The effect of the Cr and Mo on the surface accumulation of copper in the electrodeposited Ni–Fe/Cu alloy films

Ranjbar, M.; Ahadian, Mohammad Mahdi; zad, Azam Iraji; Dolati, Abolghasem

doi:10.1016/j.mseb.2005.09.007

Cited by 11 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the Cr and Mo reduce the Cu segregation as we reported elsewhere [45]. In fact, Cr and Mo are effective materials for protecting of the surface oxidation [17,46] and so Cu segregation decreases [13].…”

Section: Resultssupporting

confidence: 55%

Diffusion and segregation of substrate copper in electrodeposited Ni–Fe thin films

Ahadian

zad

Nouri

et al. 2007

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 55%

Diffusion and segregation of substrate copper in electrodeposited Ni–Fe thin films

Ahadian

zad

Nouri

et al. 2007

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…The reduction in the specific surface area of both the catalysts based on Y zeolite suggests the micropores of the zeolite Y are significantly blocked. However, the external surface area and pore size are slightly increased, which may be due to the accumulation hole formed by the agglomerated Cu species on the outer surface of the catalysts 42 …”

Section: Resultsmentioning

confidence: 99%

Highly dispersed Cu supported on mesoporous Al‐KIT‐6 for oxidative carbonylation of methanol to dimethyl carbonate

Yan

Zhao

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

Microporous NaY zeolite is a common support of Cu catalysts for oxidative carbonylation of methanol, but the dispersion of Cu species on NaY is usually subjected to its micropore size. Here, ordered mesoporous KIT‐6 was employed as the support for Cu catalyst and Al was incorporated into its framework to increase the surface acidity, which eventually improves the surface exchange capacity and Cu dispersion. The evolution of the state of Cu species on KIT‐6 was analyzed combined with control of Cu loading. The physicochemical properties of the supports and corresponding catalysts were characterized by N2 adsorption–desorption, X‐ray diffraction, ammonia temperature programmed desorption, Fourier transform infrared spectra, transmission electron microscopy, hydrogen temperature programmed reduction, and X‐ray photoelectron spectroscopy. It was found that mesoporous KIT‐6 showed better Cu dispersion than microporous NaY zeolite. Agglomerated CuO, dispersed CuO, and Cu2+ are the major Cu species observed on the catalyst surface. The increased surface acidic sites of KIT‐6 by Al incorporation promoted the formation of Cu2+ and dispersion of CuO. With the increase in Cu loading, the Cu2+ content in the catalyst was decreased gradually along with increase in the bulk CuO. It was speculated that some exchanged Cu2+ could be transformed into highly dispersed CuO and even bulk CuO after calcination at a high Cu loading. Combined with the catalyst evaluation results, it was deduced that highly dispersed Cu2+ and CuO particles play significant roles in catalytic activity. The catalyst Cu/Al‐K‐10 achieved the highest space time yield of dimethyl carbonate of 135.4 mg/(g·h), which is 2.7 times the Cu/K‐10 owing to its more dispersed Cu species. This laid the basis for preparing highly dispersed Cu species on mesoporous silica supports.

show abstract

Composition depth profile analysis of electrodeposited alloys and metal multilayers: the reverse approach

Neuróhr

Csík

Vad

et al. 2011

J Solid State Electrochem

View full text Add to dashboard Cite

The effect of the Cr and Mo on the surface accumulation of copper in the electrodeposited Ni–Fe/Cu alloy films

Cited by 11 publications

References 26 publications

Diffusion and segregation of substrate copper in electrodeposited Ni–Fe thin films

Diffusion and segregation of substrate copper in electrodeposited Ni–Fe thin films

Highly dispersed Cu supported on mesoporous Al‐KIT‐6 for oxidative carbonylation of methanol to dimethyl carbonate

Composition depth profile analysis of electrodeposited alloys and metal multilayers: the reverse approach

Contact Info

Product

Resources

About