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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >3D hierarchical V-Ni-based nitride heterostructure as a highly efficient pH-universal electrocatalyst for the hydrogen evolution reaction
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3D hierarchical V-Ni-based nitride heterostructure as a highly efficient pH-universal electrocatalyst for the hydrogen evolution reaction

机译：3D基于等级V-Ni的氮化物异质结构作为高效的pH通用电催化剂，用于氢化反应

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摘要

Exploring inexpensive and efficient electrocatalysts for the hydrogen evolution reaction (HER) in a wide pH range is crucial for the development of sustainable energy applications. Herein, a novel 3D hierarchical V-Ni-based nitride heterojunction on carbon cloth (VN@Ni3N-Ni/CC) was designed and fabricated as a promising pH-universal HER electrocatalyst through the controllable nitridation of the corresponding V-Ni-O/CC precursor. A series of experimental parameters were tested to adjust the nanostructure of the material and to gain insight into the relationship between its structure and activity. The VN@Ni3N-Ni/CC sample produced under optimized conditions showed excellent catalytic activity and stability over a wide pH range with onset potentials of 8, 23 and 32 mV and Tafel slopes of 40, 97 and 79 mV dec(-1) in 1.0 M KOH, 1.0 M PBS and 0.5 M H2SO4 electrolytes, respectively. Notably, with regards to catalytic activity, our VN@Ni3N-Ni/CC sample outperformed most currently available non-noble metal catalysts, and was also found to be superior to Pt-C/CC at certain current density intervals in alkaline and neutral media. The outstanding performance of VN@Ni3N-Ni/CC was mainly attributed to the highly active heterointerfaces, excellent electronic conductivity and facilitated mass transport of its 3D hierarchical framework. We expect the results of this work to help in the design and engineering of other heterojunction materials based on hybrids of early- and late-transition metals, and hence yield materials that may be used as highly efficient catalysts for various applications.
机译：在宽的pH范围内探索赋予氢气进化反应（她）的廉价和有效的电催化剂对于可持续能源应用的发展至关重要。在此，通过可控氮化的相应V-Ni-O /的可控氮化设计并制造在碳布（VN @ Ni3N-Ni / Cc）上的新型3D分层V-Ni族氮化物异质结，作为有前途的pH-​​通用的电催化剂。 CC前体。测试了一系列实验参数以调节材料的纳米结构，并深入了解其结构和活性之间的关系。在优化条件下产生的VN @ Ni3N-Ni / CC样品在宽的pH范围内显示出优异的催化活性和稳定性，其发作电位为8,23和32mV和40,97和79mV Dec（-1）中的Tafel斜率1.0 m KOH，1.0 m PBS和0.5M H2SO4电解质。值得注意的是，关于催化活性，我们的VN @ Ni3N-Ni / CC样品优于最目前可用的非贵金属催化剂，并且还发现在碱性和中性介质的某些电流密度间隔下优于Pt-C / Cc 。 VN @ Ni3N-Ni / Cc的出色性能主要归因于高活性的异料，其3D层级框架的高度活性异料，优异的电子电导率和促进的大规模运输。我们预计这项工作的结果可以帮助基于早期和后过渡金属的杂种的其他异质结材料的设计和工程，因此可以用作各种应用的高效催化剂的产量材料。

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    Dong Xue; Yan Haijing; Jiao Yanqing; Guo Dezheng; Wu Aiping; Yang Ganceng; Shi Xia; Tian Chungui; Fu Honggang;

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    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Harbin 150080 Heilongjiang Peoples R China;

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  • 中图分类 工程材料学;
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