Small Gold Nanoparticles Interfaced to Electrodes through Molecular Linkers: A Platform to Enhance Electron Transfer and Increase Electrochemically Active Surface Area

2016 ◽  
Vol 138 (42) ◽  
pp. 13975-13984 ◽  
Author(s):  
Samantha L. Young ◽  
Jaclyn E. Kellon ◽  
James E. Hutchison
Keyword(s):  
Gold Nanoparticles ◽  
Electron Transfer ◽  
Surface Area ◽  
Active Surface ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

scholarly journals The electrochemical properties of carbon nanotubes and carbon XC-72R and their application as Pt supports§

2010 ◽  
Vol 75 (10) ◽  
pp. 1435-1439 ◽  
Author(s):  
Maja Obradovic
Keyword(s):  
Carbon Nanotubes ◽  
Electron Transfer ◽  
Electrochemical Properties ◽  
Surface Area ◽  
Carbon Materials ◽  
Active Surface ◽  
Active Surface Area ◽  
Electron Transfer Kinetics ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

The results of an investigation of two samples of commercial multi-walled carbon nanotubes and a sample of carbon black, in the raw and activated state, were presented in the lecture. The activation of the carbon materials led to the formation of an abundance of oxygencontaining functional groups on the surface, an increased electrochemically active surface area, an enhanced charge storage ability and a promotion of the electron-transfer kinetics. It was presented that the morphology of the carbon nanotubes is important for the electrochemical properties, because nanotubes with a higher proportion of edge and defect sites showed faster electron transfer and pseudocapacitive redox kinetics. Modification of oxidized nanotubes by ethylenediamine and wrapping by poly(diallyldimethylammonium) chloride led to a decrease in the electrochemically active surface area and to reduced electron-transfer kinetics. Pt nanoparticles prepared by the microwave-assisted polyol method were deposited at the investigated carbon materials. A much higher efficiency of Pt deposition was observed on the modified CNTs than on the activated CNTs. The activity of the synthesized catalyst toward electrochemical oxygen reduction was almost the same as the activity of the commercial Pt/XC-72 catalyst.

Microstructure and electrochemically active surface area of PtM/C electrocatalysts

2011 ◽  
Vol 47 (8) ◽  
pp. 933-939 ◽  
Author(s):  
V. E. Guterman ◽  
S. V. Belenov ◽  
T. A. Lastovina ◽  
E. P. Fokina ◽  
N. V. Prutsakova ◽  
...  
Keyword(s):  
Surface Area ◽  
Active Surface ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

scholarly journals The effect of the composition of the dispersing medium of oxide sols on the electrocatalytic activity of sol-gel obtained RuO2-TiO2/Ti anodes

2001 ◽  
Vol 66 (11-12) ◽  
pp. 847-857 ◽  
Author(s):  
Dejan Mitrovic ◽  
Vladimir Panic ◽  
Aleksandar Dekanski ◽  
Slobodan Milonjic ◽  
Radoslav Atanasoski ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrocatalytic Activity ◽  
Sol Gel ◽  
Active Surface ◽  
Proton Exchange ◽  
Alcohol Molecule ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Dispersing Medium ◽  
Electrochemically Active Surface

The influence of the addition of methanol, ethanol, 1-propanol and 2-propanol to the dispersing medium of amixture of RuO2 and TiO2 sols on the electrochemically active surface area for proton exchange, as well as on the electrocatalytic activity for the chlorine evolution reaction (CER) of RuO2-TiO2/Ti electrode obtained by sol-gel procedure was investigated. The electrochemically active surface area was examined by cyclic voltammetry, while the analysis of the activity for the CER was performed by polarization measurements. The stability of the obtained anode coatings was also checked by an accelerated stability test. The anode properties depend on the number of C atoms in the alcohol molecule, as well as on the elapsed time between the preparation of the sols/alcohol mixture and its application onto the titanium support. The addition of alcohol increased the activity of the anodes for the CER, compared to those prepared without the addition, but their stability was smaller.

scholarly journals Evaluation of the Electrochemically Active Surface Area of Microelectrodes by Capacitive and Faradaic Currents

2019 ◽  
Vol 6 (17) ◽  
pp. 4411-4417 ◽  
Author(s):  
Alina N. Sekretaryova ◽  
Mikhail Yu. Vagin ◽  
Anton V. Volkov ◽  
Igor V. Zozoulenko ◽  
Mats Eriksson
Keyword(s):  
Surface Area ◽  
Active Surface ◽  
Active Surface Area ◽  
Electrochemically Active ◽  
Electrochemically Active Surface

scholarly journals PtCo-excavated rhombic dodecahedral nanocrystals for efficient electrocatalysis

2020 ◽  
Vol 2 (10) ◽  
pp. 4881-4886
Author(s):  
Cong Shen ◽  
Xuemin Li ◽  
Yajing Wei ◽  
Zhenming Cao ◽  
Huiqi Li ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxidation Reaction ◽  
Chemical Method ◽  
Active Surface ◽  
Methanol Oxidation Reaction ◽  
Active Surface Area ◽  
Wet Chemical Method ◽  
Electrochemically Active ◽  
Wet Chemical ◽  
Electrochemically Active Surface

We successfully synthesized excavated rhombic dodecahedral PtCo NCs using a wet chemical method. This structure and the alloy nature render the PtCo ERD NCs a large electrochemically active surface area and an excellent catalyst for OER and the methanol oxidation reaction.

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