Photoeletrochemical generation of hydrogen over carbon-doped TiO2 photoanode

Zhou, Bin; Schulz, Meghan; Lin, Hong; Shah, S. İsmat; Qu, Jiuhui; Huang, Chin‐Pao

doi:10.1016/j.apcatb.2009.07.026

Cited by 60 publications

(25 citation statements)

References 41 publications

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“…It had been reported by Fujishima et al [2] that TiO 2 semiconductor particles can be used as a photocatalyst for decomposition of water to oxygen and hydrogen. Since then, light-assisted cleavage of water on the surface of semiconductor particles to produce oxygen and hydrogen has been of continued interest [3][4][5][6][7]. In a couple of very recent reviews [3,4], the prospects for visible light-driven hydrogen generation over semiconductor photocatalysts in the presence of a sacrificial electron donor (SED) have been discussed.…”

Section: Introductionmentioning

confidence: 99%

Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Pal

Ghosh

Chatterjee

2011

Transition Met Chem

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Hydrogen generation over carbon-, nitrogenand sulfur-doped TiO 2 semiconductor photocatalysts (represented as C-TiO 2 , N-TiO 2 and S-TiO 2 , respectively) under visible light irradiation has been achieved using various sacrificial electron donors, namely triethanolamine, diethanolamine, monoethanolamine, triethylamine, MeOH, EtOH, EDTA, L-ascorbic acid and phenol. The highest initial rate of H 2 production was found to be in the range 1,000-2,200 lmol/g/h at ambient conditions when triethanolamine was used as sacrificial electron donor. The efficacy of hydrogen production over these photocatalysts depends strongly on the nature of the sacrificial electron donor and decreases in the following order: C-TiO 2 [ STiO 2 [ N-TiO 2 . The results of the present studies suggest that the rate of H 2 production is not simply governed by the reduction potential of the sacrificial electron donor but also by the kinetic barrier of the electron transfer process.

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Section: Introductionmentioning

confidence: 99%

Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Pal

Ghosh

Chatterjee

2011

Transition Met Chem

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“…In the case of Ti-untr sample the photocurrent onset potential was observed near −0.41 V; then the photocurrent density gradually increased with the applied potential because of the increased charge carriers separation under the effect of the applied bias [48][49][50], finally reaching a near saturation condition, where the effect of the applied potential becomes less significant. However, very low photocurrent densities were measured through all the potential window in this case, reaching values lower than 5 A cm -2 at 0.5 V. Accordingly, very low photoconversion efficiencies were calculated, i.e.…”

Section: Photo-electrochemical Testsmentioning

confidence: 96%

Effect of thickness and cracking phenomena on the photocatalytic performances of Ti/TiO2 photoanodes produced by dip coating

Scandola

Latorrata

Matarrese

et al. 2019

Materials Chemistry and Physics

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Photoanodes for water-splitting applications were produced by coating acid-treated Ti slabs using an aqueous dispersion of TiO 2 , polyvinyl alcohol and glycerol. Such components were adjusted to achieve a lower viscosity at a 10 s-1 shear rate, considered as representative of the dip-coating application, for the sake of reducing the final coating thickness while increasing its quality. A correlation was found between the thickness of the oxide layer and the percentage of area occupied by the crevices, which appeared, during the thermal treatment, as an effect of the liquid phase removal. Also, the adhesion appeared to be strongly related to the cracking phenomena, since less cracked samples withstood much lower weight losses during the adhesion tests. The lower adhesion of thicker coatings was found to affect the photo-catalytic performances of the photoanodes, showing lower photocurrents and efficiencies when compared with thinner ones.

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“…The carbondoping has been known to enhance the absorption of visible light of TiO 2 and its photocatalytic activity under visible light [36]. Band-gap narrowing by the formation of defects and O-Ti-C bonds was suggested to be responsible for the photocatalytic activity under visible light [37][38][39].…”

Section: Samplementioning

confidence: 99%