Hollow porous Cu–Au particles with high catalytic activity for the reduction of 4-nitrophenol

CrystEngComm ◽  
2020 ◽  
Vol 22 (26) ◽  
pp. 4386-4392
Author(s):  
Jianwei Jiang ◽  
Sungho Yoon ◽  
Longhai Piao
Keyword(s):  
Catalytic Activity ◽  
Selective Oxidation ◽  
Electrocatalytic Activity ◽  
Hollow Structure ◽  
High Catalytic Activity

A Cu-based bimetallic hollow structure can be effectively used to enhance the selective oxidation and electrocatalytic activity of a catalyst and to reduce its cost.

Hollow structured CoSn(OH)6-supported Pt for effective room-temperature oxidation of gaseous formaldehyde

2016 ◽  
Vol 09 (06) ◽  
pp. 1642009 ◽  
Author(s):  
Jing Zhou ◽  
Yong Zhao ◽  
Lifan Qin ◽  
Chen Zeng ◽  
Wei Xiao
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
Room Temperature ◽  
Synergetic Effect ◽  
Hollow Structure ◽  
Pt Nanoparticles ◽  
Hydroxyl Groups ◽  
High Catalytic Activity ◽  
Temperature Oxidation ◽  
X Ray

Uniform CoSn(OH)6 hollow nanoboxes and the derivative with Pt loading (Pt/CoSn(OH)6) were herein synthesized and characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). SEM and TEM analyses showed that CoSn(OH)6 possessed mesoporous hollow structure and Pt nanoparticles with size of 2–8[Formula: see text]nm were uniformly dispersed on the surface of CoSn(OH)6 nanoboxes. The performances of the catalysts for the formaldehyde (HCHO) removal at room temperature were evaluated. These Pt/CoSn(OH)6 catalysts exhibited a remarkable catalytic activity as well as stability for room-temperature oxidative decomposition of gaseous HCHO, while the corresponding CoSn(OH)6 only showed adsorption. The synergetic effect between the highly dispersed Pt nanoparticles and the CoSn(OH)6 nanoboxes with mesoporous hollow structure, a large surface area and abundant surface hydroxyl groups is considered to be the main reason for the observed high catalytic activity of Pt/CoSn(OH)6.

PtAu alloy nanoparticles supported on thermally expanded graphene oxide as a catalyst for the selective oxidation of glycerol

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37112-37118 ◽  
Author(s):  
Gao-Yuan Yang ◽  
Shuai Shao ◽  
Yi-Hu Ke ◽  
Chun-Ling Liu ◽  
Hui-Fang Ren ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Selective Oxidation ◽  
High Catalytic Activity ◽  
Alloy Nanoparticles

Thermally expanded graphene oxide supported PtAu alloy nanoparticles showed high catalytic activity in the oxidation of glycerol in base-free aqueous solution.

SYNTHESIS OF Ni–Bi–P HOLLOW MICROSPHERES WITH OUTSTANDINGLY HIGH ACTIVITY TOWARD THE CATALYTIC REDUCTION OF p-NITROPHENOL

2019 ◽  
Vol 26 (05) ◽  
pp. 1850192
Author(s):  
XIANGRUI MENG ◽  
MEIFENG HAO ◽  
YIWEI JIANG ◽  
XIANGZHENYUE SUN ◽  
YAN WANG ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Reduction ◽  
Hollow Structure ◽  
Hollow Microspheres ◽  
High Catalytic Activity ◽  
P Elements ◽  
Composite Microspheres ◽  
Explosion Method ◽  
Space Limitation ◽  
Wet Explosion

A simple wet-explosion method was employed to synthesize the Ni–Bi–P composite microspheres. The hollow structure was obtained possibly due to the violent evolution of gas bubbles when the reaction reagents were mixed. The hollow microspheres of Ni–Bi–P exhibited outstanding high catalytic activity for the reduction of [Formula: see text]-nitrophenol ([Formula: see text]-NP) to form [Formula: see text]-aminophenol in the presence of NaBH4 within only 1[Formula: see text]s. Due to the space limitation, the hollow structure of Ni–Bi–P microspheres helps to accommodate and confine the molecules of NaBH4 and [Formula: see text]-NP within the small space where NaBH4 and [Formula: see text]-NP contact closely at Ni–Bi–P catalysts. The synergetic action of Ni, Bi and P elements also contributes the enhanced catalytic activity.

