Ultra-small and recyclable zero-valent iron nanoclusters for rapid and highly efficient catalytic reduction of p-nitrophenol in water

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 1000-1010 ◽  
Author(s):  
Dongyang Shi ◽  
Guifen Zhu ◽  
Xiaodi Zhang ◽  
Xia Zhang ◽  
Xiang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Reduction ◽  
Zero Valent Iron ◽  
High Catalytic Activity ◽  
Highly Efficient

Zero-valent iron nanoclusters with an ultrafine size have been prepared by a micelle-assisted process, and exhibit high catalytic activity and stability.

scholarly journals Target-triggered cascade assembly of a catalytic network as an artificial enzyme for highly efficient sensing

2017 ◽  
Vol 8 (7) ◽  
pp. 4833-4839 ◽  
Author(s):  
Lei Zhang ◽  
Fengjiao Ma ◽  
Jianping Lei ◽  
Jintong Liu ◽  
Huangxian Ju
Keyword(s):  
Catalytic Activity ◽  
Horseradish Peroxidase ◽  
Signal Amplification ◽  
High Catalytic Activity ◽  
Artificial Enzyme ◽  
Highly Efficient ◽  
Catalytic Network

A hemin-based enzymatic network is constructed with high catalytic activity that is comparable to natural horseradish peroxidaseviatriple signal amplification.

Role of microporous Janus silica nanosheets in the assembly of ultra-small Ag nanoparticles with high catalytic activity

2021 ◽  
Vol 50 (1) ◽  
pp. 208-216
Author(s):  
Mengnan Yang ◽  
Zhaoli Yan ◽  
Tiantian Li ◽  
Bing Liu ◽  
Qiangshan Jing ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ag Nanoparticles ◽  
High Catalytic Activity ◽  
Charged Surface ◽  
Highly Efficient ◽  
Surface Hydroxyls

Negatively charged surface hydroxyls and micropores of Janus silica nanosheets play a particular role in the highly efficient and dispersed assembly of ultra-small Ag nanoparticles with high catalytic activity.

Noble-metal-free NiFe nanoparticles immobilized on nano CeZrO2 solid solutions for highly efficient hydrogen production from hydrous hydrazine

2019 ◽  
Vol 3 (11) ◽  
pp. 3071-3077 ◽  
Author(s):  
Hongtao Zou ◽  
Qilu Yao ◽  
Meiling Huang ◽  
Meihua Zhu ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Noble Metal ◽  
Solid Solutions ◽  
Reduction Method ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Metal Free ◽  
Highly Efficient ◽  
Hydrazine Solution

Noble-metal-free NiFe nanoparticles were successfully immobilized on nano CeZrO2 solid solutions by a simple impregnation–reduction method, exhibiting a high catalytic activity and 100% H2 selectivity for hydrogen generation from hydrazine solution.

Lanthanide clusters as highly efficient catalysts regarding carbon dioxide activation

2020 ◽  
Vol 44 (13) ◽  
pp. 5019-5022 ◽  
Author(s):  
Wei Hou ◽  
Gang Wang ◽  
Xiaojing Wu ◽  
Shuoyi Sun ◽  
Chunyang Zhao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Cyclic Carbonates ◽  
Highly Efficient ◽  
Carbon Dioxide Activation

Lanthanide clusters display a wide substrate scope and high catalytic activity for the insertion of CO2 into epoxides to form cyclic carbonates.

Covalently functionalized carbon nanotube supported Pd nanoparticles for catalytic reduction of 4-nitrophenol

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6609-6616 ◽  
Author(s):  
Xianmo Gu ◽  
Wei Qi ◽  
Xianzhu Xu ◽  
Zhenhua Sun ◽  
Liyun Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Catalytic Reduction ◽  
Cycloaddition Reaction ◽  
Pd Nanoparticles ◽  
Dipolar Cycloaddition ◽  
High Catalytic Activity ◽  
Pd Nanoparticle ◽  
Supported Pd

Carbon nanotubes (CNTs) were covalently functionalized via 1,3-dipolar cycloaddition reaction under microwave conditions. Then Pd nanoparticle/CNT nanocomposites were fabricated through strong electronic adsorption and H2 reduction, which exhibited high catalytic activity.

Effect of Preparation Methods on Ti-PILCs Catalysts in Selective Catalytic Reduction of NO by Propylene

2014 ◽  
Vol 1033-1034 ◽  
pp. 90-94 ◽  
Author(s):  
Qi Ying Wang ◽  
Zi Li Liu ◽  
Jun Rong Wu
Keyword(s):  
Catalytic Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Active Species ◽  
Bet Surface Area ◽  
High Catalytic Activity ◽  
Incipient Wetness Impregnation ◽  
Distribution Analysis ◽  
Preparation Methods ◽  
Reduction Of No

Different Cu-loading pillared clays catalysts were studied in selective catalytic reduction of NO by propylene. The catalyst prepared by incipient wetness impregnation (Cu/Ti-PILCs) had better catalytic activity and stability than that prepared by ion-exchanged method (Cu-Ti-PILCs). Cu/Ti-PILCs has higher BET surface area than Cu-Ti-PILCs. Pore size distribution analysis and XRD showed that Cu species dispersed well in Cu/Ti-PILCs but formed conglomeration in Cu-Ti-PILCs. TPR showed that Cu2+ species were the main active species on the Cu/Ti-PILCs, which was responsible for the high catalytic activity of catalyst.

High catalytic activity of mesoporous Co–N/C catalysts for aerobic oxidative synthesis of nitriles

2016 ◽  
Vol 6 (14) ◽  
pp. 5746-5753 ◽  
Author(s):  
Sensen Shang ◽  
Lianyue Wang ◽  
Wen Dai ◽  
Bo Chen ◽  
Ying Lv ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Efficient Synthesis ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Carbon Catalysts ◽  
Nitrogen Doped Carbon

We report the synthesis and assessment of novel mesoporous cobalt-coordinated nitrogen-doped carbon catalysts (meso-Co–N/C) for highly efficient synthesis of nitriles.

scholarly journals In Search of the Active Sites for the Selective Catalytic Reduction on Tungsten-Doped Vanadia Monolayer Catalysts supported by TiO2

2021 ◽  
Author(s):  
Mengru Li ◽  
Sung Sakong ◽  
Axel Gross
Keyword(s):  
Catalytic Activity ◽  
Selective Catalytic Reduction ◽  
Active Sites ◽  
Density Functional ◽  
Catalytic Reduction ◽  
Computational Study ◽  
Critical Role ◽  
Operating Conditions ◽  
High Catalytic Activity ◽  
Atomistic Structure

Tungsten-doped vanadia-based catalysts supported on anatase TiO<sub>2</sub> are used to reduce hazardous NO emissions through the selective catalytic reduction of ammonia, but their exact atomistic structure is still largely unknown. In this computational study, the atomistic structure of mixed tungsta-vanadia monolayers on TiO<sub>2</sub> support under typical operating conditions has been addressed by periodic density functional theory calculations. The chemical environment has been taken into account in a grand-canonical approach. We evaluate the stable catalyst structures as a function of the oxygen chemical potential and vanadium and tungsten concentrations. Thus we determine structural motifs of tungsta-vanadia/TiO<sub>2</sub> catalysts that are stable under operating conditions. Furthermore, we identify active sites that promise high catalytic activity for the selective catalytic reduction by ammonia. Our calculations reveal the critical role of the stoichiometry of the tungsta-vanadia layers with respect to their catalytic activity in the selective catalytic reduction.

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.

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