High specific surface area LaMO3 (M = Co, Mn) hollow spheres: synthesis, characterization and catalytic properties in methane combustion

RSC Advances ◽  
2014 ◽  
Vol 4 (102) ◽  
pp. 58699-58707 ◽  
Author(s):  
Guangsheng Guo ◽  
Kuo Lian ◽  
Lijuan Wang ◽  
Fubo Gu ◽  
Dongmei Han ◽  
...  
Keyword(s):  
Specific Surface ◽  
Heating Rate ◽  
Surface Area ◽  
Catalytic Properties ◽  
Hollow Spheres ◽  
Methane Combustion ◽  
High Specific Surface Area ◽  
Slow Heating ◽  
Template Method ◽  
Carbon Sphere

LaMO3 (M = Mn, Co) hollow spheres were synthesized by a carbon sphere template method, while a slow heating rate resulted in multishelled hollow spheres.

Alumina aerogel catalysts prepared by two supercritical drying methods used in methane combustion

1995 ◽  
Vol 10 (6) ◽  
pp. 1424-1428 ◽  
Author(s):  
Yasuyuki Mizushima ◽  
Makoto Hori
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Methane Combustion ◽  
Supercritical Drying ◽  
High Specific Surface Area ◽  
The Other ◽  
Drying Methods ◽  
Alumina Aerogel ◽  
Lower Temperature

Palladium-supported alumina aerogels were prepared by two different supercritical drying methods. In one method, an alumina wet gel was dried under supercritical conditions of ethanol in an autoclave. In the other, the aerogel was supercritically dried by extracting ethanol using carbon dioxide in an extractor. The Pd-supported alumina aerogel prepared in the autoclave exhibited a high specific surface area of 112.8 m2/g after firing at 1200 °C for 5 h, while the other had a specific surface area of only 5.2 m2/g due to α-alumina transformation. Their catalytic properties for methane combustion were measured. The Pd-supported alumina aerogel prepared in the autoclave combusts methane perfectly at 50–60 °C lower temperature than the other. Palladium particles on the alumina aerogel prepared in the autoclave contained palladium oxide, while those prepared in the CO2 extractor contained only palladium metal.

Characterization, pillaring and catalytic properties of a saponite from Vicálvaro, Madrid, Spain

Clay Minerals ◽  
1997 ◽  
Vol 32 (1) ◽  
pp. 41-54 ◽  
Author(s):  
B. Casal ◽  
J. Merino ◽  
E. Ruiz-Hitzky ◽  
E. Gutierrez ◽  
A. Alvarez
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
High Selectivity ◽  
Catalytic Properties ◽  
High Specific Surface Area ◽  
Gasoline Fraction ◽  
Gas Oil ◽  
Lacustrine Environment ◽  
Alkylation Of Benzene ◽  
Catalytic Performances

AbstractThe characterization, pillaring ability and some catalytic properties of a saponite from the Vicálvaro deposit of Tolsa, located in Madrid have been studied. This mineral is associated with sepiolite in the same lacustrine environment. The raw saponite presents, as special characteristics, high specific surface area (>200 m2/g) and a high percentage of tetrahedral Al (90% of the total Al in the sample). Natural saponite gives rise to high conversions when used as a catalyst in the reaction of alkylation of benzene with 1-dodecene. Increased catalytic performances are obtained over the alumina-pillared saponite derivatives. These materials have also been tested in the cracking of gas-oil (microactivity test), giving good conversions and high selectivity towards the gasoline fraction, especially the pillared forms.

Effects of A-site non-stoichiometry in YxInO3+δ on the catalytic performance during methane combustion

2017 ◽  
Vol 19 (45) ◽  
pp. 30418-30428 ◽  
Author(s):  
Yihong Xiao ◽  
Wanlu Zhu ◽  
Guohui Cai ◽  
Meilian Chen ◽  
Yong Zheng ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Oxygen Vacancies ◽  
Methane Combustion ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Perovskite Catalyst ◽  
Gel Combustion ◽  
A Site

A novel non-stoichiometric YxInO3+δ (YIO-x, 0.8 ≤ x ≤ 1.04) perovskite catalyst with a large number of oxygen vacancies and high specific surface area was synthesized using glycine self-propagating gel combustion.

scholarly journals Nanoporous Quasi-High-Entropy Alloy Microspheres

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 345 ◽  
Author(s):  
Lianzan Yang ◽  
Yongyan Li ◽  
Zhifeng Wang ◽  
Weimin Zhao ◽  
Chunling Qin
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Hierarchical Porous

High-entropy alloys (HEAs) present excellent mechanical properties. However, the exploitation of chemical properties of HEAs is far less than that of mechanical properties, which is mainly limited by the low specific surface area of HEAs synthesized by traditional methods. Thus, it is vital to develop new routes to fabricate HEAs with novel three-dimensional structures and a high specific surface area. Herein, we develop a facile approach to fabricate nanoporous noble metal quasi-HEA microspheres by melt-spinning and dealloying. The as-obtained nanoporous Cu30Au23Pt22Pd25 quasi-HEA microspheres present a hierarchical porous structure with a high specific surface area of 69.5 m2/g and a multiphase approximatively componential solid solution characteristic with a broad single-group face-centered cubic XRD pattern, which is different from the traditional single-phase or two-phase solid solution HEAs. To differentiate, these are named quasi-HEAs. The synthetic strategy proposed in this paper opens the door for the synthesis of porous quasi-HEAs related materials, and is expected to promote further applications of quasi-HEAs in various chemical fields.

KCl-assisted activation: Moringa oleifera branch-derived porous carbon for high performance supercapacitor

2021 ◽  
Vol 45 (12) ◽  
pp. 5712-5719
Author(s):  
Yongxiang Zhang ◽  
Peifeng Yu ◽  
Mingtao Zheng ◽  
Yong Xiao ◽  
Hang Hu ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Porous Carbon ◽  
High Performance ◽  
Moringa Oleifera ◽  
High Specific Surface Area ◽  
Porous Carbons

Porous carbons with a high specific surface area (2314–3470 m2 g−1) are prepared via a novel KCl-assisted activation strategy for high-performance supercapacitor.

Carbon material with high specific surface area and high pseudocapacitance: Possible application in supercapacitors

2021 ◽  
Vol 319 ◽  
pp. 111063
Author(s):  
Yury M. Volfkovich ◽  
Valentin E. Sosenkin ◽  
Alexei Y. Rychagov ◽  
Alexandr V. Melezhik ◽  
Alexei G. Tkachev ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Material ◽  
High Specific Surface Area

Efficient conversion of CO2 to methane using thin-layer SiOx matrix anchored nickel catalysts

2019 ◽  
Vol 43 (33) ◽  
pp. 13217-13224 ◽  
Author(s):  
Xieyi Huang ◽  
Peng Wang ◽  
Zhichao Zhang ◽  
Shaoning Zhang ◽  
Xianlong Du ◽  
...  
Keyword(s):  
Thin Layer ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Geometric Structure ◽  
Nickel Catalysts ◽  
High Specific Surface Area ◽  
Efficient Conversion

Thin-layer SiOx matrix anchored nickel catalysts with high specific surface area and a unique electronic/geometric structure were fabricated for efficient CO2 methanation.

Sign in / Sign up

Export Citation Format

Share Document