Cu2O Thin Film Photoelectrode Embedded with CuO Nanorods for Photoelectrochemical Water Oxidation
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Assembling heterostructures by combining dissimilar oxide semiconductors is a promising approach to enhance charge separation and transfer in photoelectrochemical (PEC) water splitting. In this work, the CuO nanorods array/Cu2O thin film bilayered heterostructure was successfully fabricated by a facile method that involved a direct electrodeposition of the Cu2O thin film onto the vertically oriented CuO nanorods array to serve as the photoelectrode for the PEC water oxidation. The resulting copper-oxide-based heterostructure photoelectrode exhibited an enhanced PEC performance compared to common copper-oxide-based photoelectrodes, indicating good charge separation and transfer efficiency due to the band structure realignment at the interface. The photocurrent density and the optimal photocurrent conversion efficiency obtained on the CuO nanorods/Cu2O thin film heterostructure were 0.59 mA/cm2 and 1.10% at 1.06 V vs. RHE, respectively. These results provide a promising route to fabricating earth-abundant copper-oxide-based photoelectrode for visible-light-driven hydrogen generation using a facile, low-cost, and scalable approach of combining electrodeposition and hydrothermal synthesis.
Abstract
Assembling heterostructures by combining dissimilar oxide semiconductors is a promising approach to enhance charge separation and transfer in photoelectrochemical (PEC) water splitting. In this work, the CuO nanorods array/Cu2O thin film bilayered heterostructure was successfully fabricated by a facile method that involved a direct electrodeposition of the Cu2O thin film onto the vertically oriented CuO nanorods array to serve as the photoelectrode for the PEC water oxidation. The resulting copper-oxide-based heterostructure photoelectrode exhibited an enhanced PEC performance compared to common copper-oxide-based photoelectrodes, indicating good charge separation and transfer efficiency due to the band structure realignment at the interface. The photocurrent density and the optimal photocurrent conversion efficiency obtained on the CuO nanorods/Cu2O thin film heterostructure were 0.59 mA/cm2 and 1.10% at 1.06 V vs. RHE, respectively. These results provide a promising route to fabricating earth-abundant copper-oxide-based photoelectrode for visible-light-driven hydrogen generation using a facile, low-cost, and scalable approach of combining electrodeposition and hydrothermal synthesis.
참고문헌 (19)
- N. S. Lewis, "Powering the planet:Chemical challenges in solar utilization", Proc. Natl. Acad. Sci. USA, 103, pp.15729~15735 (2006)
- P. V. Kamat, "Meeting the clean energy demand:Nanostructure architecture for sloar energy conversion", J. Phys. Chem. C, 111, pp.2834~2860 (2007)
- Y, Yang, "Cu2O", CuO bilayered composite as a high-efficiency photocathode for photoelectrochemical hydrogen evolution reaction, 2016, pp.6, 30158~
- A. Kudo, "Heterogeneous photocatalyst materials for water splitting", Chem. Soc. Rev, 38, pp.253~278 (2009)
- F. E. Osterloch, "Inorganic nanostructures for photoelectrochemical and photocatalytic water splitting", Chem, Soc. Rev, 42, pp.2294~2320 (2013)
- X. Chen, "Semiconductor-based photocatalytic hydrogen generation", Chemical Reviews, 110, pp.6503~6570 (2010)
- Y. Liu, "Design of sandwich-structured ZnO", ZnS, Nano Res, pp.2015, 8[DOI]
- R. van de Krol, "Photoelectrochemical Hydrogen Production" (2012), Springer
- M.G. Walter, "Solar water splitting cells", Chem. Rev, 110, pp.6446~6473 (2010)
- 박종현, "수직으로 정렬된 산화아연 나노막대 광전극의 광전기화학적 특성", 한국표면공학회지, 51(4), pp.237~242 (2018), 한국표면공학회[DOI]
- H.M. Chen, "Nano-architecture and material designs for water splitting photoelectrodes", Chem. Soc. Rev, 41, pp.5654~5671 (2012)
- K. Rajeshwar, "Tailoring copper oxide semiconductor nanorod arrays for photoelectrochemical reduction of carbon dioxide to methanol", ChemPhysChem, 14, pp.2251~2259 (2013)
- S. J. A. Moniz, "Visible-light driven heterojunction photocatalysts for water splitting—a critical review", Energy Environ. Sci, 8, pp.731~759 (2015)
- Z. Kang, "Electric structure engineering of Cu2O film", ZnO nanorods array all-oxide p-n heterostructure for enhanced photoelectrochemical properties and self-powered biosensing application, 2015, pp.5, 7882~
- L. Liu, "Synthesis of aligned copper oxide nanorod arrays by a seed mediated hydrothermal method", J. Alloys Compd, 511, pp.195~197 (2012)
- P.Y. Yu, "Resonance Raman scattering in Cu2O at the blue and indigo excitons", Solid State Commun, 12, pp.973~975 (1973)
- P.Y. Yu, "Resonance Raman studies in Cu2O. I. The phonon-assisted 1s yellow excitonic absorption edge", Phys. Rev. B, 12, pp.1377~1394 (1975)
- H.F. Goldstein, "Raman study of CuO single crystal", Phys. Rev. B, 41, pp.7192~7194 (1990)
- Z. Chen, "Photoelectrochemical Water Splitting: Standards, Experimental Methods, and Protocols", pp.10~ (2013), Springer