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Effect of glow discharge plasma on rhodium-based catalyst for oxygenates synthesis

HUANG Lihong, CHU Wei, XU Junqiang, HONG Jingping, YI Min

《化学科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 16-19 doi: 10.1007/s11705-007-0004-x

摘要： Rhodium-based catalysts were prepared by impregnation, treated with glow discharge plasma, characterized by X-ray diffraction, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction, H2 temperature-programmed desorption and CO temperature-programmed desorption, and investigated for oxygenate synthesis from CO hydrogenation. Based on the characterization results, plasma treatment endowed the samples with smaller particle size, higher dispersion of active components, and an enrichment of active components on the surface as well. As a result, the reducibility and adsorption properties were modified. In catalytic tests, the catalytic activity for CO hydrogenation over the samples treated by plasma was improved remarkably: the conversion of CO and the yield of oxygenates increased at most by a factor of 78.62% and 51.96%, respectively, while the selectivity of ethanol and methanol in the oxygenates was enhanced as well.
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A mini review on strategies for heterogenization of rhodium-based hydroformylation catalysts

Cunyao Li, Wenlong Wang, Li Yan, Yunjie Ding

《化学科学与工程前沿（英文）》 2018年 第12卷 第1期   页码 113-123 doi: 10.1007/s11705-017-1672-9

摘要： Hydroformylation has been widely used in industry to manufacture high value-added aldehydes and alcohols, and is considered as the largest homogenously catalyzed process in industry. However, this process often suffers from complicated operation and the difficulty in catalyst recycling. It is highly desirable to develop a heterogeneous catalyst that enables the catalyst recovery without sacrificing the activity and selectivity. There are two strategies to afford such a catalyst for the hydrofromylation: immobilized catalysts on solid support and porous organic ligand (POL)-supported catalysts. In the latter, high concentration of phosphine ligands in the catalyst framework is favorable for the high dispersion of rhodium species and the formation of Rh-P multiple bonds, which endow the catalysts with high activity and stability respectively. Besides, the high linear regioselectivity could be achieved through the copolymerization of vinyl functionalized bidentate ligand (vinyl biphephos) and monodentate ligand (3vPPh ) into the catalyst framework. The newly-emerging POL-supported catalysts have great perspectives in the industrial hydroformylation.

关键词： hydroformylation     porous organic ligand (POL)-supported catalysts     heterogeneous catalysis     high stability     immobilization catalysts    

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Catalytic reduction of water pollutants: knowledge gaps, lessons learned, and new opportunities

《环境科学与工程前沿（英文）》 2023年 第17卷 第2期 doi: 10.1007/s11783-023-1626-z

摘要：

● Advances, challenges, and opportunities for catalytic water pollutant reduction.

关键词： Molybdenum     Rhenium     Rhodium     Ruthenium     Catalyst Support     Bromate    

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Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling of benzoic acids using sodium chlorite as oxidant

Yun Liu, Youquan Zhu, Chaojun Li

《化学科学与工程前沿（英文）》 2018年 第12卷 第1期   页码 3-8 doi: 10.1007/s11705-017-1693-4

摘要： A mild and efficient synthesis for the biaryl acids via rhodium-catalyzed cross-dehydrogenative coupling reaction has been developed. This novel protocol with sodium chlorite as an oxidant featured many advantages such as mild reaction conditions, high regioselectivity, tolerance of various functional groups, and good to excellent yields.

关键词： biaryl acids     cross-dehydrogenative coupling     rhodium-catalyzed    

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标题 作者 时间 类型 操作

Effect of glow discharge plasma on rhodium-based catalyst for oxygenates synthesis

HUANG Lihong, CHU Wei, XU Junqiang, HONG Jingping, YI Min

期刊论文

A mini review on strategies for heterogenization of rhodium-based hydroformylation catalysts

Cunyao Li, Wenlong Wang, Li Yan, Yunjie Ding

期刊论文

Catalytic reduction of water pollutants: knowledge gaps, lessons learned, and new opportunities

期刊论文

Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling of benzoic acids using sodium chlorite as oxidant

Yun Liu, Youquan Zhu, Chaojun Li

期刊论文