Results 251 to 260 of about 82,764 (294)

Improving cobalt catalysts

Science, 2015
Electrochemistry Tethering molecular catalysts together is a tried and trusted method for making them easier to purify and reuse. Lin et al. now show that the assembly of a covalent organic framework (COF) structure can also improve fundamental catalytic performance. They used cobalt porphyrin complexes as building blocks for a COF.
openaire   +1 more source

Cobalt Polyoxometalates as Heterogeneous Water Oxidation Catalysts

Inorganic Chemistry, 2013
An insoluble salt of the water oxidation catalyst [Co9(H2O)6(OH)3(HPO4)2(PW9O34)3](16-) (Co9) has been used to modify amorphous carbon paste electrodes. The catalytic activity of this polyoxometalate is maintained in the solid state. Good catalytic rates are reached at reasonable overpotentials.
J. Soriano-López, S. Goberna-Ferrón, L. Vigara, J. J. Carbó, J. M. Poblet, J. R. Galan-Mascaros   +5 more
openaire   +2 more sources

Cobalt selenium oxohalides: catalysts for water oxidation

Dalton Trans., 2014
Two new oxohalides Co4Se3O9Cl2 and Co3Se4O10Cl2 have been synthesized by solid state reactions.
Faiz, Rabbani, Henrik, Svengren, Iwan, Zimmermann, Shichao, Hu, Tanja, Laine, Wenming, Hao, Björn, Akermark, Torbjörn, Akermark, Mats, Johnsson   +8 more
openaire   +2 more sources

Hydroxyapatite supported cobalt catalysts for hydrogen generation

Journal of Colloid and Interface Science, 2013
The controlled generation of H(2) from storage materials by using an efficient catalytic support is a highly sought after technology; however, the majority of successes utilize expensive materials considered unfeasible. In our report on the creation of a novel, durable, and inexpensive catalytic support material for hydrogen generation, we examine a ...
Justyn Wayne, Jaworski, Sunghwa, Cho, Yeoungyong, Kim, Jong Hwa, Jung, Hyo Sang, Jeon, Byoung Koun, Min, Ki-Young, Kwon   +6 more
openaire   +2 more sources

Cobalt species in promoted cobalt alumina-supported Fischer–Tropsch catalysts

Journal of Catalysis, 2007
The structure of cobalt species at different stages of the genesis of monometallic and Pt-promoted cobalt alumina-supported Fischer–Tropsch catalysts was studied using X-ray diffraction, UV–visible spectroscopy, in situ X-ray absorption, in situ magnetic method, X-ray photoelectron spectroscopy, and DSC–TGA thermal analysis. The catalysts were prepared
W CHU, P CHERNAVSKII, L GENGEMBRE, G PANKINA, P FONGARLAND, A KHODAKOV   +5 more
openaire   +1 more source

Carbon monoxide hydrogenation on cobalt/alumina and cobalt/NaX catalysts

Applied Catalysis, 1991
Abstract The synthesis of hydrocarbons from catalytic hydrogenation of carbon monoxide was investigated over Co/Al 2 O 3 and Co/NaX catalysts at 1 atm, 493–553 K, H 2 /CO = 2, and gas hourly space velocity (GHSV) = 1200. These catalysts were characterized by hydrogen chemisorption. X-ray diffraction (XRD), and temperature-programmed reduction.
Wei-Jye Wang, Yu-Wen Chen
openaire   +1 more source

Sol?gel synthesis of cobalt?niobia catalysts

Solid State Ionics, 1997
Cobalt-niobia catalysts were prepared using different variants of the colloidal sol-gel technique and wetness impregnation. Characterization of these catalysts by XRD, FT-IR, XPS and TEM showed that phases structure as well as superficial composition depended on the preparation route. It was found that niobia exhibits a strong metal support interaction
openaire   +1 more source

CO2 hydrogenation over cobalt-containing catalysts

Kinetics and Catalysis, 2015
Carbon dioxide hydrogenation over catalysts consisting of 0.56–45 wt % cobalt supported on carbon nanotubes (CNTs), carbon nanofibers, few-layer graphite fragments, or CNTs–Al2O3 composites has been investigated. All of the Co/support catalytic systems have been characterized by temperature-programmed reduction, transmission electron microscopy, and ...
E. V. Suslova, S. A. Chernyak, A. V. Egorov, S. V. Savilov, V. V. Lunin   +4 more
openaire   +1 more source

Polymerization of isoprene with cobalt catalysts

Polymer Science Series B, 2014
The polymerization of isoprene with catalytic systems efficient for the cis polymerization of butadiene, i.e., cobalt 2-ethyl hexanoate-diethylaluminum chloride and cobalt 2-ethyl hexanoate-ethylaluminum sesquichloride, is studied. The catalysts are obtained via in situ mixing of the components or at a reduced temperature (0–5°C) in the presence of a ...
V. A. Yakovlev, I. F. Gavrilenko, N. N. Glebova, G. N. Bondarenko   +3 more
openaire   +1 more source

Characterization of cobalt-impregnated VPO catalysts

Catalysis Today, 2000
Abstract Cobalt-impregnated VPO catalysts containing 1–6% of the metal by weight were prepared. The catalytic tests showed that cobalt impregnation significantly increased the overall activity while slightly decreasing the maleic anhydride selectivity.
L.M. Cornaglia, C.R. Carrara, J.O. Petunchi, E.A. Lombardo   +3 more
openaire   +1 more source