There remains considerable debate over the active form of gold under operating conditions of a recently validated gold catalyst for acetylene hydrochlorination. We have performed an in situ x-ray absorption fine structure study of gold/carbon (Au/C) catalysts under acetylene hydrochlorination reaction conditions and show that highly active catalysts comprise single-site cationic Au entities who...

Au-Ge alloys are promising materials for high-power and high-frequency packaging, and Ni is frequently used as diffusion barriers. This study investigates interfacial reactions in Au-12Ge/Ni joints at 300 °C and 400 °C. For the reactions at 300 °C, typical interfacial morphology was observed and the diffusion path was (Au) + (Ge)/NiGe/Ni5Ge3/Ni. However, an interesting phenomenon--the formation...

The Au atom in the title compound, [Au(C(10)H(12)NOS)(C(18)H(33)P)], is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S-Au-P = 174.54 (2)°], with the distortion due in part to a close intra-molecular Au⋯O contact [3.1702 (16) Å]. In the crystal structure, mol-ecules are arranged into supra-molecular chains along the b axis mediated by C-H⋯O inter-actions.

The Au atom in the title compound, [Au(C(11)H(14)NOS)(C(18)H(33)P)], is coordinated within an S,P-donor set that defines a slightly distorted linear geometry [S-Au-P = 174.73 (3)°], with the distortion due in part to a close intra-molecular Au⋯O contact [3.060 (3) Å]. In the crystal structure, mol-ecules are arranged in layers in the bc plane with the primary connections between the arrays bein...

In the title compound, [Au(C(9)H(9)N(2)O(3)S)(C(6)H(15)P)], two virtually identical mol-ecules comprise the asymmetric unit. These are connected by Au⋯Au [3.6796 (4) Å] and Au⋯S [3.6325 (18) and 3.5471 (18) Å] contacts, forming a dimeric aggregate. The presence of intra-molecular Au⋯O contacts [2.993 (5) and 2.957 (5) Å] is responsible for the slight deviations from the ideal linear coordinatio...

Bifunctional Au-loaded Fe3O4@C composite microspheres were controllably synthesized by coating of Au nanoparticles (NPs) on the surface of the poly(diallyldimethylammonium chloride) (PDDA) functionalized Fe3O4@C microspheres. The amount of Au loading can be effectively tuned by altering the feeding amounts of solution Au NPs or further growth. The obtained Au-loaded Fe3O4@C composite microspher...

Carbon-supported Pt–Au (Pt–Au/C) catalyst is prepared separately by impregnation, colloidal and micro-emulsion methods, and characterized by physical and electrochemical methods. Highest catalytic activity towards oxygen-reduction reaction (ORR) is exhibited by Pt–Au/C catalyst prepared by colloidal method. The optimum atomic ratio of Pt to Au in Pt–Au/C catalyst prepared by colloidal method is...

Carbon-supported gold nanoparticles (Au/C) are successfully decorated with monoor sub-monolayer palladium atoms with different Pd/Au atomic ratios by a chemically epitaxial seeded growth method. TEM, UV–vis spectrometry and XRD techniques are used to characterize the particle size, dispersion, palladium coverage on gold seeds and crystal structures of the prepared catalysts. Cyclic voltammetric...

In the title compound, [Au(C(5)H(10)NOS)(C(18)H(15)P)], the Au(I) atom is linearly coordinated within an S,P-donor set with distortion from an ideal linear geometry [S-Au-P = 176.71 (6)°] due to an intra-molecular Au⋯O contact [2.943 (4) Å]. In the crystal structure, centrosymmetrically related mol-ecules associate via C-H⋯O inter-actions.