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<p>Aimed to enhance the electrocatalytic efficiency of the Electrocatalytic hydrogen evolution reaction (HER) by synthesizing TiO<sub>2</sub>/Co<sub>3</sub>O<sub>4</sub> composites as highly efficient HER electrocatalysts through a two-step hydrothermal reaction method. Addressing the limitations of conventional TiO<sub>2</sub> materials, such as poor electrical conductivity and limited adsorption/desorption ability of hydrogen intermediates, our strategy used the superior electrical conductivity and catalytic activity of Co<sub>3</sub>O<sub>4</sub>. Furthermore, this method significantly increased the surface roughness of TiO<sub>2</sub> microspheres, thereby exposing a greater number of electrocatalytic active sites. The resulting TiO<sub>2</sub>/Co<sub>3</sub>O<sub>4</sub>/CC composites exhibited remarkable performance in the HER process, achieving a current density of 10&#xa0;mA·cm⁻² at a low overpotential of only 150 mV. This outcome indicates fast reaction kinetics and significantly enhanced electrocatalytic activity. Notably, the composite demonstrated robust stability during long-term electrolysis experiments, maintaining stable operation at a current density of 10&#xa0;mA·cm⁻² for 20&#xa0;h. These findings provide valuable insights for the design of cost-effective catalysts and the optimization of HER performance.</p>

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Synthesis of TiO2/Co3O4 Composites and their Enhanced Performance in the Electrocatalytic Hydrogen Evolution Reaction

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Changshun Zheng,
  • Fen Qiao

摘要

Aimed to enhance the electrocatalytic efficiency of the Electrocatalytic hydrogen evolution reaction (HER) by synthesizing TiO2/Co3O4 composites as highly efficient HER electrocatalysts through a two-step hydrothermal reaction method. Addressing the limitations of conventional TiO2 materials, such as poor electrical conductivity and limited adsorption/desorption ability of hydrogen intermediates, our strategy used the superior electrical conductivity and catalytic activity of Co3O4. Furthermore, this method significantly increased the surface roughness of TiO2 microspheres, thereby exposing a greater number of electrocatalytic active sites. The resulting TiO2/Co3O4/CC composites exhibited remarkable performance in the HER process, achieving a current density of 10 mA·cm⁻² at a low overpotential of only 150 mV. This outcome indicates fast reaction kinetics and significantly enhanced electrocatalytic activity. Notably, the composite demonstrated robust stability during long-term electrolysis experiments, maintaining stable operation at a current density of 10 mA·cm⁻² for 20 h. These findings provide valuable insights for the design of cost-effective catalysts and the optimization of HER performance.