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Mostrando ítems 31-40 de 2065
Pt, PtSn and PtGe catalysts supported on granular carbon for fine chemistry hydrogenation reactions
(Elsevier Science, 2008-04)
Two series of PtSn and PtGe catalysts with different metallic loadings, supported on activated carbon powder, were prepared by successive impregnation. Both the effects of the second metal addition and the Sn or Ge loading ...
Differences in coke burning-off from Pt-Sn/Al2O3 catalyst with oxygen or ozone
(Elsevier Science, 2005-01)
Pt-Sn/γ-Al2O3 catalysts with different Sn loadings were prepared by incipient wetness coimpregnation of γ-Al2O3 with H2PtCl 6 and SnCl2. The Pt-Sn interaction was tested by temperature- programmed reduction and the catalytic ...
Nanostructured Pt and Pt-Sn catalysts supported on oxidized carbon nanotubes for ethanol and ethylene glycol electro-oxidation
(Pergamon-Elsevier Science Ltd, 2011-03)
Pt and Pt-Sn catalysts supported on oxidized carbon nanotubes were prepared by multiple potentiostatic pulses and tested for ethanol and ethylene glycol electro-oxidation in sulfuric acid. The composed nanostructured ...
Metal dispersion and catalytic activity of trimetallic Pt-Re-Sn/Al 2O3 naphtha reforming catalysts
(Elsevier Science, 2005-10)
The chemisorption of CO over mono-, bi- and trimetallic naphtha reforming catalysts containing Pt, Re and Sn in the metallic function was studied. The temperature-programmed reduction (TPR) results show that there are ...
Characteristics of the spontaneous deposition of Sn in polycrystalline Pt
(2012-04)
Spontaneous deposition of tin (Sn) in polycrystalline platinum (Pt pc) from a sulfuric acid solution of tin salts, was evaluated by conventional electrochemical techniques, to determine its characteristics. Tin was deposited ...
Estudo da influência da configuração estrutural de compostos bimetálicos na oxidação de combustíveis utilizados em células a combustível
(Universidade Estadual Paulista (Unesp), 2020-02-27)
Com o intuito de ampliar as fontes de energia por meio de dispositivos eletroquímicos, as células a combustível, o desenvolvimento de eletrocatalisadores que sejam eficientes para a oxidação de combustíveis orgânicos, ...
Effect of the Preparation Method on the Electrocatalytic Activity of Pt-Sn/Nanotubes Catalysts Used in DMFC
(Electrochemical Society, 2017-11)
A series of bimetallic Pt-Sn catalysts supported on multiwalled carbon nanotubes (NT) for methanol oxidation reaction was prepared by different methods that involve ethylene glycol synthesis under reflux conditions and ...
Simultaneous deactivation by coke and sulfur of Pt-Re(Ge,Sn)/Al2O3 catalysts for n-hexane reforming
(Elsevier Science, 2000-04)
The simultaneous deactivation by coke and sulfur of monometallic Pt/Al2O3 and bimetallic Pt–Re(Ge, Sn)/Al2O3 catalysts was studied using n-hexane reforming as bifunctional test reaction and thiophene as poisoning molecule. ...