scholarly journals Formation of Pt–Ag alloy on different silicas – surface properties and catalytic activity in oxidation of methanol

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9534-9544 ◽  
Author(s):  
Joanna Wisniewska ◽  
Maria Ziolek
Keyword(s):  
Catalytic Activity ◽  
Surface Properties ◽  
Methanol Oxidation ◽  
Methyl Formate ◽  
Oxidation Of Methanol

Pt–Ag alloy is formed on silicas if Ag/Pt ≥ 2.5 and gives the highest methyl formate selectivity in methanol oxidation.

Highly active Au–Pd nanoparticles supported on three-dimensional graphene–carbon nanotube hybrid for selective oxidation of methanol to methyl formate

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44835-44839 ◽  
Author(s):  
Ruiyi Wang ◽  
Zhiwei Wu ◽  
Guofu Wang ◽  
Zhangfeng Qin ◽  
Chengmeng Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
High Activity ◽  
Selective Oxidation ◽  
Methanol Oxidation ◽  
Methyl Formate ◽  
Three Dimensional ◽  
Pd Nanoparticles ◽  
Oxidation Of Methanol ◽  
Highly Active

Carbon nanotubes inserted in graphene give the Au–Pd/Gr–CNT catalyst high activity in methanol oxidation to methyl formate.

Preparation of Nanosized Pt-Au Alloy Catalyst and Its Activity in Methanol Oxidation

2007 ◽  
Vol 7 (11) ◽  
pp. 4073-4076 ◽  
Author(s):  
Ki-Joong Kim ◽  
Yong-Hwa Kim ◽  
Woon-Jo Jeong ◽  
Seung-Won Jeong ◽  
Jong-Che Park ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Flow Reactor ◽  
Metal Catalyst ◽  
Deposition Method ◽  
Oxidation Activity ◽  
Preparation Methods ◽  
Oxidation Of Methanol ◽  
Alloy Catalyst

The alloy catalyst has been widely used because it will be able to improve the activity and selectivity of the single metal catalyst in a given chemical reaction. In this study, the preparation and characteristics of nanosized Pt and Au particles on alumina and their catalytic activity were described. Nanosized Pt–Au catalysts were prepared by impregnation (IMP) method and deposition (DP) method using alumina or ZnO/Al2O3 as support. The size of Pt and Au particles were observed by transmission electron microscopy (TEM), energy dispersive spectroscope (EDS), and X-ray diffraction (XRD). Catalytic activity for oxidation of methanol was measured using a flow reactor. It could be seen that the Pt particle size and dispersion in the alloy catalysts was rarely influenced by preparation methods and Au particles coated by deposition method were well dispersed. TEM images showed that Au particles were well dispersed in the Pt/Au/ZnO/Al2O3 catalyst of which Au particles was supported by deposition method. The catalytic activity for methanol are given in the order of Pt-Au[IMP]/ZnO/Al2O3 > Pt[IMP]/Au[DP]/ZnO/Al2O3 > Au[DP]/Pt[IMP]/ZnO/Al2O3 > Pt-Au[DP]/ZnO/Al2O3. Therefore, Au particle size was doing not play an important role in increasing the oxidation activity, but the Au particles may promote the methanol oxidation.

Electrocatalytic Oxidation of Methanol on an Pd/Pyy/Niad-atoms Electrode

2013 ◽  
Vol 10 (5) ◽  
Author(s):  
Mohamed Abdelfattah Ibrahim ◽  
Taha Hanfy ◽  
A. A. Al-Ghamdi ◽  
Farid El-Tantawy ◽  
Hossam S. Rageb
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Electrocatalytic Oxidation ◽  
Oxidation Of Methanol

In this paper we study the effect of Niad-atoms on the activity of a Pd/Pyy nanocomposite anode, we find that the catalytic activity of an anode towards methanol oxidation increased by threefold in the presence of Niad-atoms.

