scholarly journals Hierarchical Porous Wood Cellulose Scaffold with Atomically Dispersed Pt Catalysts for Low-Temperature Ethylene Decomposition

ACS Nano ◽  
2019 ◽  
Vol 13 (12) ◽  
pp. 14337-14347 ◽  
Author(s):  
Huizhang Guo ◽  
Peter Warnicke ◽  
Michele Griffa ◽  
Ulrich Müller ◽  
Zupeng Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pt Catalysts ◽  
Wood Cellulose ◽  
Ethylene Decomposition ◽  
Hierarchical Porous

Formation of Pt decorated Ni–Pt nanocubes through low temperature atomic diffusion – time-resolved elemental analysis of nanoparticle formation

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9927-9934 ◽  
Author(s):  
A. Nagao ◽  
K. Higashimine ◽  
J. L. Cuya Huaman ◽  
T. Iwamoto ◽  
T. Matsumoto ◽  
...  
Keyword(s):  
Low Temperature ◽  
Elemental Analysis ◽  
Diffusion Time ◽  
Atomic Diffusion ◽  
Pt Catalysts ◽  
Time Resolved ◽  
Nanoparticle Formation ◽  
The Core ◽  
Temperature Diffusion

Low temperature diffusion of Pt atoms from the core to the corners and edges of the Ni cube results in the preparation of potential novel cage-structured Pt catalysts.

Tunable and selective hydrogenation of furfural to furfuryl alcohol and cyclopentanone over Pt supported on biomass-derived porous heteroatom doped carbon

2017 ◽  
Vol 202 ◽  
pp. 79-98 ◽  
Author(s):  
Xiuyun Liu ◽  
Bo Zhang ◽  
Benhua Fei ◽  
Xiufang Chen ◽  
Junyi Zhang ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Value Added ◽  
Pt Nanoparticles ◽  
Carbon Support ◽  
Carbonization Temperature ◽  
High Dispersion ◽  
Pt Catalysts ◽  
Product Selectivity ◽  
Reaction Products ◽  
Hierarchical Porous

The search for and exploitation of efficient catalytic systems for selective conversion of furfural into various high value-added chemicals remains a huge challenge for green synthesis in the chemical industry. Here, novel Pt nanoparticles supported on bamboo shoot-derived porous heteroatom doped carbon materials were designed as highly active catalysts for controlled hydrogenation of furfural in aqueous media. The porous heteroatom doped carbon supported Pt catalysts were endowed with a large surface area with a hierarchical porous structure, a high content of nitrogen and oxygen functionalities, a high dispersion of the Pt nanoparticles, good water dispersibility and reaction stability. Benefiting from these features, the novel Pt catalysts displayed a high activity and controlled tunable selectivity for furfural hydrogenation to produce furfuryl alcohol and cyclopentanone in water. The product selectivity could be easily modulated by controlling the carbonization temperature of the porous heteroatom doped carbon support and the reaction conditions (temperature and H2 pressure). Under mild conditions (100 °C, 1 MPa H2), furfuryl alcohol was obtained in water with complete conversion of the furfural and an impressive furfuryl alcohol selectivity of >99% in the presence of Pt/NC-BS-500. A higher reaction temperature, in water, favored rearrangement of the furfural (FFA) with Pt/NC-BS-800 as the catalyst, which resulted in a high cyclopentanone yield of >76% at 150 °C and 3 MPa H2. The surface properties and pore structure of the heteroatom doped carbon support, adjusted using the carbonization temperature, might determine the interactions between the Pt nanoparticles, carbon support and catalytic reactants in water, which in turn could have led to a good selectivity control. The effect of different reaction temperatures and reaction times on the product selectivity was also explored. Combined with exploration of the distribution of the reaction products, a reaction mechanism for furfural reduction has been proposed.

scholarly journals The TiO2 topotactic transformation assisted trapping of an atomically dispersed Pt catalyst for low temperature CO oxidation

RSC Advances ◽  
2019 ◽  
Vol 9 (29) ◽  
pp. 16774-16778
Author(s):  
Yunping He ◽  
Xue-Zhi Song ◽  
Feng Ding ◽  
Xiaolan Kang ◽  
Feifei Sun ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Rough Surface ◽  
Pt Catalyst ◽  
Pt Catalysts ◽  
Low Temperature Co Oxidation ◽  
Topotactic Transformation

Atomically dispersed Pt catalysts are deposited on the rough surface of TiO2, which is synthesized via topotactic transformation from a NH4TiOF3 mesocrystal.

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