Topic
Platinum
About: Platinum is a research topic. Over the lifetime, 49675 publications have been published within this topic receiving 1150035 citations. The topic is also known as: Pt & element 78.
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TL;DR: In this article, a theoretical study of methane dissociation and syngas formation on a number of transition metals M (M=Ru, Os, Rh, Ir, Pd, Pt, Cu, Ag, Au) is presented.
204 citations
TL;DR: In this article, Koutecky-Levich analysis made possible to evaluate the kinetics parameters (total number of exchanged electrons, limiting current density, Tafel slope and exchange current density).
204 citations
TL;DR: In this paper, the first electrochemical study of films of C 60 on platinum electrodes was performed and the cyclic voltammetry (CV) of such films in tetra-n-butylammonium [(TBA)AsF 6 ]/MeCN, showing an unusual hysteresis, suggests that large structural or resistive changes occur on reduction
Abstract: We describe the first electrochemical study of films of C 60 on platinum electrodes. The cyclic voltammetry (CV) of such films in tetra-n-butylammonium [(TBA)AsF 6 ]/MeCN, showing an unusual hysteresis, differs from the CV of dissolved C 60 and suggests that large structural or resistive changes occur on reduction
203 citations
TL;DR: The PtCl2-catalyzed cyclization reaction of o-alkynylphenyl acetals 1 in the presence of 1,5-cyclooctadiene produces 3-(alpha-alkoxyalkyl)benzofurans 2 in good to high yields.
Abstract: The PtCl2-catalyzed cyclization reaction of o-alkynylphenyl acetals 1 in the presence of 1,5-cyclooctadiene produces 3-(α-alkoxyalkyl)benzofurans 2 in good to high yields. For example, the reaction of acetaldehyde ethyl 2-(1-octynyl)phenyl acetal (1a), acetaldehyde ethyl 2-(cyclohexylethynyl)phenyl acetal (1c), and acetaldehyde ethyl 2-(phenylethynyl)phenyl acetal (1f) in the presence of 2 mol % of platinum(II) chloride and 8 mol % of 1,5-cyclooctadiene in toluene at 30 °C gave the corresponding 2,3-disubstituted benzofurans 2a, 2c, and 2f in 91, 94, and 88% yields, respectively.
203 citations
TL;DR: In this paper, a pre-doped catalysts, designated as Cu1−xAxFe2O4 (Aǫ: ǫdopant), were studied for the simultaneous NOx-soot removal.
Abstract: Modification of CuFe2O4 catalyst for the simultaneous NOx-soot removal has been studied by doping alkali metals (Li, Na, K, Cs), vanadium and platinum. In pre-doped catalysts, designated as Cu1−xAxFe2O4 (A : dopant), potassium was superior to the other alkali metals and vanadium with respect to enhancing the activity and selectivity to NOx reduction into N2, and the optimum doping level of potassium was x=0.05. Such a promotion effect of potassium was also observed with the impregnated 5 mol% K/CuFe2O4 catalyst. The impregnation of platinum to CuFe2O4 and Cu0.95K0.05Fe2O4 resulted in a decrease in the selectivity to N2 formation with the activity being almost unchanged. The high catalytic performance, especially high selectivity, was realized only when the proper amount of potassium is doped in the Cu–Fe spinel catalyst. XPS analysis showed the segregation (enrichment) of potassium on the surface, and too much doping of potassium might cause the covering of active sites of the Cu–Fe spinel oxide.
203 citations