Topic
Cobalt
About: Cobalt is a research topic. Over the lifetime, 69899 publications have been published within this topic receiving 1242058 citations. The topic is also known as: Co & Element 27.
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TL;DR: The findings suggest that in total hip replacements using metal-metal pairings, metal ions of the alloys are released, which may lead to significantly elevated metal concentrations in biological fluids.
Abstract: Objective: To determine metal concentrations in blood and urine of patients who received cobalt-chromium-alloy metal on metal hip implants. Methods: Cobalt and chromium were determined in blood and...
177 citations
TL;DR: In this paper, the authors compared the catalytic properties of iron tetrasulfophthalocyanine and manganese and cobalt in the liquid phase oxidation of 2-methylnaphthalene and 2,3,6-trimethylphenol with hydrogen peroxide and t -butylhydroperoxide.
177 citations
TL;DR: In this paper, an analytical impedance model of the metal hydride electrode was used to calculate the diffusion coefficient of hydrogen in the metal alloy, and the impedance response of cobalt microencapsulated LaNi4.27Sn0.24 electrode was measured at different hydrogen contents.
176 citations
TL;DR: Titania-supported copper oxide catalysts have been prepared with loadings in the range from 1/3 to 5 theoretical layers and have been tested for the combustion of CO and toluene.
176 citations
TL;DR: Benefiting from the distinct structural and compositional merits, the optimized hetero-metal oxyphosphide catalyst exhibits considerable activity for photosensitized CO2 reduction, affording a high CO evolution rate.
Abstract: Materials for high-efficiency photocatalytic CO2 reduction are desirable for solar-to-carbon fuel conversion. Herein, highly dispersed nickel cobalt oxyphosphide nanoparticles (NiCoOP NPs) were confined in multichannel hollow carbon fibers (MHCFs) to construct the NiCoOP-NPs@MHCFs catalysts for efficient CO2 photoreduction. The synthesis involves electrospinning, phosphidation, and carbonization steps and permits facile tuning of chemical composition. In the catalyst, the mixed metal oxyphosphide NPs with ultrasmall size and high dispersion offer abundant catalytically active sites for redox reactions. At the same time, the multichannel hollow carbon matrix with high conductivity and open ends will effectively promote mass/charge transfer, improve CO2 adsorption, and prevent the metal oxyphosphide NPs from aggregation. The optimized hetero-metal oxyphosphide catalyst exhibits considerable activity for photosensitized CO2 reduction, affording a high CO evolution rate of 16.6 μmol h-1 (per 0.1 mg of catalyst).
176 citations