Chen Yiming, Wang Zirong, Zhang Yue, Wei Ping, Xu Wenkang, Wang Hongjuan, Yu Hao, Jia Jianbo, Zhang Kun, Peng Chao
School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China.
School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China.
ACS Appl Mater Interfaces. 2023 Apr 26;15(16):20027-20039. doi: 10.1021/acsami.2c21049. Epub 2023 Apr 12.
Photocatalytic water cracking hydrogen (H) production is a promising clean energy production technology. Therefore, a ternary CdS@NbO/NbC (MXene) heterojunction with hierarchical structure was designed to promote photocatalytic H evolution. When NaS/NaSO and lactic acid were used as sacrificial agents, the hydrogen evolution reaction (HER) rates of the optimized photocatalyst were 1501.7 and 2715.8 μmol g h, with 12.4% and 26.1% apparent quantum efficiencies (AQE) at 420 nm, respectively. Its HER performance was 10.9-fold higher than that of pure CdS and remained 87% activity after five rounds of cycle tests. Such an enhancement stems from the excellent light absorption properties, tight interfacial contact, fast charge transfer channel, and sufficient active sites. Mechanism analysis demonstrates that S-scheme and Schottky junction synchronous regulation boost hierarchical CdS@NbO/NbC for photocatalytic H production. This work creates possibilities for manufacturing Nb-based MXene photocatalysts for converting solar energy and other applications.
光催化水裂解制氢是一种很有前景的清洁能源生产技术。因此，设计了一种具有分级结构的三元CdS@NbO/NbC（MXene）异质结以促进光催化析氢。当使用NaS/NaSO和乳酸作为牺牲剂时，优化后的光催化剂的析氢反应（HER）速率分别为1501.7和2715.8 μmol g h，在420 nm处的表观量子效率（AQE）分别为12.4%和26.1%。其HER性能比纯CdS高10.9倍，经过五轮循环测试后仍保持87%的活性。这种增强源于优异的光吸收性能、紧密的界面接触、快速的电荷转移通道和充足的活性位点。机理分析表明，S型和肖特基结同步调控促进了分级CdS@NbO/NbC的光催化制氢。这项工作为制造用于太阳能转换和其他应用的Nb基MXene光催化剂创造了可能性。
