Modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads for enhanced photocatalytic hydrogen evolution

作者：Gu, Chao; Liu, Yu-Qing; Liu, Guo-Qiang; Xu, Hou-Ming; Li, Yi; Zhang, Xiao-Long; Wu, Liang; Shi, Lei; Hang, Shi-Kui^*; Gao, Min-Rui; Yu, Shu-Hong^*

来源：Nano Research, 2023, 16(5): 7967-7973.

DOI：10.1007/s12274-022-5324-0

• heteronanostructures
• colloidal synthesis
• semiconducting sulfides
• photocatalytic
• hydrogen evolution reaction

Heteronanostructures (HNs) with precise components and interfaces are important for many applications, such as designing efficient and robust solar-to -fuel catalysts via integrating specific semiconductors with favorable band alignments. However, rationally endowing such features with rigorous framework control remains a synthetic bottleneck. Herein, we report a modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads (NTds), comprising both isolated Pd,S oxidation (ox) and MoS2 reduction (red) domains within each single CdS counterpart, which exhibit superior photocatalytic activity and stability for hydrogen evolution reaction (HER). The stepwise constructed PdxS(ox)-CdS-MoS2(red) NTds possess dual interfaces facilitating continuous charge separation and segregated active sites accelerating redox reactions, respectively, achieving the HER rate up to 9 mmol circle h(-1)g(-1), which is about 60 times higher than that of bare CdS, and show no evidence of deactivation after long-term cycling. This design principle and transformation protocol provide predictable retrosynthetic pathways to HNs with increased degree of complexity and more elaborate functionalities that are otherwise inaccessible.