Facile fabrication of visible light driven tin oxide photoanode and its photoelectrochemical water splitting properties

Tian, Mengkui; Peng, Wenjie; Shang, BaiWei; Tao, Wenliang; Xiao, Yue

doi:10.1016/j.ijhydene.2012.05.094

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…18) and Cu 2 O. 19 Semiconductors, such as TiO 2 , 1 WO 3 , 2 GaN, 20 SnO 2 , 21 Fe 2 O 3 , 3 SrTiO 3 , 5 BaTiO 3 , 5 ZnO 22 or ZnS 23 are promising photoanode candidates because they absorb high energy photons and are, therefore, capable of generating enough photovoltage (a minimum of 1.23 V) to drive unassisted water oxidation or both water oxidation and reduction (e.g., TiO 2 , TaON). 24 The disadvantage of wide-bandgap semiconductors is that their light absorption is mostly limited to the UV region of the solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical water oxidation by screen printed ZnO nanoparticle films: effect of pH on catalytic activity and stability

et al. 2014

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Nanostructured ZnO films are promising photoanode materials in photoelectrochemical water splitting. While such ZnO photoanodes have achieved high activity and good light conversion efficiency in the UV spectral region, their application in water splitting devices has been hampered by the susceptibility of ZnO towards photocorrosion in aqueous electrolytes. We report a systematic investigation aimed at optimising the electrolyte solution to improve the long-term stability of ZnO photoanodes. A stability diagram, based on the band edge positions of ZnO and the pH-dependent photodegradation potentials of ZnO (relative to the decomposition of water), indicates that the optimum pH operating conditions for ZnO photoanodes lie between pH 9-12.5. To verify this prediction experimentally, the activity and long-term stability of uniform screen-printed nano-ZnO films was tested in a wide range of buffered and non-buffered electrolytes (pH 6-13.5). The ZnO films were more active in buffered, than in non-buffered electrolytes, and the highest activities were observed close to the pKa of the phosphate and borate buffers used. Under zero applied potential, these screen-printed films achieved the highest reported photocurrents to date (0.42 mA cm(-2) at pH 6 and 0.67 mA cm(-2) at pH 10.5) for any pristine or modified ZnO-based water oxidation catalyst. The films were subjected to 12 h of controlled potential electrolysis, in selected electrolytes, under AM 1.5G simulated sunlight. The results are in good agreement with calculations based on thermodynamic data for ZnO. Films tested at pH 6 and 7 (representing typically used operating conditions) degraded rapidly, whereas they exhibited the highest stability when tested in a pH 10.5 borate buffer. In this case, 75% of the initial photoactivity was preserved after 12 hours, indicating that the lifetime of the electrode could be increased by over an order of magnitude compared to standard testing conditions.

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Section: Introductionmentioning

confidence: 99%

Photoelectrochemical water oxidation by screen printed ZnO nanoparticle films: effect of pH on catalytic activity and stability

et al. 2014

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“…Finally, the PEC performance was obtained in this study compared with many previously studied SnO 2 - based PEC electrodes as revealed in Table 3 [ 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. The values of J, IPCE, and ABPE confirm that the (2.5% Co, 673 K) SnO 2 is an efficient electrode for the PEC H 2 O splitting under visible light exposure.…”

Section: Resultsmentioning

confidence: 93%

The Impact of Co Doping and Annealing Temperature on the Electrochemical Performance and Structural Characteristics of SnO2 Nanoparticulate Photoanodes

et al. 2022

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Obtaining H2 energy from H2O using the most abundant solar radiation is an outstanding approach to zero pollution. This work focuses on studying the effect of Co doping and calcination on the structure, morphology, and optical properties of spin-coated SnO2 films as well as their photoelectrochemical (PEC) efficiency. The structures and morphologies of the films were investigated by XRD, AFM, and Raman spectra. The results confirmed the preparation of SnO2 of the rutile phase, with crystallite sizes in the range of 18.4–29.2 nm. AFM showed the granular structure and smooth surfaces having limited roughness. UV-Vis spectroscopy showed that the absorption spectra depend on the calcination temperature and the Co content, and the films have optical bandgap (Eg) in the range of 3.67–3.93 eV. The prepared samples were applied for the PEC hydrogen generation after optimizing the sample doping ratio, using electrolyte (HCl, Na2SO4, NaOH), electrode reusability, applied temperature, and monochromatic illumination. Additionally, the electrode stability, thermodynamic parameters, conversion efficiency, number of hydrogen moles, and PEC impedance were evaluated and discussed, while the SnO2 films were used as working electrodes and platinum sheet as an auxiliary or counter electrode (2-electrode system) and both were dipped in the electrolyte. The highest photocurrent (21.25 mA/cm2), number of hydrogen moles (20.4 mmol/h.cm2), incident photon-to-current change efficiency (6.892%@307 nm and +1 V), and the absorbed photon-to-current conversion efficiency (4.61% at ~500 nm and +1 V) were recorded for the 2.5% Co-doped SnO2 photoanode that annealed at 673 K.

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Uniform deposition of coupled CdS and CdSe quantum dots on ZnO nanorod arrays as electrodes for photoelectrochemical solar water splitting

Lin

Kao

Huang

et al. 2015

International Journal of Hydrogen Energy

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Facile fabrication of visible light driven tin oxide photoanode and its photoelectrochemical water splitting properties

Cited by 4 publications

References 39 publications

Photoelectrochemical water oxidation by screen printed ZnO nanoparticle films: effect of pH on catalytic activity and stability

Photoelectrochemical water oxidation by screen printed ZnO nanoparticle films: effect of pH on catalytic activity and stability

The Impact of Co Doping and Annealing Temperature on the Electrochemical Performance and Structural Characteristics of SnO2 Nanoparticulate Photoanodes

Uniform deposition of coupled CdS and CdSe quantum dots on ZnO nanorod arrays as electrodes for photoelectrochemical solar water splitting

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