نتایج جستجو برای: magnetic nanocatalysts

تعداد نتایج: 339453  

Journal: :Chemical communications 2007
Nanfeng Zheng Galen D Stucky

A trace amount of metal carbonate, acetate or borate significantly boosts gold nanocatalysts in selective aerobic oxidation of alcohols under mild solvent-free conditions.

Journal: :Dalton transactions 2014
C C Gheorghiu B F Machado C Salinas-Martínez de Lecea M Gouygou M C Román-Martínez P Serp

Chiral rhodium hybrid nanocatalysts have been prepared by covalent anchorage of pyrrolidine-based diphosphine ligands onto functionalized CNTs. This work constitutes the first attempt at covalent anchoring of homogeneous chiral catalysts on CNTs. The catalysts, prepared with two different chiral phosphines, were characterized by ICP, XPS, N2 adsorption and TEM, and have been tested in the asymm...

2016
Fan Cai Lefu Yang Shiyao Shan Derrick Mott Bing H. Chen Jin Luo Chuan-Jian Zhong

Alloying Pd with Cu is important for catalytic reactions such as denitrification reaction and CO oxidation reaction, but understanding of the catalyst preparation and its correlation with the catalyst’s activity and selectivity remains elusive. Herein, we report the results of investigations of the preparation of PdCu alloy nanocatalysts using different methods and the catalytic properties of t...

Journal: :Chemical communications 2015
Jianping Huang Hengquan Yang

A smart Pickering emulsion catalytic system is constructed, which not only exhibits fivefold reaction rate enhancement effects in comparison to the conventional biphasic system but also can be facilely demulsified by tuning pH, allowing for in situ recycling nanocatalysts.

Journal: :Chemical communications 2013
Juan Tang Jun Zhou Qunfang Li Dianping Tang Guonan Chen Huanghao Yang

Platinum-cerium oxide hybrid nanocatalysts (CeO(2)-Pt) were for the first time designed as bionanolabels for highly efficient electrochemical immunosensing of low-abundance proteins coupling nanocatalyst-based redox cycling with in situ signal amplification strategy.

Journal: :Chemical communications 2009
Chi Him A Tsang Yang Liu Zhenhui Kang Dorothy Duo Duo Ma Ning-Bew Wong Shuit-Tong Lee

Metal (Au, Cu)-modified Si nanowires (SiNWs) are superior catalysts for selective oxidation of hydrocarbons, while SiNWs are a powerful substrate support (enhance efficiency and selectivity) for nanocatalysts.

2016
Yan Wang Zhihui Wen Huoli Zhang Guohua Cao Qi Sun Jianliang Cao Xiaoguang Duan

Developing an efficient non-noble catalyst for CO oxidation with high catalytic activity remains a challenge for practical applications. In this work, CuO nanorods decorated reduced graphene oxide (RGO) nanocatalysts were prepared via a facile one-step hydrothermal method. The structure and morphology of the as-prepared samples were characterized by XRD, Raman spectroscopy, SEM, TEM, and X-ray ...

Journal: :Water research 2008
Altai Bach Grigory Zelmanov Raphael Semiat

A novel approach for the recovery of spent activated carbon by an advanced oxidation process using iron oxide-based nanocatalysts was proposed and investigated. Model organic contaminants, such as ethylene glycol and phenol, were chosen for this study as water pollutants. It was shown that there are several advantages in using catalytic oxidation recovery of activated carbon with iron oxide-bas...

Journal: :Journal of the American Chemical Society 2016
Wangcheng Zhan Qian He Xiaofei Liu Yanglong Guo Yanqin Wang Li Wang Yun Guo Albina Y Borisevich Jinshui Zhang Guanzhong Lu Sheng Dai

Supported gold (Au) nanocatalysts hold great promise for heterogeneous catalysis; however, their practical application is greatly hampered by poor thermodynamic stability. Herein, a general synthetic strategy is reported where discrete metal nanoparticles are made resistant to sintering, preserving their catalytic activities in high-temperature oxidation processes. Taking advantage of the uniqu...

2014
L D Francis J Rivas M José-Yacamán Jose Veiga

Nanomaterials including nanoparticles, nanowires and nanotubes play an important role in heterogeneous catalysis. Thanks to the rapid improvement of the electron microscopic techniques and with the advent of aberration corrected electron microscopy as well as theoretical methodologies, the potential effects induced by nanocatalysts are better understood than before by unravelling their atomic s...

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