Preparation and characterization of CuZnAl catalysts by citrate gel process

Barroso, Mariana N.; Gómez, Manuel F.; Gamboa, Julio Andrade; Arrúa, Luis A.; Abello, M. Cristina

doi:10.1016/j.jpcs.2006.01.114

Cited by 43 publications

(26 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, after this step copper ferrite formation can be assured. This assignment is also supported by the similar results already reported for the related materials obtained from citrate precursor route [6,19,20].…”

Section: Tga/dta Of Catalysts Prepared By Citrate Routesupporting

confidence: 89%

Preparation and characterization of CuFe2O4 bulk catalysts

Tasca

Quincoces

Lavat

et al. 2011

Ceramics International

View full text Add to dashboard Cite

Section: Tga/dta Of Catalysts Prepared By Citrate Routesupporting

confidence: 89%

Preparation and characterization of CuFe2O4 bulk catalysts

Tasca

Quincoces

Lavat

et al. 2011

Ceramics International

View full text Add to dashboard Cite

“…On fresh sample, figure 1a, the diffraction lines of the ZnAl 2 O 4 spinel phase (2h = 36.9°, 31.3°, 59.4°a nd 65.3°, JCPDS-5-669) are intense and symmetric indicating a high crystallinity. The intensity ratio I 311 / I 220 being I 311 and I 220 reflection line intensities of basal planes 311 and 220 is strongly indicating that the ZnAl 2 O 4 is a normal spinel [24]. For reduced and used samples, figure 1(b) and (c), the peaks are not practically altered which is an indication of a high structural stability.…”

Section: Resultsmentioning

confidence: 89%

Reactivity of Aluminum Spinels in the Ethanol Steam Reforming Reaction

et al. 2006

View full text Add to dashboard Cite

Aluminum spinels, MAl 2 O 4 with M 2+ = Cu, Zn or Ni, were prepared by citrate method and its reactivity in the ethanol steam reforming reaction was studied at 500°C. They were characterized by TG, BET surface area, XRD, FTIR and TPR techniques. The catalytic behavior depended strongly on the nature of divalent metal which determines the physico-chemical properties of samples. In all cases, very active catalysts with a complete ethanol conversion were reached. Hydrogen yield follows the order of ZnAl > NiAl > CuAl.

show abstract

“…All the samples also show bands between 1,400 and 1,600 cm -1 , the first one associated to the vibrations Al-OH, characteristics of the ZnAl 2 O 4 , and the second one to the HOH due to the water [7]. The bands around 900-400 cm -1 would be related to the inorganic network [31].…”

Section: Synthesis and Characterization Of Znal 2 O 4 Supportsmentioning

confidence: 99%

Characterization of ZnAl2O4 Obtained by Different Methods and Used as Catalytic Support of Pt

et al. 2009

View full text Add to dashboard Cite

In this work the synthesis of a ZnAl 2 O 4 spinel to be used as a support of metals and its characterization were studied. The methods used for the ZnAl 2 O 4 preparation were: ceramic method (CM), mechanochemical synthesis in humid medium (HMS) and coprecipitation (COPR). ZnAl 2 O 4 CM and ZnAl 2 O 4 HMS showed negligible acidity, but the ZnAl 2 O 4 COPR displayed a low acidity. The spinels obtained by COPR and HMS showed higher specific surface area and pore volumes than that prepared by the ceramic method. In addition the catalytic performance of Pt supported on the prepared spinel was evaluated in the n-butane dehydrogenation reaction. The Pt catalysts prepared with ZnAl 2 O 4 COPR presented better activity and selectivity to olefins than the ones prepared with ZnAl 2 O 4 HMS and ZnAl 2 O 4 CM, which could be correlated with a higher metallic dispersion and lower particle sizes, detected by TEM. The acidity of ZnAl 2 O 4 COPR, observed by isopropanol dehydration and TPD of pyridine, and the sequence of specific surface areas of the different spinels (ZnAl 2 O 4 COPR [ ZnAl 2 O 4 HMS [ ZnAl 2 O 4 CM) are other important factors to define the final dispersion of the catalysts.

show abstract

Preparation and characterization of CuZnAl catalysts by citrate gel process

Cited by 43 publications

References 30 publications

Preparation and characterization of CuFe2O4 bulk catalysts

Preparation and characterization of CuFe2O4 bulk catalysts

Reactivity of Aluminum Spinels in the Ethanol Steam Reforming Reaction

Characterization of ZnAl2O4 Obtained by Different Methods and Used as Catalytic Support of Pt

Contact Info

Product

Resources

About