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• W3113307918 abstract "Abstract Synthesis of new piezoelectric materials to harness the vibrational and thermal energies may contribute to solve the current increasing energy demands. KNbO 3 is a known piezo- electric material that exhibits poor piezocatalytic activity owing to the scarcity of charge carriers in it. In order to enhance the charge carrier density in KNbO 3 , extra electrons were added to KNbO 3 lattice. Extrinsic piezoelectric KNbO 3−x having extra electrons in the lattice was synthesized via the reaction between Nb 2 O 5 and KBH 4 at elevated temperatures. The KNbO 3 nanostructures formed at 450 and 550 °C contained feebly piezoelectric KNbO 3−x /Nb 2 O 5−x and piezoelectric KNbO 3−x respectively. The enhanced piezocatalytic activity of KNbO 3−x is demonstrated by the production of hydrogen from water by harnessing the mechanical vibrations and the observed hydrogen production rates are 0.05 and 3.19 ml h −1 g 1 for KNbO 3−x /Nb 2 O 5−x and KNbO 3−x respectively. The enhanced piezocatalytic activity of KNbO 3−x can be attributed to the enhancement of the charge carrier density resulting from the creation of oxygen vacancies in KNbO 3 that lead to enhancing the electronic conductivity as well as charge carrier separation. It is demonstrated that the piezocatalytic activity can be boosted by augmenting the charge carrier density in piezoelectric materials by synthesizing them under highly reducing reaction conditions." @default.
• W3113307918 created "2020-12-21" @default.
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• W3113307918 date "2020-12-01" @default.
• W3113307918 modified "2023-09-26" @default.
• W3113307918 title "Enhancement of the conversion of mechanical energy into chemical energy by using piezoelectric KNbO_3−x with oxygen vacancies as a novel piezocatalyst" @default.
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• W3113307918 doi "https://doi.org/10.1088/2632-959x/abd290" @default.
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