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首页> 外文期刊>Advanced Functional Materials >Oxygen-Incorporated NiMoP Nanotube Arrays as Efficient Bifunctional Electrocatalysts For Urea-Assisted Energy-Saving Hydrogen Production in Alkaline Electrolyte
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Oxygen-Incorporated NiMoP Nanotube Arrays as Efficient Bifunctional Electrocatalysts For Urea-Assisted Energy-Saving Hydrogen Production in Alkaline Electrolyte

机译：氧气掺入的尼莫纳米管阵列作为碱性电解质尿素辅助节能氢生产的有效双官能电催化剂

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摘要

To couple hydrogen evolution reaction (HER) with urea oxidation reaction (UOR) is a promising approach to produce H-2 with reduced energy consumption. However, the development of a low-cost and high-performance bifunctional electrocatalyst toward HER and UOR is still a challenge. In this work, oxygen-incorporated nickel molybdenum phosphide nanotube arrays are synthesized on nickel foam (O-NiMoP/NF) via electrodeposition accompanied with in-situ template etching. Benefiting from the modulated electronic structure and the nanotube array architecture of O-NiMoP, the self-supporting O-NiMoP/NF electrodes demonstrate highly efficient bifunctional catalytic activity toward HER and UOR. Particularly, in the HER and UOR (HER||UOR) coupled system for H-2 production, a significantly reduced cell voltage of 1.55 V is obtained at the current density of 50 mA cm(-2), which is about 300 mV lower than that of the conventional water electrolysis. Density functional theory calculations reveal that the remarkable HER and UOR activities originated from the Ni sites with the modulated electronic environment induced by Mo, P and O atoms, which facilitate the water dissociation during HER and balance the adsorption/desorption of the intermediates during UOR. The development of Ni-based phosphides nanotube arrays as a bifunctional electrocatalyst in HER||OER system provides a new approach enabling energy-saving H-2 production.
机译：将氢进化反应（她）与尿素氧化反应（UOR）耦合（UOR）是产生H-2的有希望的方法，其能量消耗降低。然而，对她和UOR的低成本和高性能双功能电催化的开发仍然是一项挑战。在这项工作中，通过电沉积在原位模板蚀刻中通过电沉积在镍泡沫（O-Nimop / NF）上合成氧气掺入的镍钼纳米管阵列。从调制的电子结构和O-Nimop的纳米管阵列架构受益，自支撑O-Nimop / NF电极向她和UOR表现出高效的双官能催化活性。特别是，在H-2生产的HER和UOR（HER || UOR）耦合系统中，在50 mA cm（-2）的电流密度下获得1.55V的显着降低的电池电压，下降约300mV比传统的水电解。密度函数理论计算揭示了来自Mo，P和O原子诱导的调制电子环境的显着的她和UOR的活动，其促进了她们期间的水解离，并且在UOR期间平衡中间体的吸附/解吸。在其|| OER系统中作为双官能电催化剂的Ni基磷酸纳米管阵列的发展提供了一种新的方法，使能节能H-2的生产。

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  • 来源
    《Advanced Functional Materials》 |2021年第43期|2104951.1-2104951.9|共9页
  • 作者

    Jiang Hao; Sun Mingzi; Wu Shuilin; Huang Bolong; Lee Chun-Sing; Zhang Wenjun;

  • 作者单位

    City Univ Hong Kong Ctr Super Diamond & Adv Films 83 Tat Chee Ave Hong Kong Sar Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn 83 Tat Chee Ave Hong Kong Sar Peoples R China;

    Hong Kong Polytechn Univ Dept Appl Biol & Chem Technol Kowloon Hong Kong Sar Peoples R China;

    City Univ Hong Kong Ctr Super Diamond & Adv Films 83 Tat Chee Ave Hong Kong Sar Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn 83 Tat Chee Ave Hong Kong Sar Peoples R China;

    Hong Kong Polytechn Univ Dept Appl Biol & Chem Technol Kowloon Hong Kong Sar Peoples R China;

    City Univ Hong Kong Ctr Super Diamond & Adv Films 83 Tat Chee Ave Hong Kong Sar Peoples R China|City Univ Hong Kong Dept Chem 83 Tat Chee Ave Hong Kong Sar Peoples R China;

    City Univ Hong Kong Ctr Super Diamond & Adv Films 83 Tat Chee Ave Hong Kong Sar Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn 83 Tat Chee Ave Hong Kong Sar Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrocatalysis; hydrogen evolution reaction; nanotube arrays; oxygen-incorporated nickel molybdenum phosphide; urea oxidation reaction;

    机译：电催化;氢气进化反应;纳米管阵列;氧气掺入镍钼磷化物;尿素氧化反应;

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