Selective conversion of glycerol to hydroxyacetone in gas phase over La2CuO4 catalyst

Velasquez, Mauricio; Santamarı́a, Alexander; Batiot‐Dupeyrat, Catherine

doi:10.1016/j.apcatb.2014.06.006

Cited by 68 publications

(45 citation statements)

References 27 publications

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“…4, the contact angle of PEDOT:PSS film is 21.0 • C, which is far lower than that of ITO glass and CuO X film. According to the published results of Kilwon Cho [36], appropriately increase the hydrophobicity of the buffer layer will increase the PCE performance of the PSCs. Hence, the relatively high contact angle of CuO X film demonstrates a better hydrophobic property, which promises a better contact surface with the hydrophobic active layer and a better photovoltaic performance [8,39].…”

Section: Structure Characterization Of the Cuo X Filmmentioning

confidence: 95%

“…We can see that there are three main characteristic peaks of Cu, O, and C. In the core level XPS region of Cu 2p3/2 (shown in Fig. 2b) [35,36], the peak of Cu 2p3/2 can split to two peaks which are the binding energy peaks of Cu + and Cu 2+ . And the binding energy peaks of Cu + and Cu 2+ are 932.6 and 934.0 eV [37], which are in accordance with the experiment results of Miquel Salmeron [38].…”

Section: Structure Characterization Of the Cuo X Filmmentioning

confidence: 95%

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Simple solution-processed CuOX as anode buffer layer for efficient organic solar cells

Shen

Yang

Bao

et al. 2015

Materials Science and Engineering: B

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Section: Structure Characterization Of the Cuo X Filmmentioning

confidence: 95%

Section: Structure Characterization Of the Cuo X Filmmentioning

confidence: 95%

Simple solution-processed CuOX as anode buffer layer for efficient organic solar cells

Shen

Yang

Bao

et al. 2015

Materials Science and Engineering: B

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“…Its formation can be understood as arising from the reaction of hydroxyacetone with aniline (Scheme 3). 54 Hydroxyacetone has previously been reported 55 The effect of increasing the ratio of 2a:1b from 1:1 to 1:3 is shown in Figure 2 and Table 3. As expected,…”

mentioning

confidence: 98%

Continuous niobium phosphate catalysed Skraup reaction for quinoline synthesis from solketal

et al. 2017

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Solketal is derived from the reaction of acetone with glycerol, a by-product product of the biodiesel industry. We report here the continuous reaction of solketal with anilines over a solid acid niobium phosphate (NbP), for the continuous generation of quinolines in the the well-established Skraup reaction. This study shows that NbP can catalyse all stages of this multistep reaction at 250 °C and 10 MPa pressure, with a selectivity for quinoline of up to 60%. We found that the catalyst eventually deactivates, most probably via a combination of coking and reduction processes but neverthless we show the promise of this approach. We demonstarted here the application of our approach to synthesize both mono-and bis-quinolines from the commodity chemical, 4,4'-methylenedianiline.

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“…[33][34][35] It was already mentioned that the presence of Cu 0 /Cu I and the synergetic effect of Cu 0 and Cu + may favor the conversion of glycerol to acetol and 1,2-propanediol under specific reaction conditions. [36][37][38][39][40][41] Xiao et al 33 proposed that the metal copper was mainly responsible for the activation of hydrogen, while Cu + was for dehydration due to the presence of Lewis acid sites. The dehydration also takes place at metallic copper site, since glycerol may also be dehydrated to acetol.…”

Section: Temperature Programmed Reduction (Tpr)mentioning

confidence: 99%

Gas-Phase Conversion of Glycerol to Acetol: Influence of Support Acidity on the Catalytic Stability and Copper Surface Properties on the Activity

Braga¹,

Essayem²,

Prakash³

et al. 2016

Journal of the Brazilian Chemical Society

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Mesoporous mixed copper-aluminum oxides and copper-silicon oxides were synthesized with polymeric precursors route in order to evaluate the effect of the support acidity on the catalytic stability due to the carbon deposit and the copper surface characteristics on the catalytic activity for the gas-phase conversion of glycerol to acetol. The samples were characterized by different techniques such as inductively coupled plasma (ICP), thermogravimetry and differential thermal analyses (TGA-DTA), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N2 adsorption/desorption isotherms, temperature-programmed reduction with H 2 (H 2 -TPR) and microcalorimetry of NH 3 adsorption. The metallic copper surface was shown by XPS, which was observed an increase with the copper loading without marked changes between Si or Al support using the same copper content. The Cu-Al catalysts present acidic properties close to that of the pure alumina support while the Cu-Si solid is not acid, as expected. Reduced catalysts were evaluated in the reaction of glycerol conversion. The catalytic results showed a clear dependence of the glycerol conversion to acetol with the Cu metal surface and the initial catalytic properties did not depend on the support acidity, since the copper is the major active site. It was observed 95% of acetol selectivity and 80% of glycerol conversion for the best catalyst. However, the support acidity influenced the catalyst stability, since Cu-Al solid deactivated continuously by contrast to Cu-Si sample, which reached stability after 2 h of reaction. The higher acidity for the Al support leads to a greater carbon deposit compared to Si support, blocking the active sites and providing a rapid catalytic deactivation.

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Selective conversion of glycerol to hydroxyacetone in gas phase over La2CuO4 catalyst

Cited by 68 publications

References 27 publications

Simple solution-processed CuOX as anode buffer layer for efficient organic solar cells

Simple solution-processed CuOX as anode buffer layer for efficient organic solar cells

Continuous niobium phosphate catalysed Skraup reaction for quinoline synthesis from solketal

Gas-Phase Conversion of Glycerol to Acetol: Influence of Support Acidity on the Catalytic Stability and Copper Surface Properties on the Activity

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