Gold, silver and copper catalysts supported on TiO2 for pure hydrogen production

Boccuzzi, F.; Chiorino, A.; Manzoli, Maela; Andreeva, D.; Tabakova, T.; Ilieva, L.; Iadakiev, V.

doi:10.1016/s0920-5861(02)00060-3

Cited by 159 publications

(72 citation statements)

References 23 publications

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“…Although the Au/TiO 2 catalyst is known to be very active for CO oxidation a major setback is that the catalyst is active over a short period of time due to deactivation at low temperatures. It is clear that the majority of studies on gold/titania by far have involved the use of commercial Degussa P25 titania, essentially a mixture of anatase and rutile, though some work with titania from other sources has been reported [13,[21][22][23][24][25][26][27]. Systematic investigations of titania polymorphs are much rarer and the role of support morphology has been the subject of few studies.…”

Section: Introductionmentioning

confidence: 99%

Potassium Titanate: An Alternative Support for Gold Catalyzed Carbon Monoxide Oxidation?

et al. 2008

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It has been found that gold supported on potassium titanate, KTiO 2 (OH) can, under some circumstances, exhibit a superior performance for the oxidation of carbon monoxide, relative to that obtained with titania as a support. It appears that the dispersions of gold on the two types of support are sufficiently similar that other factors are responsible for the improved activity noted. It may be that the higher basic character and/or detailed structural features of the titanate surface plays a role.

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Section: Introductionmentioning

confidence: 99%

Potassium Titanate: An Alternative Support for Gold Catalyzed Carbon Monoxide Oxidation?

et al. 2008

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“…Many research papers have reported that noble metal surface modification could improve the reaction activity of TiO 2 catalyst [18,19]. In this study, the gold-modified under visible light illumination.…”

Section: Pc/pec Degradation Of Bpa Under Uv/visible Illumination Withmentioning

confidence: 93%

Degradation of bisphenol A in aqueous solution by H2O2-assisted photoelectrocatalytic oxidation

Xie

2006

Journal of Hazardous Materials

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“…Gold parts used in electronic microcircuits might be subject to surface changes entailing far-reaching consequences for their quality. The activity of catalysts containing Au and its alloys with other metals depends heavily on the surface condition [3]. It should be noted that the role of sulfur interaction with gold's surface or its nanoparticles is of a dual nature.…”

Section: Introductionmentioning

confidence: 99%

Contrasting Surficial Composition of Native Gold from Two Different Types of Gold Ore Deposits

et al. 2017

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Native gold grains sampled at two different gold ore deposits in Eastern Russia have been studied by the techniques of electron spectroscopy (X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES)), electron microprobe analysis (EMPA), and scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDX). The high-fineness gold of the deposit hosted by relatively high temperature gold-quartz-sulfide mesothermal ore formation contains no oxidized Au constituents on grain surfaces, whereas the less fine gold of the epithermal Au-Ag deposit contains gold oxidized to the Au (I) state, or higher, in half of the cases. At this deposit the surface of native Au consists of a thin layer (~15 nm) with elevated Ag and S contents and an underlying SiO 2 -containing layer~30-60 nm thick. Such a composite coating can perform a protective function and prevent the gold-silver sulfides in surficial parts of AuAg grains from oxidation. The sulfur-enriched marginal parts of native gold particles do not always correlate with the stoichiometry of well-known binary AuAg-sulfides and have a variable composition. This may be due to the existence of solid solutions, Ag 2−x Au x S, if there is enough S or S adsorption-stabilized cluster agglomerates, Ag n Au m S, under sulfur deficit. The effect of the formation of nano-scale surficial zonality on the surface of native gold is quite common in nature and applicable to geological exploration and technology of gold-ore processing. It can facilitate establishing the geochemical environment and genetic type of Au mineralization.

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Gold, silver and copper catalysts supported on TiO2 for pure hydrogen production

Cited by 159 publications

References 23 publications

Potassium Titanate: An Alternative Support for Gold Catalyzed Carbon Monoxide Oxidation?

Potassium Titanate: An Alternative Support for Gold Catalyzed Carbon Monoxide Oxidation?

Degradation of bisphenol A in aqueous solution by H2O2-assisted photoelectrocatalytic oxidation

Contrasting Surficial Composition of Native Gold from Two Different Types of Gold Ore Deposits

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