The oxidation state of Cu in HgBa2Can-1CunO2n+2+delta (n = 1-5) phases has been analyzed in terms of the bond valence sums. The totally mobile hole concentration (n(H,t)) of type-I CuO2 planes at the optimal level increases with the increasing number of CuO2 layers (it) per ...
A statistical model accounting for the oxidation state of copper is proposed.doi:10.1016/S0167-2991(08)64770-9A. CiminoM. Lo jaconoStudies in surface science and catalysisLo Jacono M,Cimino A,Inversi M.Oxidation states of copper on alumina studied by redox cycles. Journal of Catalysis . 1982...
Using X-ray absorption spectroscopy (XAS) at the Cu L(2,3) and Co L(2,3) edges, we demonstrate that the valence state of copper in the thiospinel carrollite (CuCo(2)S(4)) is Cu(+) with a d count of Cu d(9.8). The Co has a d count of d(6.4), so that the highly cova...
Variations in the oxidation state of copper during CO catalytic oxidation over powdered CuO and Cu 2 O in a gas mixture of 5% CO/He and air (O 2 ) were investigated by means of an appropriate combination of evolved gas analysis, thermogravimetry, XRD, and FT-IR in the temperature range ...
"Oxidation" and "Oxidization" essentially refer to the same chemical process, where a substance loses electrons or increases its oxidation state, often involving oxygen. The "oxidation" being more commonly used.
Copper nanoparticles (CuNPs) are attractive as a low-cost alternative to their gold and silver analogues for numerous applications, although their potential has hardly been explored due to their higher susceptibility to oxidation in air. Here we show the
Bis(í-oxo)dicopper in Cu-ZSM-5 and Its Role in the Decomposition of NO: A Combined in Situ XAFS, UV-Vis-Near-IR, and Kinetic Study In situ XAFS combined with UV-vis-near-IR spectroscopy are used to identify the active site in copper-loaded ZSM-5 responsible for the catalytic de...
Effect of PDS coating on structural and surface properties Cu(II)Y was prepared by ion exchange of the zeolite NaY with copper(II) nitrate and reduced to Cu(I)Y selectively via vapor-induced reduction (VIR) in term of our previous reports37,38. To tailor the microenvironment of Cu(I)Y,...
(StateKeyLaboratoryofGansuAdvancedNon—FerrousMeta1Materials, LanzhouUniversityofTechnology,Lanzhou730050,China) Abstract:Oxidationrateofcopperwasstudiedbyscanningelectron-microscopy(SEM),X—raydiffraction(XRD)andoxidationweightgain experiment,andtheeffectsofdifferentstructure,grainsizeofcopperandtemperatureonoxidationrat...
Cu2O nanocubes with surfaces comprising mixed oxidation-state copper Cu(0,I,II) sites, oxygen vacancies [O] and hydroxyl OH groups were synthesized. These surfaces enable heterolysis of H2and adsorption of CO2under mild conditions; they facilitate the reverse water–gas shift reaction, while render...