CVD synthesis and catalytic combustion application of chromium oxide films

Abstract

Chromiumoxide (Cr2O3) thin films were controllably synthesized by pulsed‐spray evaporation chemical vapor deposition (PSE‐CVD) for deep oxidation of propene. The effect of substrate temperature on the growth kinetics and morphology of the films was investigated. The prepared samples were comprehensively characterized with respect to structure, morphology and surface composition with XRD, SEM and XPS, respectively. An in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was involved to reveal the surface mechanism occurred on Cr2O3. The growth rate exhibited a linear behavior when the temperature increase from 300 to 450 °C. The structural analysis indicated that a pure phase of Cr2O3 was obtained at 425 °C. The catalytic tests showed that Cr2O3 films prepared on flexible substrates exhibited advantages for the catalytic oxidation of C3H6. Based on the DRIFTS observations, the Langmuir‐Hinshelwood (L‐H) mechanism was proposed for C3H6 over Cr2O3 films. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

CVD‐Made Spinels: Synthesis, Characterization and Applications for Clean Energy

“…Therefore, numerous investigations on the development of TMOs catalysts are mainly focused on this type of oxides. Several n-type and p-type single oxides such as Co 3 [46] have been prepared via PSE-CVD and successfully tested as active catalysts toward total oxidation of some real fuels such as CO, C 2 H 2 , C 3 H 6 , n-C 4 H 8 and C 2 H 6 O as representatives of industrial exhaust stream or VOCs. Among these oxides mentioned above, a few of them seem to be particularly promising.…”

“…In addition to its good thermal stability, Cr 2 O 3 exhibited attractive performance in the low-temperature abatement of VOCs. Recently, Liang et al [46] reported the synthesis of Cr 2 O 3 by PSE-CVD for the total oxidation of propene. (Figure 8b) were formed in the reaction without catalyst, which could originate from the partial oxidation reaction.…”

“…The reaction was carried at the total flow rate was kept at 15 ml min -1 with 1% of fuel and 10% O 2 diluted in Ar, corresponding the WHSV of 62,500 g cat -1 h -1 . Reproduced with permission from[46]. Copyright 2015, Wiley-VCH.…”

“…In-situ DRIFTS spectra of Cr 2 O 3 during C 3 H 6 adsorption at different temperatures. Reproduced with permission from[46]. Copyright 2015, Wiley-VCH.…”