期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 18, 页码 10277-10288出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.01.118
关键词
Photoelectrochemical water; splitting; Zn-MOF; TiO 2; Stability
资金
- National Natural Science Foundation of China [21671083, 22075112]
- Open Project of State Key Laboratory of Rare Earth Resource Utilizations [RERU2021013]
- Jiangsu Provincial Six Talent Peaks [XCL-019]
This study addresses the stability issue of Zn-MOF (ZIF8) by partially replacing Zn2+ ions with Ni2+ ions, resulting in the successful enhancement of the PEC efficiency and stability of TiO2-Zn MOF. The findings provide new guidance for designing highly stable photoelectrodes.
The exposed active sites of ZIF-8 is considered as the key to boost the kinetics of photoelectrochemical (PEC) water splitting. However, the terrible stability under irradiation and aqueous conditions significantly limit the practical application for fabricating the efficient photoeletrode. Herein, a novel strategy is employed for solving the stability of Zn-MOF (ZIF8) by partially replacing Zn2+ ions by Ni2+ ions. The TiO2 photoelectrode is selected as a testing model to study the superiority of TiO2-ZnNi MOF for PEC water splitting. TiO2 -ZnNi MOF exhibits a strong photocurrent density of 1.00 mA/cm2 (1.23 V vs. RHE), which is 2.7 and 1.7 times that of TiO2 and TiO2-Zn MOF, respectively. More importantly, the photocurrent density of TiO2-ZnNi MOF maintains almost 100% for 2 h, while TiO2-Zn MOF significantly decays to 81.6% for just 8.3 min, indicating the successful achievement for promoting the stability of Zn-MOF. Therefore, this work proposes a reasonable route to simultaneously enhance the PEC efficiency and stability of TiO2-Zn MOF for the first time, which provides a new guidance for the design of highly stable photoelectrode. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据