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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >In situ fabrication of dynamic self-optimizing Ni3S2 nanosheets as an efficient catalyst for the oxygen evolution reaction
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In situ fabrication of dynamic self-optimizing Ni3S2 nanosheets as an efficient catalyst for the oxygen evolution reaction

机译：原位制造动态自优化Ni3S2纳米片作为氧气进化反应的有效催化剂

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摘要

In this work, a dynamic self-optimizing material consisting of nickel-sulfide nanosheets anchored onto Ni foam (DSO-Ni3S2-NF) as the model material was constructed using a hydrothermal method, and its electrocatalytic performance for oxygen evolution was evaluated. It was found that the electrocatalytic activity of the dynamic self-optimizing (DSO) 25 h-Ni3S2-NF for oxygen evolution is significantly enhanced compared with that of pristine 0 h-Ni3S2-NF since the formed oxide layer evolves into new active sites and the specific process of activity optimization was explored dynamically. The best oxygen evolution reaction (OER) performance was achieved by 25 h-Ni3S2-NF catalyst, which required merely 241 mV overpotential to deliver a current density of 20 mA cm(-2), and its Tafel slope was as low as similar to 40 mV dec(-1), which was superior to most nickel-based catalysts, in 1 M KOH electrolyte. The current density was found to be increased gradually at the same potential and the stability test curves were steady with ignorable decline, showing that the promising strategy of the preparation of a dynamic self-optimizing pre-catalyst may open a new pathway to prepare low-cost, high-performance and stable water splitting catalysts.
机译：在这项工作中，使用水热法根据模型材料构建了由锚定的Ni泡沫（DSO-Ni3S2-NF）上的镍硫化物纳米片组成的动态自优化材料，并评估其用于氧化的电催化性能。结果发现，与原始0H-Ni3S2-NF相比，动态自我优化（DSO）25H-Ni3S2-NF的电催化活性与原始0 H-Ni3S2-NF相比显着提高，因为形成为新的活性位点和氧化物动态探讨了活动优化的具体过程。 25 H-Ni3S2-NF催化剂实现了最佳的氧气进化反应（OER）性能，该催化剂仅仅需要241mV过电位，以提供20 mA cm（-2）的电流密度，其TAFEL斜率与...类似40mV DEC（-1），其优于大多数基于镍基催化剂，在1M KOH电解质中。发现电流密度在相同的电位逐渐增加，稳定性试验曲线随着无知的下降稳定，表明动态自优化预催化剂的制备的有希望的策略可以打开新的途径以制备低成本，高性能和稳定的水分裂催化剂。

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