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Environment-benign Colloidal Quantum Dots-modified Dual Photoelectrodes for Self-biased Photoelectrochemical Water Splitting.
Xia, Li; Li, Xin; Yang, Yang; Tong, Xin.
Afiliación
  • Xia L; Panzhihua University, School of Electrical and Information Engineering, CHINA.
  • Li X; Panzhihua University, School of Electrical and Information Engineering, CHINA.
  • Yang Y; Panzhihua University, School of Electrical and Information Engineering, CHINA.
  • Tong X; University of Electronic Science and Technology of China, Institute of Fundamental and Frontier Sciences, NO.4, SECTION 2, NORTH JIANSHE ROAD, 610054, Chengdu, CHINA.
ChemSusChem ; : e202401298, 2024 Aug 08.
Article en En | MEDLINE | ID: mdl-39115637
ABSTRACT
Photoelectrochemical (PEC) water splitting based on colloidal quantum dots (QDs) presents a promising approach for utilizing solar energy to produce green hydrogen energy. Previous research has been mainly focused on the single-photoelectrode QDs-PEC device operated under external bias, while the investigation of dual-photoelectrode configuration for self-biased QDs-PEC system is still lacking. In this work, two types of eco-friendly Cu-AISe/ZnSeCu (CZAC) and Mn-AIS/ZnS@Cu (MAZC) QDs were used to respectively sensitize the semiconductor n-type TiO2 and p-type Cu2O photoelectrodes, which acted as the photoanode and photocathode to build a heavy metal-free QDs-based bias-free solar water splitting cell, yielding a maximum photocurrent density of 0.47 mA cm-2 and a solar-to-hydrogen (STH) efficiency of 0.4% under 1 sun AM 1.5G illumination (100 mW cm-2). Moreover, approximate 692 nmol of H2 and 355 nmol of O2 with molar ratio of ~21 was detected after two hours of continuous light illumination, demonstrating the effective overall water splitting. This work indicates a significant advancement towards the realization of a cost-effective, efficient and "green" QDs-based artificial solar-to-fuel conversion system.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemSusChem Asunto de la revista: QUIMICA / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemSusChem Asunto de la revista: QUIMICA / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania