The dual role of micelles as templates and reducing agents for the fabrication of catalytically active hollow silver nanospheres

2015 ◽  
Vol 51 (4) ◽  
pp. 733-736 ◽  
Author(s):  
Manickam Sasidharan ◽  
Chenrayan Senthil ◽  
Vandana Kumari ◽  
Asim Bhaumik
Keyword(s):  
Catalytic Activity ◽  
Oxidation Reaction ◽  
Triblock Copolymer ◽  
Reducing Agents ◽  
Dual Role ◽  
Reducing Agent ◽  
Silver Nanospheres ◽  
Catalytically Active ◽  
Villiger Oxidation

A simple and efficient protocol for fabrication of colloidal hollow Ag nanospheres of size less than 30 nm using a triblock copolymer in the absence of any reducing agent is reported, which showed excellent catalytic activity in the Baeyer–Villiger oxidation reaction.

scholarly journals Role of CO2 During Oxidative Dehydrogenation of Propane Over Bulk and Activated-Carbon Supported Cerium and Vanadium Based Catalysts

2021 ◽  
Author(s):  
Petar Djinović ◽  
Janez Zavašnik ◽  
Janvit Teržan ◽  
Ivan Jerman
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Oxidative Dehydrogenation ◽  
Active Phase ◽  
Lattice Oxygen ◽  
Chemisorbed Oxygen ◽  
Catalytically Active ◽  
Temperature Programmed ◽  
Propane Cracking

AbstractCeO2, V2O5 and CeVO4 were synthesised as bulk oxides, or deposited over activated carbon, characterized by XRD, HRTEM, CO2-TPO, C3H8-TPR, DRIFTS and Raman techniques and tested in propane oxidative dehydrogenation using CO2. Complete oxidation of propane to CO and CO2 is favoured by lattice oxygen of CeO2. The temperature programmed experiments show the ~ 4 nm AC supported CeO2 crystallites become more susceptible to reduction by propane, but less prone to re-oxidation with CO2 compared to bulk CeO2. Catalytic activity of CeVO4/AC catalysts requires a 1–2 nm amorphous CeVO4 layer. During reaction, the amorphous CeVO4 layer crystallises and several atomic layers of carbon cover the CeVO4 surface, resulting in deactivation. During reaction, V2O5 is irreversibly reduced to V2O3. The lattice oxygen in bulk V2O5 favours catalytic activity and propene selectivity. Bulk V2O3 promotes only propane cracking with no propene selectivity. In VOx/AC materials, vanadium carbide is the catalytically active phase. Propane dehydrogenation over VC proceeds via chemisorbed oxygen species originating from the dissociated CO2. Graphic Abstract

New mesoporous magnesium–aluminum mixed oxide and its catalytic activity in liquid phase Baeyer–Villiger oxidation reaction

2012 ◽  
Vol 71 ◽  
pp. 564-572 ◽  
Author(s):  
Manidipa Paul ◽  
Nabanita Pal ◽  
John Mondal ◽  
Manickam Sasidharan ◽  
Asim Bhaumik
Keyword(s):  
Catalytic Activity ◽  
Liquid Phase ◽  
Mixed Oxide ◽  
Oxidation Reaction ◽  
Villiger Oxidation

Investigation of the crystal structure of Cu-Fe bimetal oxide and their catalytic activity for the Baeyer–Villiger oxidation reaction

2017 ◽  
Vol 439 ◽  
pp. 108-117 ◽  
Author(s):  
Wenbin Gao ◽  
Shuwen Li ◽  
Hongfei Huo ◽  
Feng Li ◽  
Yuanyuan Yang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Oxidation Reaction ◽  
Villiger Oxidation

Deposition of Au nanoparticles inside porous CeO2 nanocubes using Langmuir–Blodgett technique

2018 ◽  
Vol 42 (2) ◽  
pp. 1379-1386 ◽  
Author(s):  
Subhasis Das ◽  
Gourab Bhattacharjee ◽  
Biswarup Satpati ◽  
Mukesh Kumar ◽  
Sasanka Deka ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Dual Role ◽  
Reducing Agent ◽  
Langmuir Blodgett

AuCl4-ions are reduced to Au0 inside the pores of CeO2 nanocubes by oleylamine, which has the dual role of capping and reducing agent.

Dual role of glycine as a chemical functionalizer and a reducing agent in the preparation of graphene: an environmentally friendly method

2012 ◽  
Vol 22 (19) ◽  
pp. 9696 ◽  
Author(s):  
Saswata Bose ◽  
Tapas Kuila ◽  
Ananta Kumar Mishra ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Environmentally Friendly ◽  
Dual Role ◽  
Reducing Agent ◽  
Environmentally Friendly Method

Dual role of hydrogen peroxide on the oxidase-like activity of nanoceria and its application for colorimetric hydrogen peroxide and glucose sensing

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 59939-59945 ◽  
Author(s):  
Ruochen Guo ◽  
Yanru Wang ◽  
Shaoxuan Yu ◽  
Wenxin Zhu ◽  
Fangqing Zheng ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Cerium Oxide ◽  
Glucose Sensing ◽  
Dual Role ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Chromogenic Substrate

Nanoceria (cerium oxide nanoparticles) exhibits excellent catalytic activity towards chromogenic substrate 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2), which has been reported.

Drag Reducing Agent: A Multi-Use Tool for Liquid Pipeline Companies

1996 ◽  
Author(s):  
David H. Rew ◽  
Steven R. Sandman
Keyword(s):  
Electric Power ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Lessons Learned ◽  
Capacity Increase ◽  
Pipe Line ◽  
Multiple Uses

The role of Drag Reducing Agents (DRA) at Lakehead Pipe Line (LPL) has expanded considerably in recent years. It is now a multi-purpose tool that helps manage electric power usage as well as having traditional capacity increase uses. Indeed, DRA is now an important part of operating the LPL system. This paper examines the multiple uses of DRA as used by LPL. It also describes the structure of the DRA program within the company and provides a summary of “lessons learned” since the DRA program started at LPL in 1991. This information should be useful for anyone who is considering implementing a DRA program.

Mechanochemical preparation of advanced catalytically active bifunctional Pd-containing nanomaterials for aqueous phase hydrogenation

2015 ◽  
Vol 5 (4) ◽  
pp. 2085-2091 ◽  
Author(s):  
Majd Al-Naji ◽  
Alina M. Balu ◽  
Anca Roibu ◽  
Michael Goepel ◽  
Wolf-Dietrich Einicke ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Porous Materials ◽  
Aqueous Phase ◽  
Pd Nanoparticles ◽  
Reducing Agent ◽  
Mechanochemical Method ◽  
Reactive Milling ◽  
Catalytically Active ◽  
Supported Pd

The preparation of supported Pd nanoparticles on porous materials was successfully achieved using a simple, fast and efficient reactive milling (mechanochemical) method. The catalytic activity of different Pd/Al-SBA-15 and Pd/Al-MCF materials was investigated in the hydrogenation of p-nitrophenol (PNP) to p-aminophenol (PAP) using NaBH4 as a reducing agent.

Sign in / Sign up

Export Citation Format

Share Document