Rapid and large-scale synthesis of Co3O4 octahedron particles with very high catalytic activity, good supercapacitance and unique magnetic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 104991-105002 ◽  
Author(s):  
Mahabubur Chowdhury ◽  
Oghenochuko Oputu ◽  
Mesfin Kebede ◽  
Franscious Cummings ◽  
Oscar Cespedes ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Catalytic Activity ◽  
Large Scale ◽  
High Catalytic Activity ◽  
Large Scale Synthesis ◽  
Very High

Octahedron Co3O4 particles with very high catalytic activity, good supercapacitance, and unique magnetic properties.

Effect of an Oxides Composite Support of Ce(Sm)O3-La(Sr)CrO3 on Pd-Ni Alloy for Decomposition Activity of CH4

2010 ◽  
Vol 65 ◽  
pp. 215-224
Author(s):  
Ichiro Yamanaka ◽  
Yuta Nabae ◽  
Takeo Ito
Keyword(s):  
Catalytic Activity ◽  
Spherical Shape ◽  
Open Circuit ◽  
Fiber Formation ◽  
Oxidation Catalysis ◽  
High Catalytic Activity ◽  
Composite Anode ◽  
Composite Support ◽  
Ni Alloy ◽  
Very High

A Pd-Ni/La(Sr)CrO3-Ce(Sm)O2 composite anode showed good performance for solid oxide fuel cell reactions with dry CH4. Compositions of Pd and Ni in the Pd-Ni/La(Sr)CrO3-Ce(Sm)O2 composite anode affected the electrochemical oxidation catalysis of dry CH4. The Pd and Ni ratios from 50:50 to 75:25 were suitable for the oxidation. The Pd-Ni/La(Sr)CrO3-Ce(Sm)O2 composite anode showed the high tolerance to the carbon deposition under closed and open circuit conditions. A Pd-Ni/Ce(Sm)O2 catalyst showed very low catalytic activity for decomposition of dry CH4. A Pd-Ni/SiO2 catalyst showed very high catalytic activity for the decomposition of dry CH4 and a large amount of deposited carbon formed. The Pd-Ni particles on SiO2 were quite multifaceted from TEM-EDS observation. On the other hand, the Pd-Ni particles on Ce(Sm)O2 support had a spherical shape and doping of Ce and Sm was confirmed. This nature should inhibit the formation of particular plane that is essential for the carbon fiber formation. The detail function of Ce(Sm)O2 and La(Sr)CrO3 supports was discussed.

scholarly journals Facile synthesis of biomass-based carbon materials nano-Ni-based catalysts and its application in selective hydrogenation of alkynes

2021 ◽  
Author(s):  
Jianguo liu ◽  
Jiangmin Sun ◽  
Longlong Ma
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Carbon Material ◽  
Large Scale ◽  
High Efficiency ◽  
Environmentally Friendly ◽  
Metal Catalyst ◽  
High Catalytic Activity ◽  
Chemical Research ◽  
Nickel Metal

The development of high efficiency, excellent selectivity, and super activity metal catalyst for chemical selective hydrogenation of alkynes to olefin is of great significance in the field of the chemical industry. At the same time, the development of a large number of available base metal catalysts for organic conversion remains an important objective of chemical research. Herein, we report a facile preparation of a simple, high catalytic activity, environmentally friendly, and inexpensive biomass carbon material supported nano-nickel catalyst from lignin residue. The entire preparation process of the catalyst is simple, reliable, economical, and environmentally friendly, which provides a potential utilization prospect for large-scale industrial applications of biomass-based carbon material catalysts. Biomass-based lignin residues can not only reduce the high oxidation state of nickel ions into nickel nanoparticles by the in-situ reducing gas generated during the calcination process, but the mesoporous structure of lignin residue also promotes the adsorption of nickel metal, which greatly improved the catalytic activity of biomass-based Ni-based catalysts. The simple synthetic green, cost-effective and sustainable biomass-based Ni-based catalyst shows good performance in the selective hydrogenation of phenylacetylene, reaching 97.2% conversion and 84.3% styrene selectivity, respectively.

