The mechanism of electroreduction of nitrate ions on a hybrid electrode nanodispersed copper-MK-40 membrane

Chaika, M. Yu.; Bulavina, E. V.; Solyanikova, A. S.; Кравченко, Т. А.; Seredin, P. V.

doi:10.1134/s1023193512020024

Cited by 2 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In comparison with the CaP-ini support, the CaP-IWI-2-DRY sample had two other peaks at and 1350 cm À1 , which are attributed to the N-O bond vibration of nitrate groups. [31,32] On the other hand, the IR spectrum of CaP-IWI-20-DRY was completely different from those of CaP-ini and CaP-IWI-2-DRY. With high content of copper nitrate salts, it was possible that the initial calcium phosphate particles of CaP-ini support were covered by copper nitrate layers.…”

Section: Ftirmentioning

confidence: 87%

Synthesis, characterization, and thermo-mechanical properties of copper-loaded apatitic calcium phosphates

Martı́nez¹,

Minh²,

Weiss-Hortala³

et al. 2013

Composite Interfaces

View full text Add to dashboard Cite

Copper is well known as a classical transition metal used in heterogeneous catalysis. In this study, copper-loaded apatitic calcium phosphates were prepared using incipient wetness impregnation (IWI) and ionic exchange (IE) methods. The interaction between copper precursor (copper nitrate trihydrate, Cu(NO 3) 2 •3H 2 O) and apatitic calcium phosphate (CaP) depended strongly on the preparation method and the content of copper-loaded. Using IE, copper(II) cations (Cu 2+) were incorporated in the apatitic structure of CaP. The content of copper(II) cations seemed to be limited at about 2.2 wt.%. Calcination at 400°C had no influence on the solids obtained by the IE method. Using IWI, the deposition of a theoretical copper content of 2 wt.% led to the incorporation of copper(II) cations in the apatitic structure of CaP by IE with Ca 2+ , despite the low quantity of aqueous solvent used. Therefore the resulting product was similar to that obtained by IE. When the theoretical copper content rose to 20 wt.%, the entire amount of copper precursor molecules were largely deposited, which resulted in the formation of copper oxide particles (CuO) after air calcination at 400°C. Thermo-mechanical analysis study showed that the presence of copper oxide did not modify the thermal shrinkage of the initial calcium phosphate. On the other hand, thermal shrinkage was much more important in the case of CaP substituted with copper(II) cations.

show abstract

Section: Ftirmentioning

confidence: 87%

Synthesis, characterization, and thermo-mechanical properties of copper-loaded apatitic calcium phosphates

Martı́nez¹,

Minh²,

Weiss-Hortala³

et al. 2013

Composite Interfaces

View full text Add to dashboard Cite

show abstract

Hybrid electrode materials based on ion-exchange matrix containing copper nanoparticles and carbon fibers for the electroreduction of nitrate ions

2015

Self Cite

View full text Add to dashboard Cite

Copper-containing composite electrodes have been obtained by the chemical deposition of copper into the film on an electrode composed of an ion-exchange matrix and carbon fibers. The size of copper particles determined by X-ray diffraction analysis amounts to 23-29 nm and is not practically changed with a growth in the copper concentration in the electrode material. The active area of the surface of copper particles is determined electrochemically using the underpotential electrodeposition of lead ions. It is shown that the rate of electrochemical reduction of nitrate ions increases with the concentration of copper particles and reaches its maximum at 90 μg/cm 2 . The electroreduction of nitrate ions proceeds in the mode of mixed kinetics and is an irreversible process.

show abstract

The mechanism of electroreduction of nitrate ions on a hybrid electrode nanodispersed copper-MK-40 membrane

Cited by 2 publications

References 14 publications

Synthesis, characterization, and thermo-mechanical properties of copper-loaded apatitic calcium phosphates

Synthesis, characterization, and thermo-mechanical properties of copper-loaded apatitic calcium phosphates

Hybrid electrode materials based on ion-exchange matrix containing copper nanoparticles and carbon fibers for the electroreduction of nitrate ions

Contact Info

Product

Resources

About