A Three-Dimensional ZnO/CdS/NiFe Layered Double Hydroxide Photoanode Coupled with a Cu2O Photocathode in a Tandem Cell for Overall Solar Water Splitting

Jia Liu; Yinghua Zhang; Zhiming Bai; Zhian Huang; Yukun Gao; Yuan Yao

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자료유형: 학술저널

저자정보: Jia Liu (University of Science and Technology Beijing) Yinghua Zhang (University of Science and Technology Beijing) Zhiming Bai (University of Science and Technology Beijing) Zhian Huang (University of Science and Technology Beijing) Yukun Gao (University of Science and Technology Beijing) Yuan Yao (Mining Products Safety Approval and Certi¯cation Center Co. Ltd.)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.11

발행연도: 2019.1

수록면: 151 - 165 (15page)

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An integrated tandem photoelectrochemical (PEC) cell, composed of a three-dimensional (3D) ZnO/CdS/NiFe layered double hydroxide (LDH) core/shell/hierarchical nanowire arrays (NWAs) photoanode and a p-Cu2O photocathode, was designed for unassisted overall solar water splitting in this study. The optical and photoelectrochemical characteristics of ZnO-based photoanodes and Cu2O photocathode were investigated. The results show that ZnO/CdS/NiFe LDH nanostructures offer significantly enhanced performances with a photocurrent density reaching 5.8 mA · cm -2 at 0.9 V and an onset potential as early as 0.1 V (versus RHE). The enhancement can be attributed to the existence of CdS nanoparticles (NPs) which boosts the light absorption in visible region and enhances charge separation. Moreover, the introduction of NiFe LDH nanoplates, with unique hierarchical mesoporous architecture, promotes electrochemical reactions by providing more active sites as co-catalyst. On the above basis, the ZnO/CdS/NiFe LDH–Cu2O two-electrode tandem cell system was established. At zero bias, the device shows a photocurrent density of 0.4 mA · cm -2 along with the corresponding solar-to-hydrogen (STH) conversion efficiency reaching 0.50%. Our results indicate that the tandem PEC cells consisting of metal–oxide–semiconductor photoelectrodes based on Earth-abundant and low-cost materials hold promising application potential for overall solar water splitting.

#PEC tandem cell #self-driven water splitting #ZnO #CdS #NiFe LDH #solar hydrogen

참고문헌 (53)

참고문헌 신청

S. J. A. Moniz / 2015 / Energy Environ. Sci 8:731

M. Shao / 2014 / Adv. Funct. Mater 24:565

Mathieu S. Prévot / 2013 / Photoelectrochemical Tandem Cells for Solar Water Splitting / The Journal of Physical Chemistry C 117(35):17879~17893

Ji-Wook Jang / 2015 / Enabling unassisted solar water splitting by iron oxide and silicon / Nature Communications 6(1)

P. Chakthranont / 2017 / Adv. Energy Mater 7:1701515

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