The Use of Infrared Spectroscopic Methods in the Field of Heterogeneous Catalysis by Metal Oxides

Busca, Guido

doi:10.1002/9783527626113.ch3

Cited by 12 publications

(7 citation statements)

References 161 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5) shows well evident bands at 791, 698 and 488 cm À1 . The typical doublet at 791 and 698 cm À1 is due to the vibrations of "isolated" MO 4 tetrahedra [20,21]. This material is actually a largely amorphous structure with some kind of intergrowth between the wurtzite and the spinel phase.…”

Section: 79mentioning

confidence: 98%

Steam reforming of methanol over x % Cu/Zn–Al 400 500 based catalysts for production of hydrogen: Preparation by adopting memory effect of hydrotalcite and behavior evaluation

Hammoud

Gennequin

Aboukaı̈s

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Section: 79mentioning

confidence: 98%

Steam reforming of methanol over x % Cu/Zn–Al 400 500 based catalysts for production of hydrogen: Preparation by adopting memory effect of hydrotalcite and behavior evaluation

Hammoud

Gennequin

Aboukaı̈s

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…In the FT-IR spectrum of sample G-823, new vibration frequencies arise, typical for cubic Mn 2 O 3 [43,51,52] and related to the significant increase in its content in the obtained product. Absorption bands at 568 b 652 cm -1 are attributed to the Mn-O stretching vibration, and a shoulder at 520 cm -1 is assigned to Mn-O bending vibration of Mn 2 O 3 .…”

Section: Resultsmentioning

confidence: 97%

Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions

Donkova

Avdeev

2015

J Therm Anal Calorim

View full text Add to dashboard Cite

The thermolysis of the ill-known c-MnC 2 O 4 Á 2H 2 O is investigated applying DTA, TG, DSC, FT-IR, SEM, BET and Rietveld XRD phase analyses for thorough characterization of the starting compound and its calcined products. The dehydration proceeds in one step with DH = 149 kJ mol -1 (reported for the first time). Primary decomposition product is Mn 3 O 4 ([Mn 2? Mn 2 3? ]O 4 ) with high specific surface area. During its formation, the oxidation of Mn 3? species to Mn 4? starts, followed by oxidation of Mn 2? -Mn 3? , thus leading to formation of metastable Mn 5 O 8 ([Mn 2 2? Mn 3 4? ]O 8 ) and Mn 2 O 3 . Before complete precursor decomposition under non-isothermal conditions, the reduction of Mn 4? -Mn 3? occurs, forming an additional amount of Mn 3 O 4 . After isothermal annealing of c-MnC 2 O 4 Á2H 2 O in the range of 573-823 K, Mn 3 O 4 is detected as a major product in all samples. Mn 5 O 8 is identified after calcination at 573, 673, 723 K, and its amount decreases gradually in this order. Cubic Mn 2 O 3 appears after heat treatment at 673 K; its content varies between 13 and 23 % in the range of 673-773 K and becomes close to that of Mn 3 O 4 at 823 K. The application of the same experimental conditions as in the investigation of a-MnC 2 O 4 Á2H 2 O and MnC 2 O 4 Á3H 2 O allows an objective comparison of the nature and the peculiarities of the thermal decomposition of different crystal forms of manganese oxalate.

show abstract

“…from their MeO multiple bond stretchings. 15 The presence at the surface of covalent oxide species vanadates, molybdates, wolframates, chromates, perrhenates is also detected efficiently by Raman spectroscopy, 37,38 because of their strong Raman scattering effect. UVevis spectroscopy can also give information on the location at the surface of metal cations.…”

Section: Direct Surface Analysis By Conventional Spectroscopiesmentioning

confidence: 98%

“…Vibrational spectroscopies (in particular Infrared (IR) spectroscopy 15 and Raman spectroscopy 16 ) allow to have information on the structure of both amorphous and crystalline catalytic materials.…”

Section: Vibrational Spectroscopiesmentioning

confidence: 99%

Characterization of Real Catalytic Materials

Busca¹

2014

Heterogeneous Catalytic Materials

Self Cite

View full text Add to dashboard Cite

The Use of Infrared Spectroscopic Methods in the Field of Heterogeneous Catalysis by Metal Oxides

Cited by 12 publications

References 161 publications

Steam reforming of methanol over x % Cu/Zn–Al 400 500 based catalysts for production of hydrogen: Preparation by adopting memory effect of hydrotalcite and behavior evaluation

Steam reforming of methanol over x % Cu/Zn–Al 400 500 based catalysts for production of hydrogen: Preparation by adopting memory effect of hydrotalcite and behavior evaluation

Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions

Characterization of Real Catalytic Materials

Contact Info

Product

Resources

About