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A Novel Bimetallic Nickel–Molybdenum Carbide Nanowire Array for Efficient Hydrogen Evolution
ChemSusChem ( IF 7.5 ) Pub Date : 2018-07-12 , DOI: 10.1002/cssc.201801110 Lixia Guo 1 , Jianying Wang 1 , Xue Teng 1 , Yangyang Liu 1 , Xiaoming He 1 , Zuofeng Chen 1
ChemSusChem ( IF 7.5 ) Pub Date : 2018-07-12 , DOI: 10.1002/cssc.201801110 Lixia Guo 1 , Jianying Wang 1 , Xue Teng 1 , Yangyang Liu 1 , Xiaoming He 1 , Zuofeng Chen 1
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The design and fabrication of noble‐metal‐free hydrogenevolution electrocatalysts with high activity is significant to future renewable energy systems. In this work, self‐supported NiMo carbide nanowires on carbon cloth (Ni3Mo3C@NPC NWs/CC; NPC=N,P‐doped carbon) were developed through an electropolymerization‐assisted procedure. During the synthesis process, NiMoO4 nanowires were first grown on CC through a hydrothermal reaction that was free of any polymer binder such as Nafion. By use of electropolymerization, the as‐prepared NiMoO4 NWs/CC sample was then coated by a layer of polypyrole (PPy) that served as the carbon source for subsequent conversion into Ni3Mo3C@NPC NWs/CC by carbothermal reduction. The experimental results indicated that judicious choices of the amount of coated PPy and the pyrolysis temperature were essential for obtaining the pure‐phase, nanowire array structure of Ni3Mo3C@NPC NWs/CC. Benefitting from the pure phase of the bimetallic carbide, the unique architecture of the nanowire array, and its self‐supported nature, the optimized Ni3Mo3C@NPC NWs/CC electrode exhibited excellent performance in the hydrogen evolution reaction (HER) in both acidic and alkaline media. Low overpotentials of 161 and 215 mV were required to afford a high current density of 100 mA cm−2 toward the HER in acidic and alkaline media, respectively, and the catalytic activity was maintained for at least 48 h, which puts Ni3Mo3C@NPC NWs/CC among the best HER electrocatalysts based on metallic carbides yet reported.
中文翻译：
一种新型的双金属镍-碳化钼纳米线阵列，可有效释放氢气
高活性的无贵金属氢演化电催化剂的设计和制造对未来的可再生能源系统具有重要意义。在这项工作中，通过电聚合辅助程序开发了碳布上的自支撑NiMo碳化物纳米线（Ni 3 Mo 3 C @ NPC NWs / CC； NPC = N，P掺杂碳）。在合成过程中，NiMoO 4纳米线首先通过不含任何聚合物粘合剂（如Nafion）的水热反应在CC上生长。通过电聚合，将制备好的NiMoO 4 NWs / CC样品涂上一层聚吡咯（PPy），该层用作碳源，随后转化为Ni 3 Mo 3C @ NPC NWs / CC通过碳热还原。实验结果表明，明智的选择包被的PPy的量和热解温度对于获得Ni 3 Mo 3 C @ NPC NWs / CC的纯相纳米线阵列结构至关重要。得益于双金属碳化物的纯相，纳米线阵列的独特结构及其自支撑的特性，优化的Ni 3 Mo 3 C @ NPC NWs / CC电极在氢气中的析氢反应（HER）中表现出出色的性能。酸性和碱性介质。需要低过电位为161和215 mV，以提供100 mA cm -2的高电流密度Ni 3 Mo 3 C @ NPC NWs / CC分别在酸性和碱性介质中流向HER，并且催化活性至少维持48 h，这使Ni 3 Mo 3 C @ NPC NWs / CC成为基于金属碳化物的最佳HER电催化剂之一。
更新日期：2018-07-12
中文翻译：
一种新型的双金属镍-碳化钼纳米线阵列，可有效释放氢气
高活性的无贵金属氢演化电催化剂的设计和制造对未来的可再生能源系统具有重要意义。在这项工作中，通过电聚合辅助程序开发了碳布上的自支撑NiMo碳化物纳米线（Ni 3 Mo 3 C @ NPC NWs / CC； NPC = N，P掺杂碳）。在合成过程中，NiMoO 4纳米线首先通过不含任何聚合物粘合剂（如Nafion）的水热反应在CC上生长。通过电聚合，将制备好的NiMoO 4 NWs / CC样品涂上一层聚吡咯（PPy），该层用作碳源，随后转化为Ni 3 Mo 3C @ NPC NWs / CC通过碳热还原。实验结果表明，明智的选择包被的PPy的量和热解温度对于获得Ni 3 Mo 3 C @ NPC NWs / CC的纯相纳米线阵列结构至关重要。得益于双金属碳化物的纯相，纳米线阵列的独特结构及其自支撑的特性，优化的Ni 3 Mo 3 C @ NPC NWs / CC电极在氢气中的析氢反应（HER）中表现出出色的性能。酸性和碱性介质。需要低过电位为161和215 mV，以提供100 mA cm -2的高电流密度Ni 3 Mo 3 C @ NPC NWs / CC分别在酸性和碱性介质中流向HER，并且催化活性至少维持48 h，这使Ni 3 Mo 3 C @ NPC NWs / CC成为基于金属碳化物的最佳HER电催化剂之一。
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