Electrocatalytic reduction of PhCH2Br on a Ag–Y zeolite modified electrode

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42663-42665 ◽  
Author(s):  
Huan Wang ◽  
Li He ◽  
Guo-Jiao Sui ◽  
Jia-Xing Lu
Keyword(s):  
Catalytic Activity ◽  
Electrochemical Reduction ◽  
Modified Electrode ◽  
Carbon Electrode ◽  
Electrocatalytic Reduction ◽  
Y Zeolite ◽  
Glass Carbon Electrode ◽  
Glass Carbon ◽  
Electrochemical Reduction And Carboxylation

A Ag-exchanged Y zeolite was prepared and modified on a glass carbon electrode, which displayed excellent catalytic activity towards electrochemical reduction and carboxylation of PhCH2Br.

Molybdenum Trioxide Dihydrate-Graphene Composite for Electrochemical Detection of Thiourea Molecule

NANO ◽  
2016 ◽  
Vol 11 (03) ◽  
pp. 1650036 ◽  
Author(s):  
Xinmeng Zhang ◽  
Kezhi Li ◽  
Hejun Li ◽  
Jinhua Lu ◽  
Leilei Zhang
Keyword(s):  
Electrochemical Sensor ◽  
Modified Electrode ◽  
Molybdenum Trioxide ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
X Ray ◽  
Glass Carbon Electrode ◽  
Graphene Composite ◽  
Relative Standard ◽  
Glass Carbon

A novel electrochemical sensing platform was constructed based on a facile self-assembly procedure synthetic laminar molybdenum trioxide dihydrate (MoO[Formula: see text]H2O)-graphene composite. Field emission scanning electron microscopy (FESEM), X-ray spectroscopy, X-ray diffraction (XRD) and Raman spectroscopy were employed to characterize the morphology and composition of the MoO[Formula: see text]H2O-graphene composite. As a model molecule, thiourea was utilized to investigate the electrochemical behaviors of the MoO[Formula: see text]H2O-graphene composite modified glass carbon electrode. The results show that the composite modified electrode has higher electron transfer rate than that of graphene modified electrode and bare glass carbon electrode meanwhile the peak currents of it has a good linear relationship with thiourea concentrations in the range of [Formula: see text] ([Formula: see text]) with detection limit of 4.99[Formula: see text][Formula: see text]M ([Formula: see text]). This novel electrochemical sensor exhibits a higher absorption capacity ([Formula: see text][Formula: see text]mol/cm2), a good reproducibility (1.41% relative standard deviation (RSD)), excellent anti-interference and a high stability. These excellent electrochemical properties of the MoO[Formula: see text]H2O-graphene composite are attributed to the loose and porous structure and the synergistic effects between graphene and MoO[Formula: see text]H2O, which make this composite material hold great potential applications for electrochemical sensor.

A High-Performance Bimetallic Pd-Cu Nanoparticles Membrane on Glassy Carbon Electrode for Formic Acid Oxidation

2013 ◽  
Vol 704 ◽  
pp. 264-269 ◽  
Author(s):  
Wei Wei ◽  
Yi Liu ◽  
Qi Jin Wan ◽  
Nian Jun Yang
Keyword(s):  
Formic Acid ◽  
Modified Electrode ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Carbon Electrode ◽  
Mixed Solution ◽  
Glass Carbon Electrode ◽  
Cu Content ◽  
Glass Carbon

The Palladium-copper nanoparticles (PdCu NPs) have been prepared by potentiostatic electrodeposition from a mixture electrolyte of H2PdCl4 and CuSO4,then placed the electrode in sulfuric acid using cyclic voltammetry sweep a few laps to fabricate the PdCu NPs/glass carbon electrode (Pd-Cu/GCE). The modified electrode electrochemical properties of a preliminary study found that this modified electrode has good stability and electrochemical activity, experiments show that formic aicd has good voltammetric response of the electrode. The electrical activity of the formic acid in the Pd/GCE is lower than that in the Pd-Cu/GCE, this is due to the synergistic effect of the bimetal. When the Cu content is increased gradually in H2PdCl4 and CuSO4 a mixed solution, the formic acid oxidation peak currentlower, because Cu has no electrocatalytic activity for formic acid oxidation.

