1. High-efficiency CO2 conversion via mechano-driven dynamic strain engineering of ZnO nanostructures.
- Author
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Ma, Jiangping, Xia, Lu, Wu, Di, Feng, Yajie, Ban, Chaogang, Ruan, Lujie, Guan, Jingfei, Zhang, Min, Zhou, Rundong, Dai, Ji-Yan, Gan, Li-Yong, and Zhou, Xiaoyuan
- Abstract
Strain engineering involves intentionally inducing lattice distortion in materials to manipulate their electronic and geometric properties, along with the accompanying bond strength between reactants and catalysts. This approach presents an appealing pathway to optimize catalytic performance. However, it confronts challenges in achieving precise control, scalability and controllable modulation of intermediate species' adsorption and desorption. Herein, we report a dynamic strain engineering method achieved through ultrasonic cavitation-induced high and low-pressure cycles, enabling periodically adjustable adsorption/desorption properties while bypassing complex synthesis procedures. Illustrated using ZnO and CO 2 piezo-reduction reaction as a demonstration, theoretical studies initially predict that adsorption of intermediates *COOH can be regulated within a specific range of strains. Under ultrasonic stimulation, ZnO catalyst with dynamic strain engineering exhibits a CO yield of ∼ 98.8 μmol·g
−1 ·h−1 , approximately 16.5 times higher than that achieved under ultraviolet light irradiation without dynamic strain engineering, despite the latter having a considerably stronger input power. Furthermore, we delve into the factors linked to dynamic strain amplitude and frequency. This dynamic strain engineering approach streamlines catalyst preparation and presents innovative possibilities for controlled manipulation of intermediate specie's adsorption/desorption, with potential applications across a wide range of catalytic systems. [Display omitted] • A dynamic strain engineering strategy for periodically tailoring adsorption between catalysts and intermediates is proposed. • This strategy eliminates the bygone need for complex catalyst synthesis and can be universally applied to any catalyst. • The underlying mechanism for the enhanced CO 2 conversion via such strategy is investigated. [ABSTRACT FROM AUTHOR]- Published
- 2024
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