On the Promoting Role of Ag in Selective Hydrogenation Reactions over Pd−Ag Bimetallic Catalysts:  A Theoretical Study

2007 ◽  
Vol 111 (18) ◽  
pp. 6852-6856 ◽  
Author(s):  
Silvia González ◽  
Konstantin M. Neyman ◽  
Shamil Shaikhutdinov ◽  
Hans-Joachim Freund ◽  
Francesc Illas
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Theoretical Study ◽  
Hydrogenation Reactions

scholarly journals Selective Hydrogenation Properties of Ni-Based Bimetallic Catalysts

Eng ◽  
2022 ◽  
Vol 3 (1) ◽  
pp. 60-77
Author(s):  
Nobutaka Yamanaka ◽  
Shogo Shimazu
Keyword(s):  
High Activity ◽  
Selective Hydrogenation ◽  
Electronic Structures ◽  
Bimetallic Catalysts ◽  
Bimetallic Nanoparticles ◽  
Ni Catalyst ◽  
Electronic Effects ◽  
Catalytic Systems ◽  
Chemoselective Hydrogenation ◽  
Hydrogenation Reactions

Metallic Ni shows high activity for a variety of hydrogenation reactions due to its intrinsically high capability for H2 activation, but it suffers from low chemoselectivity for target products when two or more reactive functional groups are present on one molecule. Modification by other metals changes the geometric and electronic structures of the monometallic Ni catalyst, providing an opportunity to design Ni-based bimetallic catalysts with improved activity, chemoselectivity, and durability. In this review, the hydrogenation properties of these catalysts are described starting from the typical methods of preparing Ni-based bimetallic nanoparticles. In most cases, the reasons for the enhanced catalysis are discussed based on the geometric and electronic effects. This review provides new insights into the development of more efficient and well-structured non-noble metal-based bimetallic catalytic systems for chemoselective hydrogenation reactions.

Insight into the role of iron in platinum-based bimetallic catalysts for selective hydrogenation of cinnamaldehyde

2021 ◽  
Author(s):  
Ying Zhang ◽  
Jinfang Su ◽  
Junnan Chen ◽  
Chengshan Dai ◽  
Bingsen Zhang
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Insight Into

Nitrogen-Doped Carbon Xerogels Supporting Palladium Nanoparticles for Selective Hydrogenation Reactions: The Role of Pyridine Nitrogen Species

ChemCatChem ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 1291-1299 ◽  
Author(s):  
Duihai Tang ◽  
Xue Sun ◽  
Dan Zhao ◽  
Junjiang Zhu ◽  
Wenting Zhang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Palladium Nanoparticles ◽  
Nitrogen Species ◽  
Nitrogen Doped ◽  
Carbon Xerogels ◽  
Pyridine Nitrogen ◽  
Hydrogenation Reactions ◽  
Nitrogen Doped Carbon

Role of Low-Coordinated Ce in Hydride Formation and Selective Hydrogenation Reactions on CeO2 Surfaces

ACS Catalysis ◽  
2021 ◽  
pp. 624-632
Author(s):  
Zhi-Qiang Wang ◽  
De-Ren Chu ◽  
Hui Zhou ◽  
Xin-Ping Wu ◽  
Xue-Qing Gong
Keyword(s):  
Selective Hydrogenation ◽  
Hydride Formation ◽  
Hydrogenation Reactions

Role of Man in Production and Social Systems Based on Digital Technologies

2020 ◽  
pp. 6-13
Author(s):  
V. K. Potemkin
Keyword(s):  
Theoretical Study ◽  
Social Systems ◽  
Digital Technologies ◽  
Changing Role ◽  
Consistent Approach ◽  
Social Improvement

The article presents the results of a theoretical study of the influence processes of the developed digital technologies and the activities of enterprises and organizations on the changing role of man in labor and their social improvement. The necessity of a balanced and consistent approach to create conditions for the use of digital technologies in practical activities and determining the con- sequences not only in enterprises and organizations, but also in the conscious behavior and social realities of all workers, without exception, is substantiated. The main directions of the development of digital technologies are determined, involving the wide participation of workers in their use in enterprises and organizations.

scholarly journals The Role of La2O3 in Enhancement the Radiation Shielding Efficiency of the Tellurite Glasses: Monte-Carlo Simulation and Theoretical Study

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3913
Author(s):  
Aljawhara H. Almuqrin ◽  
Mohamed Hanfi ◽  
K. G. Mahmoud ◽  
M. I. Sayyed ◽  
Hanan Al-Ghamdi ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Theoretical Study ◽  
Radiation Shielding ◽  
Photon Flux ◽  
Transmission Factor ◽  
Tellurite Glasses ◽  
Attenuation Coefficients ◽  
Binary Glass ◽  
Buildup Factors

The radiation shielding competence was examined for a binary glass system xLa2O3 + (1 − x) TeO2 where x = 5, 7, 10, 15, and 20 mol% using MCNP-5 code. The linear attenuation coefficients (LACs) of the glasses were evaluated, and it was found that LT20 glass has the greatest LAC, while LT5 had the least LAC. The transmission factor (TF) of the glasses was evaluated against thicknesses at various selected energies and was observed to greatly decrease with increasing thickness; for example, at 1.332 MeV, the TF of the LT5 glass decreased from 0.76 to 0.25 as the thickness increased from 1 to 5 cm. The equivalent atomic number (Zeq) of the glasses gradually increased with increasing photon energy above 0.1 MeV, with the maximum values observed at around 1 MeV. The buildup factors were determined to evaluate the accumulation of photon flux, and it was found that the maximum values for both can be seen at around 0.8 MeV. This research concluded that LT20 has the greatest potential in radiation shielding applications out of the investigated glasses due to the glass having the most desirable parameters.

Ceria-Based Catalysts for Selective Hydrogenation Reactions: A Critical Review

2021 ◽  
Author(s):  
Kourosh Razmgar ◽  
Mohammednoor Altarawneh ◽  
Ibukun Oluwoye ◽  
Gamini Senanayake
Keyword(s):  
Selective Hydrogenation ◽  
Critical Review ◽  
Hydrogenation Reactions

Theoretical Study of Selective Hydrogenation of CO2 to Methanol over Pt4/In2O3 Model Catalyst

2021 ◽  
Author(s):  
Kaihang Sun ◽  
Ning Rui ◽  
Chenyang Shen ◽  
Chang-jun Liu
Keyword(s):  
Selective Hydrogenation ◽  
Theoretical Study ◽  
Model Catalyst ◽  
Hydrogenation Of Co2
Sign in / Sign up

Export Citation Format

Share Document