WO3@ZnO Nanoarrays as the Photoanode for Photoelectrochemical Production of H2O2

Autor:	Chenzhong Yao, Huimin Ren, Bohui Wei, Chunxi Yang, Li Ma
Rok vydání:	2023
Předmět:	Renewable Energy Sustainability and the Environment Materials Chemistry Electrochemistry Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials
Zdroj:	Journal of The Electrochemical Society. 170:016502
ISSN:	1945-7111 0013-4651
DOI:	10.1149/1945-7111/acb08c
Popis:	WO3@ZnO core–shell nanoarrays with a Z-scheme heterojunction structure have been fabricated by combining electrodeposition and dropping process and used as photoanodes for the production of hydrogen peroxide (H2O2). The photocurrent density of the WO3@ZnO nanoarray photoanode is 1.57 mA∙cm−2 at the applied potential of 1.8 V vs reversible hydrogen electrode, which exhibits almost 4 time larger than that of pure ZnO nanoarray photoanode. A high photoconversion efficiency to the production of H2O2 (0.53%) and Faradic efficiency (33%) are also reached by this WO3@ZnO nanoarray photoanode under Air-Mass 1.5 Global (AM 1.5 G, 100 mW∙cm−2). This work provides an effective approach for the application of Z-scheme heterojunction in the photoelectrochemical synthesis of H2O2.
Databáze:	OpenAIRE
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