Spatial acid–base–Pd triple-sites of a hierarchical core–shell structure for three-step tandem reaction

2020 ◽  
Vol 56 (46) ◽  
pp. 6297-6300 ◽  
Author(s):  
Jian Wu ◽  
Gang-Gang Chang ◽  
You-Qing Peng ◽  
Xiao-Chen Ma ◽  
Shan-Chao Ke ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Shell Structure ◽  
Tandem Reaction ◽  
Core Shell ◽  
High Catalytic Activity ◽  
Acid Base ◽  
Core Shell Structure

We present a hierarchical single catalyst with spatial acid–base–Pd triple-sites showing high catalytic activity and stability for the three-step D–K–H tandem reaction.

Preparation, Characterization and Visible-Light Catalytic Activity of Core-Shell Structure NiFe2O4@TiO2 Ferrite Nanoparticles

2016 ◽  
Vol 680 ◽  
pp. 272-277
Author(s):  
Zhou Li Lu ◽  
Peng Zhao Gao ◽  
Rui Xue Ma ◽  
Yu Kun Sun ◽  
Dong Yun Li
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Shell Structure ◽  
Shell Thickness ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Magnetic Core ◽  
Core Shell ◽  
Calcination Temperatures ◽  
Core Shell Structure

The core-shell structure NiFe2O4@TiO2 nanoparticles was successfully prepared using a sol-gel method, the influence of shell thickness and calcination temperatures on the composition, microstructure, magnetic properties and visible-light catalytic activity of the nanoparticles was studied by XRD, TEM, Uv–vis, vibrating sample magnetometer, etc. Results showed the main composition of core in NiFe2O4@TiO2 was spinel ferrite, and the shell was anatase TiO2, and theshell thickness increased significantly with the increase of TiO2 content, ranging from 10nm to 50nm. The Ms and Mr of nanoparticles decreased with the increase of TiO2 content, and no obvious reaction between the magnetic core and shell occurred; visible-light degradation percent of NiFe2O4@TiO2 nanoparticles increased along with the increase of TiO2 content, whereas the recovery rate of it decreased. Degradation percent and the recovery percent of NiFe2O4@TiO2-50 still reached 93.7% and 90.5%, even after 10 cycle times, respectively, possessing the excellent long-term stability.

Enhanced catalytic activity of cobalt nanoparticles encapsulated with an N-doped porous carbon shell derived from hollow ZIF-8 for efficient synthesis of nitriles from primary alcohols in water

2019 ◽  
Vol 21 (16) ◽  
pp. 4334-4340 ◽  
Author(s):  
Kang-kang Sun ◽  
Jia-lin Sun ◽  
Guo-Ping Lu ◽  
Chun Cai
Keyword(s):  
Catalytic Activity ◽  
Shell Structure ◽  
Cobalt Catalyst ◽  
Cobalt Nanoparticles ◽  
Core Shell ◽  
Efficient Synthesis ◽  
Primary Alcohols ◽  
Mild Conditions ◽  
Core Shell Structure ◽  
Unique Core

A cobalt catalyst derived from a unique core–shell structure based on hollow ZIF-8 and ZIF-67 is prepared for the synthesis of nitriles from alcohols in water under mild conditions.

Tuning the Band Structure of MoS2 via Co9S8@MoS2 Core–Shell Structure to Boost Catalytic Activity for Lithium–Sulfur Batteries

ACS Nano ◽  
2020 ◽  
Vol 14 (12) ◽  
pp. 17285-17294
Author(s):  
Boyu Li ◽  
Qingmei Su ◽  
Lintao Yu ◽  
Jun Zhang ◽  
Gaohui Du ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Band Structure ◽  
Shell Structure ◽  
Core Shell ◽  
Lithium Sulfur Batteries ◽  
Core Shell Structure ◽  
Lithium Sulfur

scholarly journals Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation

2018 ◽  
Vol 148 (8) ◽  
pp. 2315-2324
Author(s):  
Michelle Lukosi ◽  
Chengcheng Tian ◽  
Xinyi Li ◽  
Shannon M. Mahurin ◽  
Harry M. Meyer ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Shell Structure ◽  
Core Shell ◽  
The Core ◽  
Core Shell Structure

scholarly journals Bimetallic Au-Pd nanoparticles supported on silica with tunable core@shell structure: Enhanced catalytic activity of Pd(core)-Au(shell) over Au(core)-Pd(shell)

2021 ◽  
Author(s):  
Gauravjyoti Dutta Kalita ◽  
Podma Pollov Sarmah ◽  
Golap Kalita ◽  
Pankaj Das
Keyword(s):  
Catalytic Activity ◽  
Shell Structure ◽  
Pd Nanoparticles ◽  
Metal Salts ◽  
Core Shell ◽  
Core Shell Structure

A facile ligand-assisted approach of synthesizing bimetallic Au-Pd nanoparticles supported on silica with tuneable core@shell structure is presented. Manoeuvring the addition sequence of metal salts, both Aucore-Pdshell (Au@Pd-SiO2) and Pdcore-Aushell...

scholarly journals The stability and catalytic activity of W13@Pt42 core-shell structure

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Jin-Rong Huo ◽  
Xiao-Xu Wang ◽  
Lu Li ◽  
Hai-Xia Cheng ◽  
Yan-Jing Su ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure ◽  
The Stability

SiO2 (core)-TiO2 (shell) Structure as Catalyst Support for Oxidation of CO at Low Temperatures

2007 ◽  
Vol 334-335 ◽  
pp. 1025-1028
Author(s):  
Zi Yi Zong ◽  
Xi Jiang Yin ◽  
Li Fang Lew ◽  
Soo Yee Tan
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Shell Structure ◽  
Low Temperatures ◽  
Au Nanoparticles ◽  
Catalyst Support ◽  
High Thermal Stability ◽  
Core Shell ◽  
Oxidation Of Co ◽  
Core Shell Structure

In this study, TiO2 was successfully coated on Stober silica beads followed by depositing Au nanoparticles on this core-shell structure. The size of the Au nanoparticles was well controlled in the range of 2 – 7 nm. This composite exhibited high thermal stability. When used as a model catalyst for oxidation of CO at low temperatures, the Au/TiO2/SiO2 showed a much higher catalytic activity than the Au/SiO2 and Au/TiO2(P25) catalysts.

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