Co/SiO2 Catalyst for Methoxycarbonylation of Acetylene: On Catalytic Performance and Active Species DOI Creative Commons
An Wang,

Hongchen Cao,

Leilei Zhang

и другие.

Molecules, Год журнала: 2024, Номер 29(9), С. 1987 - 1987

Опубликована: Апрель 26, 2024

Reppe carbonylation of acetylene is an atom-economic and non-petroleum approach to synthesize acrylic acid acrylate esters, which are key intermediates in the textile, leather finishing, polymer industries. In present work, a noble metal-free Co@SiO2 catalyst was prepared evaluated methoxycarbonylation reaction acetylene. It discovered that pretreatment by different reductants (i.e., C2H2, CO, H2, syngas) greatly improved catalytic activity, Co/SiO2-H2 demonstrated best performance under conditions 160 °C, 0.05 MPa 4 1 h, affording production rate 4.38 gMA+MP gcat−1 h−1 for methyl (MA) propionate (MP) 0.91 gDMS dimethyl succinate (DMS), respectively. Transmission electron microscopy (TEM), X-ray diffraction (XRD), diffuse reflectance infrared Fourier transform spectra CO adsorption (CO-DRIFTS) measurements revealed H2 reduction decreased size Co nanoparticles promoted formation hollow architectures, leading increase metal surface area on catalyst. The hot filtration experiment confirmed Co2(CO)8 generated situ during or at pre-activation stage, served as genuine active species. Our work provides facile convenient synthetization reaction.

Язык: Английский

Suppressing Metal Leaching and Sintering in Hydroformylation Reaction by Modulating the Coordination of Rh Single Atoms with Reactants DOI
Zhounan Yu,

Shengxin Zhang,

Leilei Zhang

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(17), С. 11955 - 11967

Опубликована: Апрель 19, 2024

Hydroformylation reaction is one of the largest homogeneously catalyzed industrial processes yet suffers from difficulty and high cost in catalyst separation recovery. Heterogeneous single-atom catalysts (SACs), on other hand, have emerged as a promising alternative due to their initial activity reasonable regioselectivity. Nevertheless, stability SACs against metal aggregation leaching during has rarely been addressed. Herein, we elucidate mechanism Rh by investigating structural evolution

Язык: Английский

Процитировано

30
Recycling Cobalt in Spent Lithium-Ion Batteries to Design Two-Dimensional Porous CoOx/CoNx Nanosheets for Full Water Splitting and Nonenzymatic Glucose Detection DOI
Zhuang Wang, Mian Li, Wenping Cao

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 26, 2024

Язык: Английский

Процитировано

3
Co/SiO2 Catalyst for Methoxycarbonylation of Acetylene: On Catalytic Performance and Active Species DOI Creative Commons
An Wang,

Hongchen Cao,

Leilei Zhang

и другие.

Molecules, Год журнала: 2024, Номер 29(9), С. 1987 - 1987

Опубликована: Апрель 26, 2024

Reppe carbonylation of acetylene is an atom-economic and non-petroleum approach to synthesize acrylic acid acrylate esters, which are key intermediates in the textile, leather finishing, polymer industries. In present work, a noble metal-free Co@SiO2 catalyst was prepared evaluated methoxycarbonylation reaction acetylene. It discovered that pretreatment by different reductants (i.e., C2H2, CO, H2, syngas) greatly improved catalytic activity, Co/SiO2-H2 demonstrated best performance under conditions 160 °C, 0.05 MPa 4 1 h, affording production rate 4.38 gMA+MP gcat−1 h−1 for methyl (MA) propionate (MP) 0.91 gDMS dimethyl succinate (DMS), respectively. Transmission electron microscopy (TEM), X-ray diffraction (XRD), diffuse reflectance infrared Fourier transform spectra CO adsorption (CO-DRIFTS) measurements revealed H2 reduction decreased size Co nanoparticles promoted formation hollow architectures, leading increase metal surface area on catalyst. The hot filtration experiment confirmed Co2(CO)8 generated situ during or at pre-activation stage, served as genuine active species. Our work provides facile convenient synthetization reaction.

Язык: Английский

Процитировано

2