Effect of carbon nanosheets with different graphitization degrees as a support of noble metals on selective hydrogenation of cinnamaldehyde

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98356-98364 ◽  
Author(s):  
Qing Han ◽  
Yunfei Liu ◽  
Dong Wang ◽  
Fulong Yuan ◽  
Xiaoyu Niu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Noble Metals ◽  
Carbon Nanosheets

Effect of carbon nanosheets with different graphitization degrees on the catalytic activity of Pt/CNS and Pd/CNS was investigated in selective hydrogenation of cinnamaldehyde.

scholarly journals Catalytic properties of nanocarbon materials in reaction of selective hydrogenation of acetylene

2021 ◽  
pp. 280-295
Author(s):  
Igor B. Bychko ◽  
◽  
Alexander A. Abakumov ◽  
Andrii I. Trypolskyi ◽  
Peter E. Strizhak ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Noble Metals ◽  
Carbon Nanomaterials ◽  
Catalytic Properties ◽  
Hydrogenation Reaction ◽  
Gas Phases ◽  
Selective Hydrogenation Of Acetylene ◽  
Nanocarbon Materials ◽  
Hydrogenation Reactions

The chapter presents the results of studies of the catalytic properties of nanocarbon materials based on carbon nanotubes and reduced graphene oxide in the hydrogenation of ethylene, acetylene and ethylene-acetylene mixture by molecular hydrogen at atmosphere pressure. The current state of scientific approaches to the creation of nanocarbon metal-free catalysts for the hydrogenation reactions in both liquid and gas phases is presented. A possible nature of active center of the hydrogenation reaction located on the surface of the nanocarbon material is discussed. It is shown that the catalytic activity of the nanocarbon materials is not associated with metal impurities. The correlation between the structural characteristics of carbon nanomaterials and their catalytic properties in the hydrogenation reactions of unsaturated hydrocarbons is demonstrated. A comparative analysis of the catalytic activity of nanocarbon materials and catalysts that contain noble metals in the hydrogenation reaction of acetylene is presented. Finally, the fundamental possibility of creating a nanocarbon catalyst for selective hydrogenation of acetylene in excess ethylene is shown.

scholarly journals Improving the Performance of Zn-Air Batteries with N-Doped Electroexfoliated Graphene

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2115 ◽  
Author(s):  
Anna Ilnicka ◽  
Malgorzata Skorupska ◽  
Piotr Romanowski ◽  
Piotr Kamedulski ◽  
Jerzy P. Lukaszewicz
Keyword(s):  
Catalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Noble Metals ◽  
Electrode Materials ◽  
Low Cost ◽  
Rapid Development ◽  
Reduction Reaction ◽  
Graphene Sheets ◽  
High Catalytic Activity ◽  
Energy Storage Devices

The constantly growing demand for active, durable, and low-cost electrocatalysts usable in energy storage devices, such as supercapacitors or electrodes in metal-air batteries, has triggered the rapid development of heteroatom-doped carbon materials, which would, among other things, exhibit high catalytic activity in the oxygen reduction reaction (ORR). In this article, a method of synthesizing nitrogen-doped graphene is proposed. Few-layered graphene sheets (FL-graphene) were prepared by electrochemical exfoliation of commercial graphite in a Na2SO4 electrolyte with added calcium carbonate as a separator of newly-exfoliated FL-graphene sheets. Exfoliated FL-graphene was impregnated with a suspension of green algae used as a nitrogen carrier. Impregnated FL-graphene was carbonized at a high temperature under the flow of nitrogen. The N-doped FL-graphene was characterized through instrumental methods: high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Electrochemical performance was determined using cyclic voltamperometry and linear sweep voltamperometry to check catalytic activity in ORR. The N-doped electroexfoliated FL-graphene obeyed the four-electron transfer pathways, leading us to further test these materials as electrode components in rechargeable zinc-air batteries. The obtained results for Zn-air batteries are very important for future development of industry, because the proposed graphene electrode materials do not contain any heavy and noble metals in their composition.

Selective hydrogenation of nitroarenes to amines by ligand-assisted Pd nanoparticles: influence of donor ligands on catalytic activity

2019 ◽  
Vol 43 (10) ◽  
pp. 4253-4260 ◽  
Author(s):  
Gauravjyoti D. Kalita ◽  
Podma P. Sarmah ◽  
Pallab Kr. Saikia ◽  
Lakshi Saikia ◽  
Pankaj Das
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Pd Nanoparticles ◽  
Donor Ligands

A simple and facile approach for the synthesis of tunable ligand-assisted Pd nanoparticles for selective hydrogenation of nitroarenes.

ChemInform Abstract: Pd Nanoparticles Dispersed on Solid Supports: Synthesis, Characterization and Catalytic Activity on Selective Hydrogenation of Olefins in Aqueous Media.

ChemInform ◽  
2011 ◽  
Vol 42 (16) ◽  
pp. no-no
Author(s):  
Minkyung Lim ◽  
Kathlia A. De Castro ◽  
Seungchan Oh ◽  
Kangsuk Lee ◽  
Young-Wook Chang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Aqueous Media ◽  
Pd Nanoparticles ◽  
Solid Supports

The role of pillaring in MCM-22 on the dispersion of noble metals and catalytic activity

2016 ◽  
Vol 76 ◽  
pp. 169-178 ◽  
Author(s):  
Anna Wojtaszek-Gurdak ◽  
Izabela Sobczak ◽  
Kalina Grzelak ◽  
Maria Ziolek ◽  
Urs Hartfelder ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Noble Metals

scholarly journals Facile synthesis of biomass-based carbon materials nano-Ni-based catalysts and its application in selective hydrogenation of alkynes

2021 ◽  
Author(s):  
Jianguo liu ◽  
Jiangmin Sun ◽  
Longlong Ma
Keyword(s):  
Catalytic Activity ◽  
Selective Hydrogenation ◽  
Carbon Material ◽  
Large Scale ◽  
High Efficiency ◽  
Environmentally Friendly ◽  
Metal Catalyst ◽  
High Catalytic Activity ◽  
Chemical Research ◽  
Nickel Metal

The development of high efficiency, excellent selectivity, and super activity metal catalyst for chemical selective hydrogenation of alkynes to olefin is of great significance in the field of the chemical industry. At the same time, the development of a large number of available base metal catalysts for organic conversion remains an important objective of chemical research. Herein, we report a facile preparation of a simple, high catalytic activity, environmentally friendly, and inexpensive biomass carbon material supported nano-nickel catalyst from lignin residue. The entire preparation process of the catalyst is simple, reliable, economical, and environmentally friendly, which provides a potential utilization prospect for large-scale industrial applications of biomass-based carbon material catalysts. Biomass-based lignin residues can not only reduce the high oxidation state of nickel ions into nickel nanoparticles by the in-situ reducing gas generated during the calcination process, but the mesoporous structure of lignin residue also promotes the adsorption of nickel metal, which greatly improved the catalytic activity of biomass-based Ni-based catalysts. The simple synthetic green, cost-effective and sustainable biomass-based Ni-based catalyst shows good performance in the selective hydrogenation of phenylacetylene, reaching 97.2% conversion and 84.3% styrene selectivity, respectively.

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