Size-controlled PdO/graphene oxides and their reduction products with high catalytic activity

RSC Advances ◽  
2014 ◽  
Vol 4 (56) ◽  
pp. 29563-29570 ◽  
Author(s):  
Jingjing Lin ◽  
Tao Mei ◽  
Meijiao Lv ◽  
Chang'an Zhang ◽  
Zhenfeng Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrazine Hydrate ◽  
Electrocatalytic Activity ◽  
Suzuki Reaction ◽  
High Catalytic Activity ◽  
Graphene Oxides ◽  
Highly Active ◽  
The Stability ◽  
Size Controlled ◽  
Better Than

Well-dispersed and size-controlled Pd/RGO with highly active catalysts was synthesized through reduction of PdO/GO with hydrazine hydrate and ammonia. The electrocatalytic activity and the stability of the as-prepared Pd/RGO are much better than those of commercial Pd/C catalysts for methanol electrooxidation and the Suzuki reaction.

scholarly journals Phosphorus-Doped Carbon Supported Vanadium Phosphate Oxides for Catalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1273
Author(s):  
Sha Wen ◽  
Kai Liu ◽  
Yi Tian ◽  
Yanping Xiang ◽  
Xianxiang Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Oxidation ◽  
High Catalytic Activity ◽  
Temperature Reaction ◽  
Vanadium Phosphate ◽  
Catalyst Amount ◽  
Air Atmosphere ◽  
Vpo Catalyst ◽  
Loading Amount ◽  
Phosphorus Doped

2,5-diformylfuran (DFF) is an important downstream product obtained by selective oxidation of the biomass-based platform compound 5-hydroxymethylfurfural (HMF). In this study, a phosphorus-doped carbon (P-C) supported vanadium phosphate oxide (VPO) catalyst was successfully prepared and showed remarkably high catalytic activity in the selective oxidation of HMF to produce DFF with air as an oxidant. The effects of the reaction temperature, reaction time, solvent, catalyst amount, and VPO loading amount were investigated. The results showed that an HMF conversion rate of 100% and a DFF yield of 97.0% were obtained under suitable conditions, and DMSO was found to be the most suitable solvent under an air atmosphere.

Facile synthesis of Pt–Pd nanodendrites and their superior electrocatalytic activity

2014 ◽  
Vol 2 (12) ◽  
pp. 4384-4390 ◽  
Author(s):  
Jing-Jing Lv ◽  
Jie-Ning Zheng ◽  
Shan-Shan Li ◽  
Li-Li Chen ◽  
Ai-Jun Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethylene Glycol ◽  
Electrocatalytic Activity ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Chemical Reduction Method ◽  
Facile Synthesis ◽  
Electrooxidation Of Methanol

Porous Pt–Pd nanodendrites were fabricated by a co-chemical reduction method using both PVP and urea as the co-stabilizing and co-structure-directing agents. The Pt–Pd nanodendrites displayed high catalytic activity and stability toward the electrooxidation of methanol and ethylene glycol in alkaline media.

Effects of Diameters on the Catalytic Activity of Spherical V-MCM-41 in the Selective Oxidation of Styrene

2012 ◽  
Vol 549 ◽  
pp. 137-140
Author(s):  
Yu Chen ◽  
Hua Qin ◽  
Xiao Bo Shi ◽  
Yan Kong
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Method ◽  
Selective Oxidation ◽  
Heterogeneous Catalysts ◽  
Molar Ratio ◽  
High Catalytic Activity ◽  
Precise Control ◽  
Mcm 41

Spherical V-MCM-41s with different diameter are synthesized by direct hydrothermal method through the precise control over the molar ratio of NaOH/TEOS. Vanadium supported on spherical MCM-41s is also prepared by impregnation methods. They are used as heterogeneous catalysts for the oxidation of styrene with H2O2 as oxidant. The results suggest that all catalysts have high catalytic activity, which increases with their diameter decreasing.

Nitrogen doped carbon spheres with wrinkled cages for the selective oxidation of 5-hydroxymethylfurfural to 5-formyl-2-furancarboxylic acid

2021 ◽  
Vol 57 (16) ◽  
pp. 2005-2008
Author(s):  
Jiaping Zhu ◽  
Chaojian Yao ◽  
Ayan Maity ◽  
Jielai Xu ◽  
Tong Zhan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Oxidation ◽  
High Catalytic Activity ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Nitrogen doped carbon spheres with wrinkled cages exhibited high catalytic activity and selectivity in the oxidation of 5-hydroxymethylfurfural to 5-formyl-2-furancarboxylic acid using TBHP as the oxidant.

scholarly journals Copper(ii)-containing tungstotellurates(vi): syntheses, structures and their catalytic performances in selective oxidation of thioethers

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22515-22521
Author(s):  
Xuanyao Li ◽  
Peihe Li ◽  
Jinghai Liu ◽  
Zhengguo Lin ◽  
Changwen Hu
Keyword(s):  
Catalytic Activity ◽  
Selective Oxidation ◽  
High Catalytic Activity ◽  
Ambient Conditions ◽  
Very High ◽  
Catalytic Performances

Two copper(ii)-containing tungstotellurates(vi) were synthesized and present very high catalytic activity for the selective oxidation of thioethers under ambient conditions.

Sign in / Sign up

Export Citation Format

Share Document