Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (8): 20230057.doi: 10.7503/cjcu20230057

• Physical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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