Publications by authors named "Zhengran Chen"

Emerging high-power piezoelectric applications demand the development of piezoelectric materials featuring both a high mechanical quality factor () and a large piezoelectric coefficient (). However, it is widely accepted that an increase in is usually accompanied with a decrease in , and . Herein, a multiscale regulation strategy is proposed to improve and simultaneously from the perspectives of phase structure, ferroelectric domains, and lattice defects.

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Defect engineering is a proven method to tune the properties of perovskite oxides. In demanding high-power piezoelectric ceramic applications, acceptor doping is the most effective method to harden ceramics, but it inevitably degrades the ceramics' electromechanical properties. Herein, a poling method based on acceptor doping, namely, high-temperature poling, is implemented by applying an electric field above the Curie temperature for poling to achieve a balance of the properties of piezoelectric coefficient and mechanical quality factor .

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The electrochemical oxygen reduction reaction (ORR) offers a most promising and efficient route to produce hydrogen peroxide (H O ), yet the lack of cost-effective and high-performance electrocatalysts have restricted its practical application. Herein, an entropy-enhancement strategy has been employed to enable the low-cost perovskite oxide to effectively catalyze the electrosynthesis of H O . The optimized Pb(NiWMnNbZrTi) O ceramic is available on a kilogram-scale and displays commendable ORR activity in alkaline media with high selectivity over 91 % across the wide potential range for H O including an outstanding degradation property for organic dyes through the Fenton process.

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