Methanol carbonylation catalyzed by TiO2–supported gold: An in-situ infrared spectroscopic investigation

Martinez-Ramirez, Z.; Flores-Escamilla, Gerardo A.; Berumen-España, Gerardo; Jimenez‐Lam, Sergio A.; Handy, Brent E.; Cárdenas‐Galindo, María‐Guadalupe; Sarmiento-Lopez, Adan G.; Fierro-Gonzalez, Juan C.

doi:10.1016/j.apcata.2015.06.020

Cited by 16 publications

(4 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, Fierro-Gonzalez observed CH3I was also indispensable to the gold-acetyl species generation, which are attacked by neighboring methoxy species to give the carbonylation products. [19] Furthermore, carbonylation of methanol to acetaldehyde over Au clusters on single-layer MoS2 films was also reported by Blair and co-workers (Scheme 3). [20] A partial of CO and methanol was transformed to acetaldehyde ( 14) under mild conditions (3.08 MPa and 120 o C).…”

Section: Accepted Manuscriptsupporting

confidence: 59%

See 1 more Smart Citation

Synthesis of Carbonyl Compounds by Gold-Catalyzed Carbonylation Reactions

Cao

Lin

2022

Synlett

View full text Add to dashboard Cite

In recent years, carbonylation reactions has experienced rapid progress and has become the essential and efficient strategies for the large-scale preparation of carbonyl compounds. Although palladium, rhodium, iridium, ruthenium and cobalt are the dominating catalysis in carbonylation reactions, the gold has emerged as a selectable catalysis in some specific carbonylation reactions in the past two decades. Both homogeneous and heterogeneous gold catalysis have been studied in carbonylation reactions. Herein, we briefly reviewed the history of gold catalyzed carbonylation reactions, including carbonylation of olefins, methanol and amines. It also highlights our recent works on synergistic Au/Cu-catalyzed oxidative carbonylation of amines. 1 Introduction 2 Carbonylation of olefins 3 Carbonylation of methanol 4 Carbonylation of amines 4.1 Gold catalysis 4.2 Bimetallic Au-M catalysis 5 Conclusion and Outlook

show abstract

Section: Accepted Manuscriptsupporting

confidence: 59%

“…Then, Fierro-Gonzalez observed CH 3 I was also indispensable to the gold–acetyl species generation, which are attacked by neighboring the methoxy species to give the carbonylation products. 19…”

Section: Carbonylation Of Methanolmentioning

confidence: 99%

Synthesis of Carbonyl Compounds by Gold-Catalyzed Carbonylation Reactions

Cao

Lin

2022

Synlett

View full text Add to dashboard Cite

show abstract

“…This reaction is usually homogenously catalyzed using a square-planar nucleophilic Rh(I) anion. [34] To transfer this process to a heterogeneously catalyzed reaction, supported Rh [35][36][37] , Ir [38][39][40] , Au [41,42] or Ni carbonyl complexes [43][44][45] were investigated in the past due to their similarity to the in-depth analyzed homogenous systems. One of the most efficient ways to improve the carbonylation activity of the different complexes has been the enrichment of electron density of the applied transition metal.…”

Section: Introductionmentioning

confidence: 99%

Application of Prussian Blue Analogue‐Derived Mn−Co Catalysts in the Hydrogenation of CO to Higher Alcohols

et al. 2023

View full text Add to dashboard Cite

MnxCo3‐x[Co(CN)6]2 Prussian blue analogues were synthesized with Mn : Co ratios in the range from 7 : 10 to 1 : 11 and pyrolyzed at 600 °C to obtain a highly nitrogen‐ and oxygen‐functionalized carbon matrix with embedded reduced Mn and Co species. These catalyst precursors were applied in the CO hydrogenation to higher alcohols at 260 °C and a pressure of 60 bar using a H2/CO ratio of 1. Metallic Co0 formed during pyrolysis was partially transformed into Co2C under reaction conditions. With increasing Co content CO conversion increased up to 10.6 % reaching a total alcohol selectivity of 19 %. Gas chromatograms revealed the expected formation of primary short‐chain alcohols, but also of secondary alcohols, acetic acid and propionaldehyde indicating olefin hydration, carbonylation and hydroformylation as reaction pathways, respectively. The obtained hydrocarbon fractions had a very high olefinicity, which is beneficial for both olefin hydration to secondary alcohols catalyzed by adsorbed carboxylic acids and for hydroformylation. Whereas the carbide‐based reaction pathway and the reductive hydroformylation are assumed to occur at the Co2C/Co0 interface, carbonylation is presumably catalyzed by an additional Co‐based active site. Thus, a unique class of multifunctional catalysts was obtained with highly promising properties bridging the gap between heterogeneous and homogeneous catalysis.

show abstract

“…By contrast, Calzada et al, studying gold samples prepared by deposition-precipitation method at low loading, like in our case, reported differences comparing the metal containing sample and the bare support [41], revealing the critical influence of gold present during methanol adsorption. So, according to K. Kähler at al., the band at 1271 cm −1 , associated with the band at 1448 cm −1 , was attributed to a carbonate formed on Au metal nanoparticles [42]. A less polar and hydrophilic alcohol, such as ethanol, was used for a comparison with methanol DRIFT spectra.…”

Section: Drifts Of Adsorbed Methanol and Ethanolmentioning

confidence: 99%

Surface Probing by Spectroscopy on Titania-Supported Gold Nanoparticles for a Photoreductive Application

et al. 2018

View full text Add to dashboard Cite

The continuous increase in scientific reports concerning photocatalysis and in particular CO2 photoreduction in recent years reveals the high degree of interest around the topic. However, the adsorption and activation mechanisms of CO2 on TiO2, the most used photocatalyst, are poorly understood and investigated. Gold nanoparticles were prepared by a modified deposition-precipitation method using urea and a chemical reductant. Bare P25 was used as reference. Combined spectroscopic investigations of fresh and spent samples with photoactivity studies reported in this article provide new insights to the role of CO2 adsorption and carbonate formation on Au/TiO2 during CO2 photocatalytic reduction. The key intermediates’ and products’ adsorption (CO, methanol, ethanol) was studied, coupled with X-ray photoelectron microscopy (XPS) and UV-Visible spectroscopy. The adsorption of CO2 on fresh and spent catalysts changes radically considering the carbonate formation and the gold surface presence. Methanol and ethanol revealed new adsorbed species on Au with respect to bare titania. The characterisation of the spent catalysts revealed the good stability of these samples.

show abstract

Methanol carbonylation catalyzed by TiO2–supported gold: An in-situ infrared spectroscopic investigation

Cited by 16 publications

References 65 publications

Synthesis of Carbonyl Compounds by Gold-Catalyzed Carbonylation Reactions

Synthesis of Carbonyl Compounds by Gold-Catalyzed Carbonylation Reactions

Application of Prussian Blue Analogue‐Derived Mn−Co Catalysts in the Hydrogenation of CO to Higher Alcohols

Surface Probing by Spectroscopy on Titania-Supported Gold Nanoparticles for a Photoreductive Application

Contact Info

Product

Resources

About