Photoassisted hydrogen production from a water-ethanol solution: a comparison of activities of AuTiO2 and PtTiO2

Bamwenda, Gratian R.; Tsubota, Susumu; Nakamura, T.; Haruta, Masatake

doi:10.1016/1010-6030(95)04039-i

Cited by 593 publications

(285 citation statements)

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“…Au NP size, dispersion, loading and NP-support interaction all play critical roles in the photocatalytic activity of Au/TiO 2 with all these parameters dependent upon the catalyst preparation methods [17,[22][23][24]. Among the many methods of preparing Au, particle deposition-precipitation of Au onto TiO 2 provides the good interfacial contact necessary for photocatalytic activity from Au/TiO 2 as initially observed by Bamwenda et al [22,24] when comparing various Au/ TiO 2 photocatalyst preparation methods.…”

Section: Au/tio 2 Nanoparticlesmentioning

confidence: 81%

“…Bamwenda et al [22] used UV light to irradiate suspensions of TiO 2 with various Au loadings and monitored H 2 production from a water-ethanol solution. Below are the proposed chemical equations for H 2 evolution.…”

Section: Au/tio 2 Nanoparticlesmentioning

confidence: 99%

“…It is proposed that excitation of electrons at the surface plasmon band of Au could allow for electron transfer to the low-energy CB of TiO 2 , which is photocatalytically inactive with visible light, therefore also providing charge separation [17][18][19][20][21]. Au NP size, dispersion, loading and NP-support interaction all play critical roles in the photocatalytic activity of Au/TiO 2 with all these parameters dependent upon the catalyst preparation methods [17,[22][23][24]. Among the many methods of preparing Au, particle deposition-precipitation of Au onto TiO 2 provides the good interfacial contact necessary for photocatalytic activity from Au/TiO 2 as initially observed by Bamwenda et al [22,24] when comparing various Au/ TiO 2 photocatalyst preparation methods.…”

Section: Au/tio 2 Nanoparticlesmentioning

confidence: 99%

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Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Connelly

Ahmed

Idriss

2012

Mater Renew Sustain Energy

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The review focus is on hydrogen production from renewables using photocatalysis. In particular we focus on the role of synergism on the reaction rate. Among the most studied examples for this phenomenon are catalysts based on TiO 2 . TiO 2 exists in two common phases: anatase and rutile, with the latter more thermodynamically stable. For hydrogen production the photocatalyst is often composed of nano-size precious metals deposited on TiO 2 (such as Pt, Pd, or Au). It has been observed by many researchers over a decade that M/TiO 2 rutile is far less active than M/TiO 2 anatase. Yet, the presence of the two phases together results in considerable enhancement of the reaction rate when compared to M/TiO 2 anatase alone. The main reason for this is the increase of the charge carriers' lifetime allowing for electron transfer to hydrogen ions and hole transfer to oxygen ions (and/or the sacrificial agent used). In this work we review the few proposed models, so far, explaining the way by which this charge transfer occurs across both phases.

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Section: Au/tio 2 Nanoparticlesmentioning

confidence: 81%

Section: Au/tio 2 Nanoparticlesmentioning

confidence: 99%

Section: Au/tio 2 Nanoparticlesmentioning

confidence: 99%

See 1 more Smart Citation

Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Connelly

Ahmed

Idriss

2012

Mater Renew Sustain Energy

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“…These results are in agreement with those reported in the literature. In particular, loading noble metals such as Pt [41] and Au [42] onto the photocatalyst surface can separate photogenerated electrons and holes more effectively and thus improve hydrogen production. In a similar way, the coexistence of Pd with TiO 2 in the Pd-TiO 2 composite photocatalyst may lower the recombination rate between photogenerated electrons and holes, thus improving the efficiency of the photocatalysis process.…”

