Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2021-09-02 , DOI: 10.1016/j.apcata.2021.118341 Yalun Liu 1 , Han Zhang 1 , Yuwen Jiang 1
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.
中文翻译:
一种新型的无贵金属助催化剂 V8C7 在 g-C3N4 上具有增强的光催化析氢活性
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。