分解水
催化作用
材料科学
光电化学
化学工程
相(物质)
光电阴极
太阳能转换
光电化学电池
电化学
无机化学
化学
太阳能
光催化
电极
物理
物理化学
电气工程
生物化学
有机化学
量子力学
电子
工程类
电解质
作者
Iván Merino-Garcia,Sara Crespo,Maite Perfecto-Irigaray,Garikoitz Beobide,Ángel Irabien,Jonathan Albo
标识
DOI:10.1016/j.cattod.2024.114581
摘要
Photoelectrochemical gas-phase solar water splitting represents a promising avenue for sustainable hydrogen production, fulfilling the energy demands of the future. In this work, we present the fabrication and optimization of the functional performance of visible-light active BiVO4/WO3 photoanodes with a tailored multi-layered structure. The photoanodes are manufactured in a reproducible way by an automated spray pyrolysis technique, including BiVO4 (top layer) and WO3 (bottom layer) in a multi-layered structure with different ratios (80:20; 50:50; 20:80). The photoactive surfaces are fully characterized and then evaluated in a divided filter-press reactor operated in continuous mode under visible light irradiation (100 mW cm−2), where a platinized titanium plate is used as dark cathode. The results demonstrate the pivotal role of mass ratio in optimizing charge transfer kinetics and recombination rates in the photoanode. We demonstrate the synergistic effects between BiVO4 and WO3, elucidating their contributions to enhance light absorption, and reduce electron-hole recombination, determining an optimal ratio of 80:20 for both hydrogen production (155.7 μmol m−2 s−1) and on-off current density gap (0.66 mA cm−2). The developed multi-layered BiVO4/WO3 surfaces thus offer a compelling pathway for advancing gas-phase photoelectrochemical water splitting technology, underscoring the significance of electrode design and paving the way for sustainable solar hydrogen production.
科研通智能强力驱动
Strongly Powered by AbleSci AI