scholarly journals Acetonitrile Adsorption on Pt Single-Crystal Electrodes and Its Effect on Oxygen Reduction Reaction in Acidic and Alkaline Aqueous Solutions

2019 ◽  
Vol 123 (4) ◽  
pp. 2300-2313 ◽  
Author(s):  
Valentín Briega-Martos ◽  
Marta Costa-Figueiredo ◽  
José M. Orts ◽  
Antonio Rodes ◽  
Marc T. M. Koper ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Oxygen Reduction Reaction ◽  
Single Crystal ◽  
Oxygen Reduction ◽  
Reduction Reaction

scholarly journals Effect of hydrophobic cations on the oxygen reduction reaction on single‒crystal platinum electrodes

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Tomoaki Kumeda ◽  
Hiroo Tajiri ◽  
Osami Sakata ◽  
Nagahiro Hoshi ◽  
Masashi Nakamura
Keyword(s):  
Oxygen Reduction Reaction ◽  
Single Crystal ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Platinum Electrodes

Glancing Angle Deposited Platinum Nanorod Arrays for Oxygen Reduction Reaction

2011 ◽  
Vol 1311 ◽  
Author(s):  
Wisam J. Khudhayer ◽  
Nancy Kariuki ◽  
Deborah Myers ◽  
Ali Shaikh ◽  
Tansel Karabacak
Keyword(s):  
Oxygen Reduction Reaction ◽  
Single Crystal ◽  
Oxygen Reduction ◽  
Surface Area ◽  
Reduction Reaction ◽  
Active Surface Area ◽  
Nanorod Arrays ◽  
Electrocatalytic Oxygen Reduction ◽  
Glancing Angle ◽  
Orr Activity

ABSTRACTIn this work, we investigated the electrocatalytic oxygen reduction reaction (ORR) activity of vertically aligned, single-layer, carbon-free, and single crystal Pt nanorod arrays utilizing cyclic voltammetry (CV) and rotating-disk electrode (RDE) techniques. A glancing angle deposition (GLAD) technique was used to fabricate 200 nm long Pt nanorods, which corresponds to Pt loading of 0.16 mg/cm2, on glassy carbon (GC) electrode at a glancing angle of 85° as measured from the substrate normal. An electrode comprised of conventional carbon-supported Pt nanoparticles (Pt/C) was also prepared for comparison with the electrocatalytic ORR activity and stability of Pt nanorods. CV results showed that the Pt nanorod electrocatalyst exhibits a more positive oxide reduction peak potential compared to Pt/C, indicating that GLAD Pt nanorods are less oxophilic. In addition, a series of CV cycles in acidic electrolyte revealed that Pt nanorods are significantly more stable against electrochemically-active surface area loss than Pt/C. Moreover, room temperature RDE results demonstrated that GLAD Pt nanorods exhibit higher area-specific ORR activity than Pt/C. The enhanced electrocatalytic ORR activity of Pt nanorods is attributed to their larger crystallite size, single-crystal property, and the dominance of (110) crystal planes on the large surface area nanorods sidewalls, which has been found to be the most active plane for ORR. However, the Pt nanorods showed lower mass specific activity than the Pt/C electrocatalyst due to the large diameter of the Pt nanorods.

Specific adsorption of perchlorate anions on Pt{hkl} single crystal electrodes

2014 ◽  
Vol 16 (27) ◽  
pp. 13689-13698 ◽  
Author(s):  
Gary A. Attard ◽  
Ashley Brew ◽  
Katherine Hunter ◽  
Jonathan Sharman ◽  
Edward Wright
Keyword(s):  
Oxygen Reduction Reaction ◽  
Single Crystal ◽  
Oxygen Reduction ◽  
Perchloric Acid ◽  
Reduction Reaction ◽  
Specific Adsorption ◽  
Anion Adsorption ◽  
Aqueous Perchloric Acid

Perchlorate anion adsorption inhibits the oxygen reduction reaction on Pt{hkl} electrodes in aqueous perchloric acid due to weak specific adsorption.

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