Section: Influence Of Photocatalyst Formulationmentioning

confidence: 99%

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

Vaiano

Iervolino

Sarno

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-In this work, the simultaneous production of CH 4 and H 2 from photocatalytic reforming of glucose aqueous solution on Pd-TiO 2 catalysts under UV light irradiation by Light-Emitting Diodes (LED) was investigated. The Pd-TiO 2 catalysts were prepared by the photodeposition method. The Pd content was in the range 0.5-2 wt% and a photodeposition time in the range 15-120 min was used. Pd-TiO 2 powders were extensively characterized by X-Ray Diffraction (XRD), S BET , X-Ray Fluorescence spectrometry (XRF), UV-Vis Diffuse Reflectance Spectra (UV-Vis DRS), TEM and X-Ray Photoelectron Spectroscopy (XPS). It was found that the lower Pd loading (0.5 wt%) and 120 min of photodeposition time allowed us to obtain homogeneously distributed metal nanoparticles of small size; it was also observed that the increase in the metal loading and deposition time led to increasing the Pd 0 species effectively deposited on the sulfated TiO 2 surface. Particle size and the oxidation state of the palladium were the main factors influencing the photocatalytic activity and selectivity. The presence of palladium on the sulfated titania surface enhanced the H 2 and CH 4 production. In fact, on the catalyst with 0.5 wt% Pd loading and 120 min of photodeposition time, H 2 production of about 26 lmol was obtained after 3 h of irradiation time, higher than that obtained with titania without Pd (about 8.5 lmol). The same result was obtained for the methane production. The initial pH of the solution strongly affected the selectivity of the system. In more acidic conditions, the production of H 2 was enhanced, while the CH 4 formation was higher under alkaline conditions.Résumé -Production simultanée de CH 4 et H 2 par réformage photocatalytique d'une solution aqueuse de glucose sur un catalyseur Pd-TiO 2 sulfaté -Dans cette recherche, la production simultanée de CH 4 et H 2 par le reformage photocatalytique de glucose sur les catalyseurs Pd-TiO 2 sous irradiation de lumière UV réalisée par des diodes électroluminescentes (LED) a été étudiée. Les échantillons de Pd-TiO 2 ont été préparés par la méthode de photodéposition. Le contenu de Pd était compris entre 0,5-2 % en poids et il a été utilisé un temps de photodéposition dans la gamme 15-20 minutes. Les poudres Pd-TiO 2 ont été caractérisées par diffraction des rayons X (XRD), surface spécifique BET (S BET ), fluorescence X (XRF), spectrométrie UV visible (UV vis DRS), microscopieThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 5, pp. 891-902 Ó V. Vaiano et al., published by IFP Energies nouvelles, 2015 DOI: 10.2516 électronique à transmission (TEM) et spectrométrie photo électronique X (XPS). Il a été constaté que le chargement inférieur de Pd (0,5 % en poids) et 120 minutes de temps d...

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“…Usually, certain amount of active metal (noble metal or transition metal) will be loaded to the TiO 2 support to promote its photoactivity. According to the publications, Cu, Ni, V, Pt, Pd, Rh, Au, Ir, and Ru have been tested [11][12][13][14], among which Pt doped TiO 2 exhibits the highest photoactivity toward hydrogen production from bioethanol. Various synthesis methods have been successfully demonstrated to get TiO 2 supported catalyst with desirable particle size and morphology for hydrogen generation maximization.…”

Section: Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Catalytic Hydrogen Production from Bioethanol

Song

2017

Hydrogen Production Technologies

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Photoassisted hydrogen production from a water-ethanol solution: a comparison of activities of AuTiO2 and PtTiO2

Cited by 593 publications

References 69 publications

Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

Catalytic Hydrogen Production from Bioethanol

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Photoassisted hydrogen production from a water-ethanol solution: a comparison of activities of AuTiO2 and PtTiO2

Cited by 593 publications

References 69 publications

Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Photoreaction of Au/TiO2 for hydrogen production from renewables: a review on the synergistic effect between anatase and rutile phases of TiO2

Simultaneous Production of CH4and H2from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO2Catalysts

Catalytic Hydrogen Production from Bioethanol

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Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts