MoS2 and Ti3C2 Ensembles into TiO2 for Efficient Photocatalytic Hydrogen Evolution: Dual‐Bonding Interactions and Capacitive Effect Trigger the Intrinsic Activities.

Autor:	Dan, Meng1,2,3 (AUTHOR), Li, Junlian2 (AUTHOR), Chen, Cheng1 (AUTHOR), Xiang, Jianglai2 (AUTHOR), Zhong, Yunqian2 (AUTHOR), Wu, Fan2 (AUTHOR), Wang, Zepan1 (AUTHOR), Liu, Zhao-Qing1 (AUTHOR) lzqgzu@gzhu.edu.cn, Zhou, Ying2,4 (AUTHOR) yzhou@swpu.edu.cn
Předmět:	*Solar energy conversion *Hydrogen Hydrogen evolution reactions Charge carriers Charge transfer Intramolecular proton transfer reactions Titanium dioxide
Zdroj:	Energy Technology. Jan2022, Vol. 10 Issue 1, p1-8. 8p.
Abstrakt:	Photocatalytic hydrogen evolution provides a sustainable and environmentally benign approach for large‐scale solar energy conversion. How to substantially trigger the photocatalytic efficiency of semiconductor catalysts is still a challenging issue. Here, the sandwich‐like hierarchical Ti3C2–TiO2–MoS2 (TM) composite is designed and synthesized by in situ growth of TiO2 and MoS2 nanosheets on MXene (Ti3C2) nanosheets. Consequently, the dual‐cocatalyst‐modified TiO2 photocatalyst can spark efficient photocatalytic H2 evolution (4.3 times higher than pristine TiO2) and maintain excellent stability (>30 h). Specifically, the enhancement of photocatalytic efficiency can be originated from the promoted charge separation and migration through TiOMo and COTi dual charge transfer channels and enriched reactive active sites for proton reduction. More importantly, the capacitive properties of MoS2 and Ti3C2 can retain the photogenerated electrons at a long‐lived charge‐separated state, further improving the activity and stability. The potential of earth‐abundant cocatalysts with capacitance effect to construct high‐efficiency and low‐cost photocatalysts is demonstrated. [ABSTRACT FROM AUTHOR]
Databáze:	GreenFILE
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