Catalytic Activity of Porous Pd-Ni Thin Foam towards Electrooxidation of Methanol

2013 ◽  
Vol 16 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Ming Jin ◽  
Houyi Ma
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Low Cost ◽  
Nickel Content ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Oxidation Of Methanol ◽  
One Step ◽  
Dynamic Template ◽  
Electrooxidation Of Methanol

Porous Pd-Ni thin foam was fabricated by a rapid one-step electrodeposition process within hydrogen bubble dynamic template and characterized by SEM, EDS, and cyclic voltammetry. Morphology and composition of the foam can be modified significantly by applying different deposition conditions, such as concentration ratio of Pd (II) ions to Ni (II) ions in electrolytic solution and deposition time. Electrocatalytic activities of the foam towards methanol oxidation in alkaline media were investigated, which depend mainly on Pd components and its morphology. Low nickel content can assist Pd further enhance the electrocatalytic performance, particularly the tolerance to intermediates of methanol oxidation, while high nickel content brings adverse effect. The high catalytic activity and the low cost of the Pd-Ni foams enable them to be promising electrocatalysts for the oxidation of methanol in alkaline media.

Mn-Mo-O Catalysts for Methanol Oxidation. II. Oxidation of Methanol

1992 ◽  
Vol 57 (12) ◽  
pp. 2539-2547 ◽  
Author(s):  
Krasimir Ivanov ◽  
Penka Litcheva ◽  
Dimitar Klissurski
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Effect Of Temperature ◽  
Second Step ◽  
Gas Mixture ◽  
Direct Oxidation ◽  
Step Process ◽  
Oxidation Of Methanol ◽  
Small Excess

The catalytic properties of MnMoO4-based catalysts toward methanol oxidation are investigated. The effect of temperature, flow rate and gas mixture composition on the catalytic activity is established. The highest activity and selectivity (comparable with those of industrial catalysts) of the samples obtained by precipitation in the presence of a small excess of MoO3 was found. The oxidation of methanol on MnMoO4-based catalyst is proposed to be a two-step process. The first step includes methanol interaction with Mo(VI) and reduction of Mo(VI) to Mo(V) (Mo(IV)). The second step consists in direct oxidation of the reduced molybdenum by oxygen from the alcohol-air mixture.

scholarly journals A platinum promoted Ag/SBA-15 catalyst effective in selective oxidation of methanol – design and surface characterization

RSC Advances ◽  
2020 ◽  
Vol 10 (25) ◽  
pp. 14570-14580
Author(s):  
Joanna Wisniewska ◽  
Izabela Dziedzic ◽  
Maria Ziolek
Keyword(s):  
Surface Properties ◽  
Selective Oxidation ◽  
Surface Characterization ◽  
Methyl Formate ◽  
Catalytic Properties ◽  
Pt Catalysts ◽  
Oxidation Of Methanol

The aim of this study was better understanding of surface properties of Ag–Pt catalysts and to verify if addition of platinum promoter to silver loaded on SBA-15, would improve the catalytic properties of Ag–Pt materials in selective oxidation of methanol to methyl formate.

Effects of Microwave-synthesizing Parameters on Structure and Electro-catalytic Activity of Pt2Mo/C towards Methanol Oxidation

2010 ◽  
Vol 25 (4) ◽  
pp. 359-364 ◽  
Author(s):  
Xin ZENG ◽  
Xian-Xia YUAN ◽  
Xiao-Yun XIA ◽  
Juan DU ◽  
Hui-Juan ZHANG ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Electro Catalytic Activity

CuO/TiO2 heterojunction composites: an efficient photocatalyst for selective oxidation of methanol to methyl formate

2019 ◽  
Vol 7 (5) ◽  
pp. 2253-2260 ◽  
Author(s):  
Quanquan Shi ◽  
Guicheng Ping ◽  
Xiaojia Wang ◽  
Hui Xu ◽  
Jingmei Li ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Methyl Formate ◽  
Photo Oxidation ◽  
Oxidation Of Methanol

This study demonstrates the synthesis of an efficient photocatalyst, CuO/TiO2 heterojunction, for selective aerobic photo-oxidation of methanol to methyl formate.

Sign in / Sign up

Export Citation Format

Share Document