Hydrogenation of CO2 over gold supported on metal oxides

Sakurai, Hiroaki; Tsubota, Susumu; Haruta, Masatake

doi:10.1016/0926-860x(93)80224-e

Cited by 153 publications

(96 citation statements)

References 9 publications

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“…금-금속산화 물질을 제조하기 위하여, 증착 및 석출 그리고 금속 이온 주입 및 소성의 방법들이 이용되었다 [9][10][11]. 이 접근법들은 금 입자들이 이산화지르코늄표면에 직접 증착을 가능하도록 하나, 몇 가지 문제점들을 야기한다.…”

Section: 서 론unclassified

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

Park

2014

Korean Chemical Engineering Research

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− It is investigated that that the physical properties of Glutathione layer formed on gold surfaces may make an effect on the distribution of either gold particle adsorbed to the ZrO 2 surface or vice versa with the adjustment of the electrostatic interactions. For the investigation, the atomic force microscope (AFM) was used to measure the surface forces between the surfaces as a function of the salt concentration and pH value. The forces were quantitatively analyzed with the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory to estimate the surface potential and charge density of the surfaces for each condition of salt concentration and pH value. The estimated-value dependence on the salt concentration was described with the law of mass action, and the pH dependence was explained with the ionizable groups on the surface. The salt concentration dependence of the surface properties, found from the measurement at pH 4 and 8, was consistent with the prediction from the law. It was found that the Glutathione layer had higher values for the surface charge densities and potentials than the zirconium dioxide surfaces at pH 4 and 8, which may be attributed to the ionized-functional-groups of the Glutathione layer.

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Section: 서 론unclassified

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

Park

2014

Korean Chemical Engineering Research

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“…57 Our findings are in agreement with previous experimental studies where it was found that the NO reduction on gold based catalysts at moderate temperatures started only if hydrogen species were available. 51,58,59 All of these suggestions must be handled with caution since the reaction of NO dissociation, as other steps in the reaction of NO reduction, was found to be structure sensitive, 21,50,[60][61][62][63][64][65][66][67] i.e., is influenced by intrinsic specificities of the catalyst surfaces considered (e.g., special sites close to undercoordinated atoms).…”

Section: Introductionmentioning

confidence: 99%

A DFT study of the NO dissociation on gold surfaces doped with transition metals

Fajín

Cordeiro

Gomes

2013

The Journal of Chemical Physics

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The NO dissociation on a series of doped gold surfaces (type TM n @Au(111) or TM n @Au(110), with TM n = Ni, Ir, Rh, or Ag and referring n to the number of dopant atoms per unit cell) was investigated through periodic density functional theory calculations. Generally, doping of Au (111) and Au(110) matrices was found to strengthen the interaction with NO species, with the exception of Ag, and was found to increase the energy barrier for dissociation, with the exception of Ni on Au(111). The calculations suggest that the NO dissociation is only possible in the case of the Ir@Au(110) bimetallic surface but only at high temperatures. The increase of the contents of Ir on Au(110) was found to improve significantly the catalytic activity of gold towards the NO dissociation (E act = ∼1 eV). Nevertheless, this energy barrier is almost the double of that calculated for NO dissociation on pure Ir(110). However, mixing the two most interesting dopant atoms resulted in a catalyst model of the type Ir@Ni(110) that was found to decrease the energy barrier to values close to those calculated for pure Ir surfaces, i.e., ∼0.4 eV, and at the same time the dissociation reaction became mildly exothermic.

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“…6 Different approaches were used in the past to prepare gold/oxide catalyst materials such as metal ion impregnation and deposition-precipitation followed by drying, calcinations, and reduction. [7][8][9] These procedures lead to the formation of gold particles or clusters on the support. However, these approaches have some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Properties of N-Acetyl-Cysteine-Coated Gold Surfaces Interacting with ZrO₂Surfaces

Park

2012

Bulletin of the Korean Chemical Society

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The coating N-acetyl cysteine (NAC) on gold surfaces may be used to design the distribution of either gold particle adsorbed to the ZrO 2 surface or vice versa by adjusting the electrostatic interactions. In this study, it was performed to find out electrostatic properties of the NAC-coated-gold surface and the ZrO 2 surface. The surface forces between the surfaces were measured as a function of the salt concentration and pH value using the AFM. By applying the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory to the surface forces, the surface potential and charge density of the surfaces were quantitatively acquired for each salt concentration and each pH value. The dependence of the potential and charge density on the concentration was explained with the law of mass action, and the pH dependence was with the ionizable groups on the surface.

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Hydrogenation of CO2 over gold supported on metal oxides

Cited by 153 publications

References 9 publications

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

A DFT study of the NO dissociation on gold surfaces doped with transition metals

Electrostatic Properties of N-Acetyl-Cysteine-Coated Gold Surfaces Interacting with ZrO₂Surfaces

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Hydrogenation of CO2 over gold supported on metal oxides

Cited by 153 publications

References 9 publications

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO2

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO2

A DFT study of the NO dissociation on gold surfaces doped with transition metals

Electrostatic Properties of N-Acetyl-Cysteine-Coated Gold Surfaces Interacting with ZrO2Surfaces

Contact Info

Product

Resources

About

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO₂

Electrostatic Properties of N-Acetyl-Cysteine-Coated Gold Surfaces Interacting with ZrO₂Surfaces