Electrocatalytic Reduction of O2 and H2O2 at the Glass Carbon Electrode Modified with Microperoxidase-11

2000 ◽  
Vol 16 (06) ◽  
pp. 527-532 ◽  
Author(s):  
Yang Hui ◽  
◽  
Huang Zhi-Zhong ◽  
Jiang Hui-Jun ◽  
Zhou Jia-Hong ◽  
...  
Keyword(s):  
Carbon Electrode ◽  
Electrocatalytic Reduction ◽  
Glass Carbon Electrode ◽  
Glass Carbon

scholarly journals In-situ Polymerization of N-(3-aminobenzyl)-N, N-dimethyl-N-dodecyl Ammonium Bromide on Glassy Carbon Electrode for Estradiol Detection

2018 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Modified Electrode ◽  
Mixed Micelle ◽  
In Situ Polymerization ◽  
Endocrine Disrupting Chemicals ◽  
Ammonium Bromide ◽  
Carbon Electrode ◽  
Glass Carbon Electrode ◽  
Endocrine Disrupting ◽  
Glass Carbon

Estradiol is a common endocrine disrupting chemicals. Therefore, it is necessary to develop simple, sensitive and rapid methods for testosterone bioanalysis. In this work, poly (N-(3-aminobenzyl)-N,N-dimethyl-N-dodecyl ammonium bromide) (PAS), a novel cathodic organic electrochemiluminescence (ECL) emitter, was synthesized by in-situ polymerization of the corresponding monomer on glass carbon electrode. The PAS ECL system was constructed with the PAS modified electrode, and potassium persulfate (KPS) as oxidizing agent and co-reactant. It was applied to the ECL detection of estradiol. According to the results of fluorescence and dynamic light scattering (DLS), mixed micelle of PAS and estradiol was formed. The combination of PAS with estradiol intensified the fluorescence of the ECL system and enlarged the colloidal size. Hydrogen bonds and electrostatic interaction may play a role in the combination. The linearity for estradiol quantification is 6 pM to 1.5 nM with a LOD of 0. 1 pg/mL. The modified electrode can be easily renewed by washing with ethanol and water and the relative error in estradiol measurement does not exceed ± 7% in 7 time recycling. The detection of estradiol in urine sample qualified the ECL system with a recovery of 94.5 to 105% and the calculated coefficient of variation of 3.8%. This indicates that the PAS ECL system has the potential to detect estradiol in urine.

Novel Acetylcholinesterase Biosensor for Detection of Paraoxon Based on Holey Graphene Oxide Modified Glass Carbon Electrode

2018 ◽  
Vol 30 (10) ◽  
pp. 2258-2264 ◽  
Author(s):  
Yan Ping Li ◽  
Rui Xia Zhao ◽  
Gao Yi Han ◽  
Yao Ming Xiao
Keyword(s):  
Graphene Oxide ◽  
Carbon Electrode ◽  
Glass Carbon Electrode ◽  
Glass Carbon

Electrochemical Behaviour for Europium Doped Tantalum Oxide Coated Glass Carbon Electrode

2012 ◽  
Vol 518-523 ◽  
pp. 860-863
Author(s):  
Yan Hong Zhao ◽  
Chun Mei Zhang ◽  
Ting Liu ◽  
Qiang Qiang Du ◽  
Sheng Liang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electrochemical Reaction ◽  
Electrochemical Behaviour ◽  
Tantalum Oxide ◽  
Carbon Electrode ◽  
Film Electrode ◽  
Glass Carbon Electrode ◽  
Ta2o5 Film ◽  
Glass Carbon ◽  
Potential Applications

Europium doped tantalum oxide (europium-Ta2O5) particles were synthesized with a low temperature hydrothermal method. The electrochemical behaviour of an europium-Ta2O5 film electrode in 0.1 mol dm-3KCl solution containing 5 mmol dm-3K3Fe(CN)6was investigated using cyclic voltgrammetry (CV). The CV results indicated that the europium-Ta2O5film electrode exhibited good stable and reversible electrochemistry properties. The electrochemical reaction of K3Fe(CN)6was a diffusion-controlling process on the europium-Ta2O5film electrode. The europium-Ta2O5particles might have potential applications in electrochemical fields.

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