نتایج جستجو برای: pyrolytic graphite electrode

تعداد نتایج: 78440  

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...

The voltammetric performance of edge-plane pyrolytic graphite (EPG) electrode via adsorptive stripping voltammetry was investigated for study of the electrochemical behavior of omeprazole (OMZ) in aqueous solution. The results revealed that the oxidation of OMZ is an irreversible pH-dependent process that proceeds with the transfer of one electron and one proton in an adsorption-controlled mech...

The voltammetric performance of edge-plane pyrolytic graphite (EPG) electrode via adsorptive stripping voltammetry was investigated for study of the electrochemical behavior of omeprazole (OMZ) in aqueous solution. The results revealed that the oxidation of OMZ is an irreversible pH-dependent process that proceeds with the transfer of one electron and one proton in an adsorption-controlled mech...

Journal: :Journal of the American Chemical Society 2009
Fu-Ren F Fan Sungjin Park Yanwu Zhu Rodney S Ruoff Allen J Bard

Electrogenerated chemiluminescence (ECL) can be obtained from an electrochemically oxidized highly oriented pyrolytic graphite electrode or a graphene oxide suspension in an aqueous solution containing 0.1 M NaClO(4), phosphate buffer (PBS) (pH = 7.0) and 13 mM tri-n-propylamine. Single ECL events from individual graphene oxide nanosheets can be observed. The observation of ECL in such systems ...

Journal: :Bioelectrochemistry 2005
Sergey Shleev Anna Jarosz-Wilkolazka Anna Khalunina Olga Morozova Alexander Yaropolov Tautgirdas Ruzgas Lo Gorton

Electrochemical studies of laccases from basidiomycetes, i.e., Trametes hirsuta, Trametes ochracea, Coriolopsis fulvocinerea, Cerrena maxima, and Cerrena unicolor, have been performed. Direct (mediatorless) electrochemistry of laccases on graphite electrodes has been investigated with cyclic voltammetry, square wave voltammetry as well as potentiometry. For all mentioned high potential laccases...

Journal: :Physical chemistry chemical physics : PCCP 2014
Hiromitsu Uehara Yohei Uemura Takafumi Ogawa Kentaro Kono Ryoichi Ueno Yasuhiro Niwa Hiroaki Nitani Hitoshi Abe Satoru Takakusagi Masaharu Nomura Yasuhiro Iwasawa Kiyotaka Asakura

We measured the in situ polarization-dependent X-ray absorption fine structure of platinum nanoparticles (PtNPs) deposited on a flat highly oriented pyrolytic graphite (HOPG) substrate under electrochemical conditions using a back-side illumination method. In this method, the thin HOPG substrate with PtNPs deposited on one side was used as a window for incident and fluorescent X-rays, as well a...

Journal: :Journal of Electroanalytical Chemistry 1968

2016
D. Kraus A. Ravasio M. Gauthier D. O. Gericke J. Vorberger S. Frydrych J. Helfrich L. B. Fletcher G. Schaumann B. Nagler B. Barbrel B. Bachmann E. J. Gamboa S. Göde E. Granados G. Gregori H. J. Lee P. Neumayer W. Schumaker T. Döppner R. W. Falcone S. H. Glenzer M. Roth

The shock-induced transition from graphite to diamond has been of great scientific and technological interest since the discovery of microscopic diamonds in remnants of explosively driven graphite. Furthermore, shock synthesis of diamond and lonsdaleite, a speculative hexagonal carbon polymorph with unique hardness, is expected to happen during violent meteor impacts. Here, we show unprecedente...

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