Electrocatalytic activity of Au nanoparticles onto TiO2 nanotubular layers in oxygen electroreduction reaction: size and support effects

2016 ◽  
Vol 222 ◽  
pp. 1013-1020 ◽  
Author(s):  
Hanna Maltanava ◽  
Sergey Poznyak ◽  
Maksim Starykevich ◽  
Maria Ivanovskaya
Keyword(s):  
Electrocatalytic Activity ◽  
Au Nanoparticles ◽  
Oxygen Electroreduction ◽  
Support Effects ◽  
Oxygen Electroreduction Reaction

scholarly journals SYNTHESIS AND ELECTROCHEMICAL CHARACTERISTICS OF Fe (III)-ETIO PORPHYRIN II AND ITS 5,15-BIS(PYRID-3-YL) DERIVATIVE

2018 ◽  
Vol 61 (2) ◽  
pp. 29
Author(s):  
Nadezhda M. Berezina ◽  
Do Ngoc Minh ◽  
Mikhail I. Bazanov ◽  
Aleksandr S. Semeikin ◽  
Aleksandra A. Maksimova
Keyword(s):  
Electrocatalytic Activity ◽  
Metal Ion ◽  
Oxygen Electroreduction ◽  
Published Data ◽  
Electrochemical Characteristics ◽  
Central Metal ◽  
Experimental Conditions ◽  
Porphyrin Macrocycle ◽  
Half Wave ◽  
Oxygen Electroreduction Reaction

In this work acetato(3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato)iron(III) [(AcO)FeTMeTEtP] and acetato[5,15-bis(pyrid-3-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato)iron(III) [(OAc)OFe(Py-3)2TMeTEtP] have been synthesized and characterized. Electrochemical properties and electrocatalytic activity of complexes in oxygen electroreduction reaction in 0.1M KOH aqueous solution were studied by the cyclic voltammetry. The comparative analysis of the effect of complex formation, as well as functional substitution in the molecule (the introduction of one or two pyridyl fragments into meso-positions of the macrocycle) on the electrochemical parameters and activity of alkyl-substituted and pyridyl-substituted porphyrins in oxygen electroreduction reaction were carried out. The research of electrochemical behavior of complexes with close structure in experimental conditions has showed that a pyridyl substituent significantly affects the studied properties. The published data and obtained in our work have showed that (AcO)FeTMeTEtP and (AcO)Fe(Py-3)2TMeTEtP are characterized by redox processes involving both the porphyrin macrocycle (L ↔ Lˉ˙, Lˉ˙ ↔ L2ˉ), and metal (Fe3+ ↔ Fe2+, Fe2+ ↔ Fe+). It should be noted that the process of electroreduction of the central metal ion (Fe3+ ↔ Fe2+) proceeds under additional introduction of oxygen into the system for the (AcO)FeTMeTEtP, (Cl)Fe(Py-3)HMeDEtP and (AcO)Fe(Py-3)2TMeTEtP. The results of investigation of the electrocatalytic activity of tetrapyrrole compounds in an aqueous-alkaline medium allows one to make a conclusion about the positive effect of complexation and the introduction of electron-donor substitutes in the porphyrin macrocycle on the electroreduction process of molecular oxygen. The electrocatalytic activity of the studied compounds in the oxygen ionization reaction were increased, according to the decrease in the half-wave potential of O2 [E1/2(O2)] in the series: H2TMeTEtP < (AcO)FeTMeTEtP < (AcO)Fe(Py-3)2TMeTEtP.Forcitation:Berezina N.M., Do Ngoc Minh, Bazanov M.I., Semeikin A.S., Maksimova A.A. Synthesis and electrochemical characteristics of Fe (III) - etio porphyrin ii and its 5,15-bis(pyrid-3-yl) derivative. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 2. P. 29-34

Electrocatalytic activity of carbon-supported Pt–Au nanoparticles for methanol electro-oxidation

2007 ◽  
Vol 52 (18) ◽  
pp. 5599-5605 ◽  
Author(s):  
In-Su Park ◽  
Kug-Seung Lee ◽  
Dae-Sik Jung ◽  
Hee-Young Park ◽  
Yung-Eun Sung
Keyword(s):  
Electrocatalytic Activity ◽  
Au Nanoparticles ◽  
Electro Oxidation

