期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 292, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120184
关键词
Paper electrode; Tandem Z-scheme configuration; MoSe2-CdS-ZnO array; Photothermal effect; Photoelectrochemical water splitting
资金
- National Natural Science Foundation of China [21874055, 22074053]
- Taishan Scholars Program, Case-by-Case Project for Top Outstanding Talents of Jinan
- Excellent Youth Innovation Team in Universities of Shandong [2019KJC016]
- project of 20 items of University of Jinan [2018GXRC001]
- Gao Tingyao Foundation of Tongji University
The rational design of photoelectrode architectures is an effective solution for enhancing the efficiency of photoelectrochemical water splitting. In this study, a programmable flexible photoanode with a tandem Z-scheme configuration was developed, showing promising results in terms of light-harvesting and charge carrier transfer. This innovative approach may lead to the construction of high-performance photoelectrochemical water splitting devices.
Rational design of photoelectrode architectures is deemed as an effective solution to enhance efficiency of photoelectrochemical water splitting for conquering increasingly prominent environmental problems. Herein, a programmable flexible photoanode with built-in tandem Z-scheme configuration fabricated by in-situ growth of MoSe2-CdS-ZnO array with ultrathin nanosheet-interlaced-nanorod structure on the Au paper electrode, is firstly reported. By taking advantages of the interwoven nanonetwork structure, high conductivity as well as larger porosity of the as-fabricated Au paper electrode, a stable light-harvesting paper chip with fast transfer/separate mediators of the charge/carriers is thus integrated. By virtue of double internal electric fields (IEFs) and photothermal effect, the developed MoSe2-CdS-ZnO photoanode exhibits incident-photon-to-current efficiency of 52 % under 460 nm of light irradiation, and the current density reaches 2.4 mA cm-2 at 0.3 V versus normal hydrogen electrode, which is comparable with respect to current state-of-the-art type-II-scheme, surfacescheme, and cocatalyst-free photocatalysts (0.03-2.4 mA cm-2). Consequently, the paper-based photoanode achieves admirable photoelectrocatalytic hydrogen generation property (39.7 mu mol cm-2 h-1). The synergistic effect of tailorable tandem Z-scheme configuration with double IEFs and delineating of 3D cross-linked network structure of the proposed photoanode in this work may open an avenue for constructing high-performance photoelectrochemical water splitting devices.
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