fabricated on nickel foam (NF) for the first time by the deposition of a terephthalic acid induced NiCo bimetallic compound precursor film on NF via hydrothermal synthesis, followed by calcination in Ar atmosphere and phosphorization treatment with NaH2PO2. In the obtained NiCoP-C(TPA) electrocatalyst, the bimetallic phosphide nanoparticles were well combined with the graphitic carbon. It was found that the bimetallic NiCo alloy was formed in the carbonization process, which affected the performance of the final catalyst. As a result, the NiCoP-C(TPA) electrocatalyst had a much higher activity than the monometallic phosphides of NiP-C(TPA)/NF and CoP-C(TPA)/NF, and the NiCoP-C(TPA)/NF electrode exhibited an overpotential as low as 78 mV at a current density of 10 mA cm(-2) with a small Tafel slope of 73.4 mV dec(-1), a faradaic efficiency of similar to 94%, and long-term stability at high current densities in an alkaline electrolyte. Meanwhile, the NiCoP-C(TPA)/NF electrode also exhibited superior HER performance in an acidic electrolyte with an overpotential of 94 mV@10 mA cm(-2), a Tafel slope of 81.1 mV dec(-1), and long-term stability, although in a neutral electrolyte, a relatively high overpotential of 248 mV@10 mA cm(-2) with a high Tafel slope of 112.5 mV dec(-1) was obtained. It is expected to provide a novel synthetic method by using an organic solid acid to obtain high-performance bimetallic phosphide based electrocatalysts with special nanostructure for HER in the water splitting process.
机译：electrocatalysts的设计和合成效率高、长期稳定性、和低成本的析氢反应(她)水的电解过程是迫切的所需的大规模的和有效的可再生能源的应用。binder-free NiCoP-carbon纳米复合材料(表示NiCoP-C (TPA))电影独特的纳米结构在泡沫镍捏造(NF)第一时间的沉积对苯二甲酸诱导尼科双金属复合前驱膜通过水热合成NF,紧随其后在基于“增大化现实”技术的大气和磷化作用煅烧NaH2PO2治疗。NiCoP-C (TPA) electrocatalyst,双金属磷化纳米粒子结合的非常好石墨碳。双金属尼科合金形成的碳化过程,影响了最后的催化剂的性能。NiCoP-C (TPA) electrocatalyst得多活动高于单本位制的磷化NiP-C (TPA) / NF和CoP-C (TPA) / NF和NiCoP-C (TPA) / NF电极表现出一个过电压低至78 mV的电流马10厘米(2)密度小塔费尔斜率73.4 mV 12月(1),感应电流的效率类似于94%,长期稳定在高电流密度在碱性电解液。与此同时,NiCoP-C (TPA) / NF电极表现出优越的性能在酸性94马mV@10电解质的过电压厘米(2),塔费尔斜率为81.1 mV 12月(1)长期稳定,尽管在一个中立的电解质,相对高的过电压248马mV@10厘米(2)高的塔菲尔的斜率(1) 12月112.5 mV。通过提供一种新颖的合成方法有机固体酸获得高性能基于双金属磷化electrocatalysts特殊的纳米结构为她在水里分裂的过程。

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