Electrocatalytic Activity of Macroheterocyclic Complexes in the Molecular Oxygen Electroreduction: A Cyclic Voltammetry Estimate

2004 ◽  
Vol 40 (11) ◽  
pp. 1198-1204 ◽  
Author(s):  
M. I. Bazanov ◽  
A. V. Petrov ◽  
G. V. Zhutaeva ◽  
I. V. Turchaninova ◽  
G. Andrievski ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Molecular Oxygen ◽  
Electrocatalytic Activity ◽  
Oxygen Electroreduction

Enhancing the electrocatalytic activity and stability of Prussian blue analogues by increasing their electroactive sites through the introduction of Au nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Roger Sanchis-Gual ◽  
Toribio F. Otero ◽  
Marc Coronado Puchau ◽  
Eugenio Coronado
Keyword(s):  
Prussian Blue ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Au Nanoparticles ◽  
Alkaline Media ◽  
Prussian Blue Analogues ◽  
Earth Abundant

Prussian blue analogues (PBAs) have been proven as excellent earth‐abundant electrocatalysts for the oxygen evolution reaction (OER) in acidic, neutral and alkaline media. Still, further improvements can be achieved by...

Enhanced electrocatalytic activity of gold nanoparticles on hydroxyapatite nanorods for sensitive hydrazine sensors

2016 ◽  
Vol 4 (17) ◽  
pp. 6385-6394 ◽  
Author(s):  
G. Bharath ◽  
Alberto Naldoni ◽  
K. Hasini Ramsait ◽  
Ahmed Abdel-Wahab ◽  
Rajesh Madhu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electrocatalytic Activity ◽  
Au Nanoparticles ◽  
Hydrazine Oxidation ◽  
Catalytic Sites

With the synthesized Au/hydroxyapatite (HAp) nanocomposites, the HAp nanorods favored adsorption of hydrazine, thus bringing hydrazine closer to the catalytic sites of Au nanoparticles and increasing the efficiency of hydrazine oxidation.

scholarly journals Comparison of electrocatalytic activity for glucose electrooxidation of gold nanoparticles fabricated by different methods

Chemija ◽  
2019 ◽  
Vol 30 (1) ◽  
Author(s):  
Daina Upskuvienė ◽  
Aldona Balčiūnaitė ◽  
Jūratė Vaičiūnienė ◽  
Algirdas Selskis ◽  
Rimantas Vaitkus ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electrocatalytic Activity ◽  
Au Nanoparticles ◽  
Carbon Support ◽  
Alkaline Media ◽  
Carbon Powder ◽  
Microwave Assisted Synthesis ◽  
One Pot ◽  
Microwave Assisted ◽  
Glucose Electrooxidation

In this study, the gold nanoparticles (AuNPs) without carbon support were prepared using the well-known citrate reduction method. The carbon supported AuNPs nanocomposites were fabricated by two different approaches: chemical adsorption of AuNPs from the prepared citrate stabilized AuNP colloidal solution on the carbon powder surface and one-pot microwave-assisted synthesis. The nanocomposites were characterized using scanning electron microscopy (SEM) and inductively coupled plasma optical emission spectroscopy (ICP-OES). The electrocatalytic activity of the prepared catalysts was evaluated for the electrooxidation of glucose in an alkaline media using cyclic voltammetry. The highest electrocatalytic activity was observed for the catalyst of carbon supported Au nanoparticles prepared by microwave-assisted synthesis, followed by the catalyst of carbon supported Au nanoparticles prepared by means of the adsorption method, whereas the pure Au nanoparticles without carbon support exhibited the lowest electrocatalytic properties for glucose electrooxidation.

Carbon Nanotubes Modified with Oxygen- and Nitrogen-Containing Groups as Perspective Catalysts for the Oxygen Electroreduction Reaction

2020 ◽  
Vol 56 (10) ◽  
pp. 809-820
Author(s):  
V. A. Bogdanovskaya ◽  
M. V. Radina ◽  
O. V. Korchagin ◽  
N. A. Kapustina ◽  
L. P. Kazanskii
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Electroreduction ◽  
Oxygen Electroreduction Reaction
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