Journal
APPLIED SURFACE SCIENCE
Volume 358, Issue -, Pages 436-442Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.08.160
Keywords
Zn-Co; LDH; Hematite; Electrocatalyst; Photoelectrochemical water splitting
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Funding
- Natural Science Foundation of China [51572046]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110075130001]
- Science and Technology Commission of Shanghai Municipality [13JC1400200]
- Shanghai Natural Science Foundation [15ZR1401200]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Innovative Research Team in University [IRT1221]
- Program of Introducing Talents of Discipline to Universities [111-2-04]
- Fundamental Research Funds for the Central Universities [2232014A3-06]
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Zinc-cobalt layered double hydroxide (LDH) was electrodeposited on Ti-doped hematite photoanodes for the first time, and a significant enhanced performance for photoelectrochemical water splitting was demonstrated over the composite photoanodes. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and electrochemical impedance spectroscopy (EIS) were characterized with the resulted photoanodes. With the electrodepositing treatment, the photocurrent density increased from 1.27 mA/cm(2) for pristine hematite to 1.73 mA/cm(2) for modified materials at 1.23 V vs. RHE (i.e. 36% improvement). The photocurrent improvement is mainly attributed to a suppression of electron-hole recombination and reduced overpotential for water oxidation at the hematite-electrolyte interface due to the formation of Zn-Co LDH layer on hematite. (C) 2015 Elsevier B.V. All rights reserved.
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