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- W4220747650 abstract "Piezocatalytic hydrogen evolution has emerged as a promising direction for the collection and utilization of mechanical energy and the efficient generation of sustainable energy throughout the day. Hexagonal CdS, as an established semiconductor photocatalyst, has been widely investigated for splitting water into H 2 , while its piezocatalytic performance has attracted less attention, and the relationship between the structure and piezocatalytic activity remains unclear. Herein, two types of CdS nanostructures, namely CdS nanorods and CdS nanospheres, were prepared to probe the above-mentioned issues. Under ultrasonic vibration, the CdS nanorods afforded a superior piezocatalytic H 2 evolution rate of 157 μmol g −1 h −1 in the absence of any co-catalyst, which is nearly 2.8 times that of the CdS nanospheres. The higher piezocatalytic activity of the CdS nanorods is derived from their larger piezoelectric coefficient and stronger mechanical energy harvesting capability, affording a greater piezoelectric potential and more efficient separation and transfer of intrinsic charge carriers, as elucidated through piezoelectric response force microscopy, finite element method, and piezoelectrochemical tests. This study provides a new concept for the design of efficient piezocatalytic materials for converting mechanical energy into sustainable energy via microstructure regulation. CdS spheres and CdS nanorods with different lengths were constructed by hydrothermal method and solvothermal process varying reaction time, respectively. The medium-length CdS nanorods subjected to ultrasonic stimulation exhibits excellent piezocatalytic H 2 evolution performance due to the strong induced piezoelectric potential and benign mechanical strain collecting ability." @default.
- W4220747650 created "2022-04-03" @default.
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- W4220747650 date "2022-05-01" @default.
- W4220747650 modified "2023-10-17" @default.
- W4220747650 title "Engineering piezoelectricity and strain sensitivity in CdS to promote piezocatalytic hydrogen evolution" @default.
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- W4220747650 doi "https://doi.org/10.1016/s1872-2067(21)63976-1" @default.
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