scholarly journals Preparation and characterization of Ag–Pd bimetallic nano-catalysts in thermosensitive microgel nano-reactor

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18252-18259 ◽  
Author(s):  
Tao Zhang ◽  
Li Li ◽  
Zhishuang Ye ◽  
Qingsong Yang ◽  
Yuchuan Tian ◽  
...  
Keyword(s):  
Bimetallic Nanoparticles ◽  
Nano Catalysts ◽  
Thermosensitive Microgels

Thermosensitive microgels with PS core and cross-linked PNIPA shell were synthesized as nano-reactor to prepare Ag–Pd bimetallic nanoparticles.

Synthesis of Bimetallic AuPt Nanoparticles in Aqueous Solution and Electrocatalytic Activity

2005 ◽  
Vol 900 ◽  
Author(s):  
Peter N. Njoki ◽  
Jin Luo ◽  
Aisley Jacob ◽  
Rizwan Munawar ◽  
Bilal Khan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrocatalytic Activity ◽  
Bimetallic Nanoparticles ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Morphological Properties ◽  
Nanoparticle Catalysts ◽  
Bimetallic Nanoparticle

ABSTRACTThe ability to control composition and size in the synthesis of bimetallic nanoparticles is important for the exploitation of the bimetallic catalytic properties. This paper reports recent findings of an investigation of the synthesis of gold-platinum (AuPt) bimetallic nanoparticles in aqueous solution via reduction of AuCl4− and PtCl42− using a combination of reducing and capping agents. In addition to characterization of the morphological properties of the AuPt nanoparticles using TEM and XRD, the electrocatalytic activity of the carbon-supported AuPt nanoparticle catalysts was also examined for oxygen reduction reaction (ORR) using the rotating disk electrode (RDE) technique. The findings have implications to the design of bimetallic nanoparticle catalysts for fuel cell reactions.

Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction

2009 ◽  
Vol 54 (9) ◽  
pp. 2404-2409 ◽  
Author(s):  
N.R. Elezovic ◽  
B.M. Babic ◽  
V.R. Radmilovic ◽  
Lj.M. Vracar ◽  
N.V. Krstajic
Keyword(s):  
Oxygen Reduction ◽  
Synthesis And Characterization ◽  
Nano Catalysts

Preparation and Characterization of Bimetallic Nanoparticles Ptx-Pd1-x Supported on Silica

2006 ◽  
pp. 559-563
Author(s):  
N. Castillo ◽  
L.A. García ◽  
A. Vázquez Z. ◽  
L. Díaz Barriga ◽  
R. Pérez
Keyword(s):  
Bimetallic Nanoparticles

scholarly journals Bimetallic Nanoparticles as a Model System for an Industrial NiMo Catalyst

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3727
Author(s):  
Sara Blomberg ◽  
Niclas Johansson ◽  
Esko Kokkonen ◽  
Jenny Rissler ◽  
Linnéa Kollberg ◽  
...  
Keyword(s):  
Bimetallic Nanoparticles ◽  
Model System ◽  
Native Oxide ◽  
Oxide Shell ◽  
Industrial System ◽  
Narrow Size Distribution ◽  
Nimo Catalysts ◽  
Further Development ◽  
Industrial Relevance

An in-depth understanding of the reaction mechanism is required for the further development of Mo-based catalysts for biobased feedstocks. However, fundamental studies of industrial catalysts are challenging, and simplified systems are often used without direct comparison to their industrial counterparts. Here, we report on size-selected bimetallic NiMo nanoparticles as a candidate for a model catalyst that is directly compared to the industrial system to evaluate their industrial relevance. Both the nanoparticles and industrial supported NiMo catalysts were characterized using surface- and bulk-sensitive techniques. We found that the active Ni and Mo metals in the industrial catalyst are well dispersed and well mixed on the support, and that the interaction between Ni and Mo promotes the reduction of the Mo oxide. We successfully produced 25 nm NiMo alloyed nanoparticles with a narrow size distribution. Characterization of the nanoparticles showed that they have a metallic core with a native oxide shell with a high potential for use as a model system for fundamental studies of hydrotreating catalysts for biobased feedstocks.

scholarly journals Resonant-XRD Characterization of Nanoalloyed Au-Pd Catalysts for the Direct Synthesis of H2O2: Quantitative Analysis of Size Dependent Composition of the Nanoparticles †

2019 ◽  
Vol 9 (15) ◽  
pp. 2959 ◽  
Author(s):  
Paolo Centomo ◽  
Patrizia Canton ◽  
Claudio Burato ◽  
Carlo Meneghini ◽  
Marco Zecca
Keyword(s):  
Quantitative Analysis ◽  
Metal Nanoparticles ◽  
Metal Surface ◽  
Bimetallic Nanoparticles ◽  
Amorphous Polymer ◽  
Direct Synthesis ◽  
Relative Number ◽  
Pd Catalysts ◽  
X Ray

The focus of this work is on the relationship between the quantitative structural characterization of bimetallic Au-Pd nanoparticles dispersed in an amorphous polymer matrix and their catalytic activity in the direct synthesis of hydrogen peroxide (DS reaction). Resonant X-ray powder diffraction with synchrotron radiation was employed to probe selectively and to reveal fine details of the structure of bimetallic nanoparticles embedded in the support. The semi-quantitative analysis of the resonant X-ray powdered diffraction data, made on a large number of metal nanoparticles, shows that in one of the polymer-supported Au-Pd catalyst for the DS reaction (P75) featured by an overall molar Pd/Au of about 5.54, the smallest metal nanoparticles (MNPs), which account for more than 99.9% of the total MNPs number and for more than 95% of the metal surface, are formed by practically pure palladium. The relative number of bimetallic alloyed nanoparticles is very small (less than 4 × 102 ppm) and they contribute to only about 2% of the total metal surface. In a second gold-enriched catalyst (P50) with an overall molar Pd/Au of 1.84, the proportion of the bimetallic alloyed nanoparticles increased to about 97% and they account for about 99% of the metal surface. As a result of the metal intermixing, the catalytic productivity for the DS reaction increased from 97 to 109 mmolH2O2/molH2, owing to the gold-promotion of palladium.

Synthesis and characterization of Ag–Ni bimetallic nanoparticles by laser-induced plasma

2011 ◽  
Vol 519 (20) ◽  
pp. 7116-7119 ◽  
Author(s):  
Qingmei Xiao ◽  
Zhi Yao ◽  
Jiahong Liu ◽  
Ran Hai ◽  
Hassan Yousefi Oderji ◽  
...  
Keyword(s):  
Bimetallic Nanoparticles ◽  
Synthesis And Characterization ◽  
Laser Induced Plasma

Preparation and characterization of lanthanide modified SAPO-34 nano catalysts and measurement of their activity for methanol to olefin conversion

2014 ◽  
Vol 113 (2) ◽  
pp. 585-603 ◽  
Author(s):  
Taraneh Hajiashrafi ◽  
Ali Nemati Kharat ◽  
Alexander Dauth ◽  
Andrew R. Lewis ◽  
Jennifer A. Love
Keyword(s):  
Olefin Conversion ◽  
Methanol To Olefin ◽  
Nano Catalysts

Elaboration and characterization of bimetallic nanoparticles obtained by laser ablation of Ni75Pd25 and Au75Ag25 targets in water

2010 ◽  
Vol 12 (8) ◽  
pp. 3123-3136 ◽  
Author(s):  
R. Mahfouz ◽  
F. J. Cadete Santos Aires ◽  
A. Brenier ◽  
E. Ehret ◽  
M. Roumié ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Bimetallic Nanoparticles
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