Preparation and Selective Acetylene Hydrogenation Catalytic Properties of Supported Pd Catalyst by the in Situ Precipitation−Reduction Method

2011 ◽  
Vol 115 (17) ◽  
pp. 8693-8701 ◽  
Author(s):  
Xiao-Yan Ma ◽  
Yuan-Yuan Chai ◽  
David G. Evans ◽  
Dian-Qing Li ◽  
Jun-Ting Feng
Keyword(s):  
Reduction Method ◽  
Catalytic Properties ◽  
Pd Catalyst ◽  
Acetylene Hydrogenation ◽  
Precipitation Reduction ◽  
Supported Pd

In situ synthesis of Ni nanofibers via vacuum thermal reduction and their efficient catalytic properties for hydrogen generation

2018 ◽  
Vol 6 (24) ◽  
pp. 11370-11376 ◽  
Author(s):  
Qinglong Fu ◽  
Pan Yang ◽  
Jingchuan Wang ◽  
Hefang Wang ◽  
Lijun Yang ◽  
...  
Keyword(s):  
Reduction Method ◽  
Hydrogen Generation ◽  
Catalytic Properties ◽  
Decomposition Reaction ◽  
Thermal Reduction ◽  
In Situ Synthesis ◽  
Hydrazine Decomposition

Ni nanofibers have been prepared by a vacuum thermal reduction method, and further used as efficient catalysts for hydrogen generation from hydrous hydrazine decomposition reaction.

Synthesis and Characterization of Poly(2-acrylamido-2-methyl propyl sulfonic acid-co-2-hydroxyethyl methclate)/ Silver Nanoparticle Composite Hydrogel as Catalysts for the Reduction of 4-Nitrophenol

2014 ◽  
Vol 809-810 ◽  
pp. 59-66
Author(s):  
Yun Long Li ◽  
Bin Huang Liu ◽  
Song Bai Lin
Keyword(s):  
Sulfonic Acid ◽  
Reduction Method ◽  
Catalytic Properties ◽  
Reduction Reaction ◽  
Composite Hydrogel ◽  
Synthesis And Characterization ◽  
In Situ Reduction ◽  
End Group

A novel kind of AgNPs catalyst was synthesized by in-situ reduction method using poly(2-acrylamido-2-methyl propyl sulfonic acid-co-2-hydroxyethyl methclate) [short as P(AMPS-co-HEMA)] hydrogel as matrices and AgNO3as a metal precursor. The structure of the composite hydrogel was characterized by Scan Electrical Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that AgNPs were binded with end group and most of the particles were isolated and uniformly distributed on the P(AMPS-co-HEMA). The catalytic properties in the reduction reaction of 4-nitrophenol(shorted as 4-NP) to 4-aminophenol(shorted as 4-AP) were studied in detail, and the result showed that conversion rate and conversion efficiency attained 97.56% and 0.9671 mmol/g·min when the amount of AgNPs was 9mg, [NaBH4] was 2.0×10−1mol/L, [4-NP] was 2.0×10−2mol/L and the total volume of solution was 50 mL, respectively.

The Performance of Highly Dispersed Au-Pd/ZrO2 Catalyst for Base-Free Synthesis N-Benzylidenebenzylamine

2014 ◽  
Vol 955-959 ◽  
pp. 498-501
Author(s):  
Wu Lan Ao ◽  
Mei Lin Jia ◽  
Yong Sheng Bao
Keyword(s):  
Reduction Method ◽  
Catalytic Properties ◽  
Reducing Agent ◽  
High Dispersion ◽  
Pd Catalyst ◽  
Highly Dispersed ◽  
Uv Visible ◽  
Protection Agent ◽  
Dispersion Composition ◽  
Alloy Catalyst

A series of Au/ZrO2, Pd/ZrO2, Au-Pd/ZrO2catalysts were prepared by the solution reduction method using NaBH4as reducing agent and L-lysine as protection agent. UV-Visible and XRD were employed to investigate the dispersion, composition and catalytic properties of the catalyst. The results show that Au-Pd/ZrO2alloy catalyst with high dispersion display higher activity than monometallic Au, monometallic Pd catalyst for the base-fee synthesis of N-Benzylidenebenzylamine.

Formation and oxidation mechanisms of Pd–Zn nanoparticles on a ZnO supported Pd catalyst studied by in situ time-resolved QXAFS and DXAFS

2012 ◽  
Vol 14 (7) ◽  
pp. 2152-2158 ◽  
Author(s):  
Yohei Uemura ◽  
Yasuhiro Inada ◽  
Yasuhiro Niwa ◽  
Masao Kimura ◽  
Kyoko K. Bando ◽  
...  
Keyword(s):  
Pd Catalyst ◽  
Time Resolved ◽  
Oxidation Mechanisms ◽  
Zn Nanoparticles ◽  
Supported Pd

INFLUENCE OF PRETREATMENT ON THE STRUCTURAL AND CATALYTIC PROPERTIES OF SUPPORTED Pd CATALYSTS FOR CO OXIDATION

2013 ◽  
Vol 20 (02) ◽  
pp. 1350013 ◽  
Author(s):  
CUN WEN ◽  
YI LIU ◽  
YUN GUO ◽  
YANQIN WANG ◽  
GUANZHONG LU
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Catalytic Properties ◽  
Active Oxygen Species ◽  
Pd Catalysts ◽  
Pd Dispersion ◽  
Supported Pd Catalysts ◽  
In Situ Drift ◽  
Supported Pd

The effects of pretreating atmospheres ( H2 , O2 and Ar ) on the activity for CO oxidation and Pd dispersion of Pd/Pr6O11 catalyst were investigated. The result shows after the Pd/Pr6O11 catalyst was pretreated by hydrogen or oxygen at 550°C, its catalytic activity for CO oxidation can obviously increase, and the activity of H2 -pretreated catalyst is superior to that of O2 -pretreated catalyst, which is attributed to an increase of Pd dispersion. The catalyst pretreated by Ar behaves the worst catalytic activity for CO oxidation. The results of CO pulse, CO chemisorption and in situ DRIFT testing indicate that the surface species (hydroxyl species or active oxygen species) generated during pretreating processes can prevent Pd particles from immigrating and sintering, resulting in an increase of the Pd dispersion on the surface of support.

Phenol In Situ Hydrogenation with Carbon Nanotube-Supported Pd Catalyst

2014 ◽  
Vol 934 ◽  
pp. 60-64 ◽  
Author(s):  
Ling Niao Kong ◽  
Ya Ru Huang ◽  
Yin Jun Fang
Keyword(s):  
Activated Carbon ◽  
Carbon Nanotube ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Pd Catalyst ◽  
Pd Catalysts ◽  
Metal Precursor ◽  
Supported Pd Catalysts ◽  
Supported Pd

Carbon nanotube (CNT) and activated carbon (AC)-supported Pd catalysts have been prepared by impregnation and reduction-precipitation method using chloropalladate acid as metal precursor. The catalytic performance for phenol in-situ hydrogenation was evaluated under 493 K, 3.5MPa. The results show that Pd/CNTs catalyst has higher selective for phenol in-situ hydrogenation to cyclohexanone. The catalysts have been characterised by CO-TPD and TEM. The mesoporosity structure and inner hollow cavities of Pd/CNTs catalyst are responsible for the distinguished properties.

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