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Nano-hetero-structured thin films, ZnO/Ag-(α)Fe2O3, with n/n junction, as efficient photoanode for renewable hydrogen generation via photoelectrochemical water splitting

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  • Kaur, Gurpreet
  • Divya,
  • Khan, Saif A.
  • Satsangi, Vibha R.
  • Dass, Sahab
  • Shrivastav, Rohit

Abstract

Significant gains in PEC water splitting photocurrent were recorded using n/n junction bi-layered nano-hetero-structured (BNHS) thin films, ZnO/Ag-(α)Fe2O3, as photoanode. Films, synthesized over ITO (In:SnO2) glass plates, were characterized by X-ray diffractometry, field emission-scanning electron microscopy, atomic force microscopy, UV–visible spectroscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. PEC cell, fabricated through electrical contacting of BNHS films (3% Ag incorporation)/electrolyte (0.1 M NaOH, pH 13, temperature 32 ± 3.6 °C) junction working electrode with platinum counter electrode and saturated calomel reference electrode, yielded nearly 2 and 20 fold increment in photocurrent, against monolayered pristine ZnO and (α)Fe2O3 thin films, respectively. Marked gain in PEC cell-response towards water splitting was attributed to high active surface area and n/n hetero-junction that favored the separation and transfer of photogenerated charge carriers.

Suggested Citation

  • Kaur, Gurpreet & Divya, & Khan, Saif A. & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2021. "Nano-hetero-structured thin films, ZnO/Ag-(α)Fe2O3, with n/n junction, as efficient photoanode for renewable hydrogen generation via photoelectrochemical water splitting," Renewable Energy, Elsevier, vol. 164(C), pages 156-170.
    • Handle: RePEc:eee:renene:v:164:y:2021:i:c:p:156-170
    DOI: 10.1016/j.renene.2020.09.060
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    References listed on IDEAS

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    1. Edwards, P.P. & Kuznetsov, V.L. & David, W.I.F. & Brandon, N.P., 2008. "Hydrogen and fuel cells: Towards a sustainable energy future," Energy Policy, Elsevier, vol. 36(12), pages 4356-4362, December.
    2. Sharma, Dipika & Upadhyay, Rishibrind Kumar & Satpati, Biswarup & Satsangi, Vibha R. & Shrivastav, Rohit & Waghmare, Umesh V. & Dass, Sahab, 2017. "Electronic band-offsets across Cu2O/BaZrO3 heterojunction and its stable photo-electro-chemical response: First-principles theoretical analysis and experimental optimization," Renewable Energy, Elsevier, vol. 113(C), pages 503-511.
    3. Sharma, Shailja & Pai, Mrinal R. & Kaur, Gurpreet & Divya, & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2019. "Efficient hydrogen generation on CuO core/AgTiO2 shell nano-hetero-structures by photocatalytic splitting of water," Renewable Energy, Elsevier, vol. 136(C), pages 1202-1216.
    4. Hall, Peter J., 2008. "Energy storage: The route to liberation from the fossil fuel economy?," Energy Policy, Elsevier, vol. 36(12), pages 4363-4367, December.
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    1. Belessiotis, George V. & Kontos, Athanassios G., 2022. "Plasmonic silver (Ag)-based photocatalysts for H2 production and CO2 conversion: Review, analysis and perspectives," Renewable Energy, Elsevier, vol. 195(C), pages 497-515.
    2. Liu, Yuhong & Zhu, Tianyu & Lin, Mingjuan & Liang, Yujie & Fu, Junli & Wang, Wenzhong, 2021. "Nonmetal plasmonic TiN nanoparticles significantly boost photoelectrochemical performance for hydrogen evolution of CdS nanoroad array photoanode," Renewable Energy, Elsevier, vol. 180(C), pages 1290-1299.
    3. Dasireddy, Venkata D.B.C. & Likozar, Blaž, 2022. "Cu–Mn–O nano-particle/nano-sheet spinel-type materials as catalysts in methanol steam reforming (MSR) and preferential oxidation (PROX) reaction for purified hydrogen production," Renewable Energy, Elsevier, vol. 182(C), pages 713-724.

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