In this study, a new noble-metal-free co-catalyst V₈C₇ was studied for photocatalytic hydrogen evolution. The H₂ evolution rate of pristine g-C₃N₄ (46.3 μmol g⁻¹ h⁻¹) was improved 25 times by loading 5 wt% V₈C₇ (1187.6 μmol g⁻¹ h⁻¹). The morphology, structure, and composition of the V₈C₇ loaded g-C₃N₄ are characterized in detail. The effects of co-catalyze with V₈C₇ on H₂-evolution kinetics, light absorption, and electron-hole separation are carefully investigated. It is believed that loading with V₈C₇ can accelerate the kinetics for H₂ evolution, improve the transferring and separation of electron-hole pairs, and enhance light absorption, thus archiving the improvement of H₂ evolution. This work indicates that V₈C₇ can be a promising TMC material to substitute noble metal in various photocatalytic applications.

在这项研究中，研究了一种新的无贵金属助催化剂 V ₈ C ₇用于光催化析氢。通过加载5wt% V ₈ C ₇ (1187.6 μmol g ^-1 h ^-1 ) ，原始gC ₃ N ₄ (46.3 μmol g ^-1 h ^-1 )的H ₂析出率提高了25倍。详细表征了负载V ₈ C _{7 的}gC ₃ N ₄的形态、结构和组成。与V ₈ C ₇共催化对H _{2 的影响}仔细研究了演化动力学、光吸收和电子-空穴分离。认为负载V ₈ C ₇可以加速H ₂演化的动力学，改善电子-空穴对的转移和分离，并增强光吸收，从而存档H ₂演化的改进。这项工作表明，V ₈ C ₇是一种很有前途的TMC材料，可以在各种光催化应用中替代贵金属。