☆ 4.6 Article

Effect of Co-B supporting methods on the hydrogenation of m-chloronitrobenzene over Co-B/CNTs amorphous alloy catalysts

APPLIED CATALYSIS A-GENERAL (2016)

Journal

APPLIED CATALYSIS A-GENERAL

Volume 514, Issue -, Pages 248-252

Publisher

ELSEVIER

DOI: 10.1016/j.apcata.2016.01.035

Keywords

Co-B amorphous alloy; Supporting method; Carbon nanotubes; Hydrogenation; m-Chloronitrobenzene

Categories

Chemistry, Physical Environmental Sciences

Funding

National Natural Science Foundation of China [21276048]
Education Department of Heilongjiang Province [12541060]
Youth Foundation of Northeast Petroleum University [2013NQ112]

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Abstract

Carbon nanotubes (CNTs)-supported Co-B amorphous alloy catalysts, with selective deposition of Co-B particles inside or outside of CNTs (labeled as Co-B-in/CNTs and Co-B-out/CNTs), were prepared based on the difference in the interface energies of organic and aqueous solutions with the CNTs surface. The catalysts were tested for the liquid-phase hydrogenation of m-chloronitrobenzene (m-CNB) to m-chloroaniline. Compared with Co-B-out/CNTs, Co-B-in/CNTs shows smaller, homogeneous size, and greatly improved thermal stability. The hydrogenation of m-CNB over Co-B-out/CNTs occurs on the outside of CNTs, while the hydrogenation of m-CNB over Co-B-in/CNTs occurs in the nanospace inside of CNTs. Co-B-in/CNTs exhibits a much higher activity than Co-B-out/CNTs. (C) 2016 Elsevier B.V. All rights reserved.

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Harnessing reactive hydrogen species via H2O2 photolysis for reduction of CO2 to CH3OH using CaIn2S4@ZnMOF photocatalyst

Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu

Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.

APPLIED CATALYSIS A-GENERAL (2024)

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Article Chemistry, Physical

Numerous active sites in self-supporting Co3O4 nanobelt array for boosted and stabilized 5-hydroxymethylfurfural electro-oxidation

Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang

Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.

APPLIED CATALYSIS A-GENERAL (2024)

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Article Chemistry, Physical

Amorphous silica-alumina modified with silver as an efficient catalyst for vapor-phase dehydration of 1,3-butanediol to 1,3-butadiene

Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato

Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.

APPLIED CATALYSIS A-GENERAL (2024)

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