نتایج جستجو برای: electrocatalytic

تعداد نتایج: 5110  

2008
Msimelelo Siswana Kenneth I. Ozoemena Tebello Nyokong

It is shown that iron(II) tetra-aminophthalocyanine complex electropolymerized onto a multi-walled carbon nanotube-modified basal plane pyrolytic graphite electrode greatly enhanced the electrocatalytic detetion of amitrole (a toxic herbicide), resulting in a very low detection limit (0.5 nM) and excellent sensitivity of 8.80±0.44 μA/nM, compared to any known work reported so far. The electroca...

2014
Liangliang Tian Xiaohui Zhong Wanping Hu Bitao Liu Yunfeng Li

Cubic PtCu nanocages (NCs) were successfully synthesized through a redox reaction using cuprous oxide (Cu2O) as a sacrificial template and reducing agent. The porous PtCu NCs were composed of amounts of PtCu nanograins with an average particle size of 2.9 nm. The electrocatalytic performance of the PtCu NC electrode towards H2O2 was studied by cyclic voltammetry (CV) and chronoamperometry. The ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Jin-Yeon Lee Da-Hee Kwak Young-Woo Lee Seul Lee Kyung-Won Park

The electrocatalytic properties for electro-oxidation reactions of shape-controlled Pt-based catalysts have been improved by alloying with 2nd elements. In this study, we demonstrate cubic PtPd alloy nanoparticles synthesized using a thermal decomposition method. The cubic PtPd nanoparticles exhibit a homogeneous distribution of alloy nanostructures in the presence of Pt and Pd metallic phases....

2015
Rashda Naseer Sib Sankar Mal Ulrich Kortz Gordon Armstrong Fathima Laffir Calum Dickinson Mikhail Vagin Timothy McCormac

The difference in electrochemical properties of three crown-type polyoxometalates multisubstituted by Fe, Ni or Co ions and their precursor has been rationalized with respect to their electrocatalytic performances studied in solution and in the immobilized state within the layer-by-layer film formed with a positively charged pentaerythritol-based Ru(II)metallodendrimer. The film assembly was mo...

Journal: :ChemSusChem 2015
Debraj Chandra Naoto Abe Daisuke Takama Kenji Saito Tatsuto Yui Masayuki Yagi

We report the first accessible channel-like open pore architecture of ordered 2D hexagonal mesoporous IrO2 films and its utilization as an efficient anode for electrocatalytic water oxidation. A well-ordered mesostructure of circa 7 nm pores were obtained by a facile one-pot soft-templating strategy, employing a [Ir(OH)6](2-) precursor stabilized by a triblock copolymer "Pluronic F127" as a por...

Journal: :Bioelectrochemistry 2009
Jean Chrysostome Ndamanisha Liping Guo

This work reports on a novel nonenzymatic amperometric glucose sensor based on the ordered mesoporous carbon (OMC). Amperometric method was used to evaluate the electrocatalytic activity of the OMC modified electrode toward nonenzymatic glucose in alkaline media in presence and absence of chloride ions. The results indicated that OMC showed electrocatalytic activity for the oxidation of glucose...

2012
Gamze TAN Gülçin BOLAT Mehmet Ali ONUR Serdar ABACI

The potential application of biochemically modified electrodes was investigated for construction of a drug biosensor. The electrocatalytic response of lidocaine was examined through modified electrodes using the electron transfer ability of hemoglobin (Hb) immobilized on gold film modified with a self-assembled monolayer (SAM) of 3-mercaptopropionic acid (MPA). According to the results of volta...

Journal: :Nano letters 2009
Weilin Xu Hao Shen Yoon Ji Kim Xiaochun Zhou Guokun Liu Jiwoong Park Peng Chen

We report a single-molecule fluorescence study of electrocatalysis by single-walled carbon nanotubes (SWNTs) at single-reaction resolution. Applying super-resolution optical imaging, we find that the electrocatalysis occurs at discrete, nanometer-dimension sites on SWNTs. Single-molecule kinetic analysis leads to an electrocatalytic mechanism, allowing quantification of the reactivity and heter...

Journal: :Angewandte Chemie 2015
An-Liang Wang Xu-Jun He Xue-Feng Lu Han Xu Ye-Xiang Tong Gao-Ren Li

PdCo nanotube arrays (NTAs) supported on carbon fiber cloth (CFC) (PdCo NTAs/CFC) are presented as high-performance flexible electrocatalysts for ethanol oxidation. The fabricated flexible PdCo NTAs/CFC exhibits significantly improved electrocatalytic activity and durability compared with Pd NTAs/CFC and commercial Pd/C catalysts. Most importantly, the PdCo NTAs/CFC shows excellent flexibility ...

2012
Naigui Shang Ajay Kumar Nijuan Sun Surbhi Sharma Pagona Papakonstantinou Meixian Li Ross A. Blackley Wuzong Zhou Lisa S. Karlsson S. Ravi P. Silva

Vertical graphene nanoflake integrated films having a high density of edge planes have been used as an electrochemical platform to systematically investigate the immobilization, electrochemical oxidation kinetics and direct quantitative determination of natural DNA. Consistently, both transmission electron microscopy and atomic force microscopy observations demonstrate the presence of a self-as...

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