高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (8): 20230057.doi: 10.7503/cjcu20230057

• 物理化学 • 上一篇    下一篇

Ni/TiO2-VO纳米线自支撑薄膜的界面工程与电催化产氢性能

赵环宇1, 米洪田2, 常月琪2(), 周冬雪2, 张立国2, 杨穆2()   

  1. 1.北京科技大学新材料技术研究院,材料科学与工程实验教学中心
    2.材料科学与工程学院, 北京 100083
  • 收稿日期:2023-02-11 出版日期:2023-08-10 发布日期:2023-05-08
  • 通讯作者: 常月琪,杨穆 E-mail:D202210262@xs.ustb.edu.cn;yangmu@ustb.edu.cn
  • 基金资助:
    北京自然科学基金(2212038);广东省自然科学基金(2022A1515011852);佛山市科技创新专项资金项目(BK21BE008)

Interfacial Engineering and Electrocatalytic Hydrogen Evolution Performance of Ni/TiO2-VO Nanowires Self-supporting Thin Films

ZHAO Huanyu1, MI Hongtian2, CHANG Yueqi2(), ZHOU Dongxue2, ZHANG Liguo2, YANG Mu2()   

  1. 1.Materials Science and Engineering Experimental Teaching Center,Institute for Advanced Materials and Technology
    2.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Received:2023-02-11 Online:2023-08-10 Published:2023-05-08
  • Contact: CHANG Yueqi, YANG Mu E-mail:D202210262@xs.ustb.edu.cn;yangmu@ustb.edu.cn
  • Supported by:
    the Beijing Natural Science Foundation, China(2212038);the Natural Science Foundation of Guangdong Province, China(2022A1515011852);the Scientific and Technological Innovation Foundation of Foshan City, China(BK21BE008)

摘要:

将采用水热法合成的钛酸钠纳米线自支撑薄膜通过离子交换及高温H2/Ar(H2的体积分数5%)混合气还原, 构筑了负载Ni纳米颗粒的富氧空位的TiO2纳米线自支撑薄膜材料(Ni/TiO2-VO NFFs). 在H2/Ar混合气 高温还原过程中, TiO2纳米线产生的大量氧空位和低配位的Ti3+可以调节TiO2的电导率. Ni与TiO2在界面的强相互作用优化了电子结构, 促进了电化学析氢反应(HER)活性的提升. 密度泛函理论(DFT)计算结果显示, Ni/TiO2-VO NFFs具有更优的氢吸附吉布斯自由能(ΔGH*). 在1 mol/L KOH溶液中, Ni/ TiO2-VO NFFs在10 mA/cm2电流密度下的过电位为67 mV, 且具有优异的稳定性, 在电催化HER领域中显示出巨大的应用潜力.

关键词: 二氧化钛, 电催化, 电化学析氢反应, 界面工程

Abstract:

In this paper, a self-supporting titanate nanowire thin film was synthesized by a hydrothermal method. After an ion exchange reaction and a high-temperature H2/Ar(5%) mixture reduction, the Ni nanoparticles modified oxygen-rich vacancy TiO2 nanowire self-supporting films(Ni/TiO2-VO NFFs) were obtained. During the high-temperature reduction in H2/Ar atmosphere, abundant oxygen vacancies and low-coordinated Ti3+ sits were generated on the surface of TiO2 nanowires, which lead to the improvement of the electrical conductivity of TiO2 film. In addition, the strong interaction between Ni nanoparticles and TiO2 optimized the electronic structure and promoted the electrocatalytic hydrogen evolution reaction(HER) activity. density functional theory(DFT) calculations revealed that Ni/TiO2-VO NFFs had optimal Gibbs free energy of hydrogen adsorption(ΔGH*). As a result, Ni/TiO2-VO NFFs exhibited an overpotential of 67 mV at 10 mA/cm2 in 1 mol/L KOH solution and displayed excellent stability, showing great potential in the field of electrocatalytic HER.

Key words: TiO2, Electrocatalysis, Hydrogen evolution reaction(HER), Interface engineering

中图分类号: 

TrendMD: