Confinement effect of carbon nanotubes on the product distribution of selective hydrogenation of cinnamaldehyde

AbstractThe effect of nanostructure on the thermal oxidation of atomized iron has been investigated. Above 500°C atomized iron is oxidized in the presence of air. However, when iron is compacted with multiwalled carbon nanotubes (MWCNT) this oxidation is shifted by more than 100°C. Iron is protected by the nanostructure environment A large number of compositions of atomic ratios of iron and MWCNT have been examined in this study to understand the effect in detail. The effect of nanostructure in the thermal oxidation of iron is interpreted as due to iron atom experiencing extensive overlap and confinement effect. causing spin transfer. Based on theoretical calculations reported in the literature this confinement effect of iron is suggested to produce a transformation from 3d64s2 to an effective configuration of 3d84s0 producing spintronics effect.

Download Full-text

Nanosizing Intermetallic Compounds Onto Carbon Nanotubes: Active and Selective Hydrogenation Catalysts

Angewandte Chemie International Edition ◽

10.1002/anie.201008013 ◽

2011 ◽

Vol 50 (43) ◽

pp. 10231-10235 ◽

Cited By ~ 99

Author(s):

Lidong Shao ◽

Wei Zhang ◽

Marc Armbrüster ◽

Detre Teschner ◽

Frank Girgsdies ◽

...

Keyword(s):

Carbon Nanotubes ◽

Intermetallic Compounds ◽

Selective Hydrogenation ◽

Hydrogenation Catalysts

Download Full-text

Thermo-responsive polymer grafted carbon nanotubes as the catalyst support for selective hydrogenation of cinnamaldehyde: Effects of surface chemistry on catalytic performance

Applied Catalysis A General ◽

10.1016/j.apcata.2019.02.009 ◽

2019 ◽

Vol 575 ◽

pp. 11-19 ◽

Cited By ~ 6

Author(s):

Jie Zhu ◽

Mengdi Dou ◽

Mohong Lu ◽

Xu Xiang ◽

Xuejie Ding ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Chemistry ◽

Selective Hydrogenation ◽

Catalyst Support ◽

Catalytic Performance ◽

Responsive Polymer

Download Full-text

Enter the Tubes: Carbon Nanotube Endohedral Catalysis

Catalysts ◽

10.3390/catal9020128 ◽

2019 ◽

Vol 9 (2) ◽

pp. 128 ◽

Cited By ~ 9

Author(s):

Daniel Iglesias ◽

Michele Melchionna

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Chemical Reactions ◽

Morphological Characteristics ◽

Confinement Effect ◽

Catalytic Processes ◽

The Individual

The unique morphological characteristics of carbon nanotubes (CNTs) present the intriguing opportunity of exploiting the inner cavity for carrying out chemical reactions. Such reactions are catalysed either by the individual tubes that function both as catalysts and nanoreactors or by additional catalytic species that are confined within the channel. Such confinement creates what is called “confinement effect”, which can result in different catalytic features affecting activity, stability and selectivity. The review highlights the recent major advancements of catalysis conducted within the CNTs, starting from the synthesis of the catalytic composite, and discussing the most notable catalytic processes that have been reported in the last decade.

Download Full-text