scholarly journals Application of Nanotechnology in Post-treatment of Automobile Tail Gas Nitrogen Oxides

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Xie Yansheng
Keyword(s):  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Good Prospect ◽  
Exhaust Gas ◽  
Automobile Exhaust ◽  
Existing Problems ◽  
Catalytic Materials ◽  
Nano Catalyst ◽  
And Performance ◽  
Very High

Nano-catalyst has a very high catalytic activity and has a good prospect in automobile exhaust gas purifi cation. Thispaper summarizes the research status of nano-scale automobile exhaust gas purifi cation catalytic materials in recentyears, focusing on the analysis of the structure and performance of several components in the tail gas catalyst afternano-scale, and discusses its existing problems and application trends.

LDH-derived catalysts for complete oxidation of volatile organic compounds

Clay Minerals ◽  
1999 ◽  
Vol 34 (1) ◽  
pp. 67-77 ◽  
Author(s):  
K. Bahranowski ◽  
E. Bielańska ◽  
R. Janik ◽  
T. Machej ◽  
E. M. Serwicka
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxide ◽  
Copper Chromite ◽  
Oxide System ◽  
High Catalytic Activity ◽  
Commercial Catalyst ◽  
Volatile Organic ◽  
Double Hydroxides ◽  
Very High

AbstractThe Cu,Cr-, Zn,Cr- and Cu,Al-layered double hydroxides have been synthesized by the coprecipitation method and characterized by elemental analysis, PXRD, SEM/EDS and BET. The mixed oxide materials obtained upon calcination at 873 K show very high catalytic activity for the combustion of toluene and ethanol. The best sample is derived from the Cu,Cr-LDH precursor with a Cu:Cr ratio of 2, composed of copper oxide and copper chromite. This catalyst gave 50% conversion of toluene and ethanol at temperatures of 45 and 15 K lower, respectively, than the reference commercial catalyst. Catalytic tests with a mechanical mixture of CuO and CuCr2O4 demonstrate that the use of an LDH precursor is essential for optimum results. The importance of the simultaneous presence of both Cu and Cr, the influence of the Cu:Cr ratio on the catalytic activity and the role of the interface boundaries in the CuO-CuCr2O4 mixed oxide system are discussed.

Facet-controlled hollow Rh2S3 hexagonal nanoprisms as highly active and structurally robust catalysts toward hydrogen evolution reaction

2016 ◽  
Vol 9 (3) ◽  
pp. 850-856 ◽  
Author(s):  
Donghwan Yoon ◽  
Bora Seo ◽  
Jaeyoung Lee ◽  
Kyoung Sik Nam ◽  
Byeongyoon Kim ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Core Shell ◽  
High Catalytic Activity ◽  
Highly Active ◽  
One Step ◽  
Very High ◽  
Excellent Stability

Hollow Rh2S3 hexagonal nanoprisms, prepared by one-step formation of core–shell nanoprisms followed by the etching of a core, exhibit very high catalytic activity and excellent stability toward hydrogen evolution reaction.

scholarly journals Large-scale synthesis of uniformly loaded cobalt nanoparticles on alumina for efficient clean fuel production

RSC Advances ◽  
2017 ◽  
Vol 7 (15) ◽  
pp. 8852-8857 ◽  
Author(s):  
Ji Chan Park ◽  
Jae In Kwon ◽  
Shin Wook Kang ◽  
Dong Hyun Chun ◽  
Ho-Tae Lee ◽  
...  
Keyword(s):  
Large Scale ◽  
Cobalt Nanoparticles ◽  
Fuel Production ◽  
Clean Fuel ◽  
Co Conversion ◽  
Large Scale Synthesis ◽  
Very High ◽  
Hydrocarbon Productivity

The Co/Al2O3 nanocatalyst prepared with tens of gram scale in a batch, showed good CO conversion (∼76%), very high CTY value (∼1.4 × 10−4 molCO gCo−1 s−1) and remarkable hydrocarbon productivity (∼1.0 gHC gcat−1 h−1) under controlled FTS conditions.

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