| 具有协同电子结构和形貌调控功能的三元Co1-xVxP纳米针阵列在大电流下的析氢性能研究 |
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| 作者姓名： | 杨明阳 商超群 李菲菲? 刘琛 王振宇 顾帅 刘地 曹鲁杰 张钧君 卢周广 潘晖 |
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| 作者单位： | Department of Materials Science and Engineering;Institute of Applied Physics and Materials Engineering;Shenzhen Key Laboratory of Polymer Science and Technology;International Academy of Optoelectronics at Zhaoqing;Department of Physics and Chemistry |
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| 基金项目： | the National Natural Science Foundation of China(21671096,21603094 and21905180);the Natural Science Foundation of Guangdong Province(2018B030322001 and 2018A030310225);Shenzhen Peacock Plan(KQTD2016022620054656);Shenzhen Key Laboratory Project(ZDSYS201603311013489);the Basic Research Project of the Science and Technology Innovation Commission of Shenzhen(JCYJ20190809115413414);the Science and Technology Development Fund from Macao SAR(FDCT–0102/2019/A2,FDCT–0035/2019/AGJ and FDCT–0154/2019/A3);the Multi-Year Research Grants(MYRG2017–00027–FST and MYRG2018–00003–IAPME)from the University of Macao。 |
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| 摘 要： | 制备具有大电流析氢性能的非贵金属电催化剂是一个巨大挑战.协同调控催化剂的电子结构和形貌能够增强其本征催化能力和增加活性位点,被认为是提高催化性能的有效方法.本文以具有协同电子结构和形貌调控功能的三元Co1-xVxP纳米针阵列作为碱性析氢的高效电催化剂.实验和理论计算结果表明,其优异的催化性能来源于物理化学性质的提高、活性表面积的增加及反应动力学的加速.此外,组装的(NF@Co1-xVx–HNNs(+)||NF@Co1-xVxP(-))电解池在1.58、1.75和1.92 V的电压下,能够分别得到10、100和300 mA cm-2的电流密度.
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| 关 键 词： | 形貌调控 催化能力 反应动力学 电解池 电催化剂 析氢性能 纳米针 协同调控 |
Synergistic electronic and morphological modulation on ternary Co1-xVxP nanoneedle arrays for hydrogen evolution reaction with large current density |
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| Authors: | Mingyang Yang Chaoqun Shang Feifei Li Chen Liu Zhenyu Wang Shuai Gu Di Liu Lujie Cao Junjun Zhang Zhouguang Lu Hui Pan |
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| Affiliation: | (Department of Materials Science and Engineering,Shenzhen Key Laboratory of Hydrogen Energy,Southern University of Science and Technology,Shenzhen 518055,China;Institute of Applied Physics and Materials Engineering,University of Macao,Macao SAR,China;Shenzhen Key Laboratory of Polymer Science and Technology,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China;International Academy of Optoelectronics at Zhaoqing,South China Normal University,Zhaoqing 526060,China;Department of Physics and Chemistry,Faculty of Science and Technology,University of Macao,Macao SAR,China) |
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| Abstract: | It is a great challenge to prepare non-noble metal electrocatalysts toward hydrogen evolution reaction(HER)with large current density.Synergistic electronic and morphological structures of the catalyst have been considered as an effective method to improve the catalytic performance,due to the enhanced intrinsic activity and enlarged accessible active sites.Herein,we present novel ternary Co1-xVxP nanoneedle arrays with modulated electronic and morphological structures as an electrocatalyst for highly efficient HER in alkaline solution.The NF@Co1-xVxP catalyst shows a remarkable catalytic ability with low overpotentials of 46 and 226 mV at current densities of 10 and 400 mA cm-2,respectively,as well as a small Tafel slope and superior stability.Combining the experimental and computational study,the excellent catalytic performance was attributed to the improved physical and chemical properties(conductivity and surface activity),large active surface area,and fast reaction kinetics.Furthermore,the assembled Co–V based electrolyzer(NF@Co1-xVx–HNNs(+)||NF@Co1-xVxP(-))delivers small full-cell voltages of 1.58,1.75,and 1.92 V at 10,100,and 300 mA cm-2,respectively.Our findings provide a systematic understanding on the V–incorporation strategy to promote highly efficient ternary electrocatalysts via synergistic control of morphology and electronic structures. |
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| Keywords: | modulated morphology and electronic structures ternary Co1-xVxP hydrogen evolution reaction overall water splitting |
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