Effect of cobalt bis(dicarbollides) on electrochemical oxygen reduction on Pt electrode in methanol–acid solution

2006 ◽  
Vol 51 (7) ◽  
pp. 1225-1234 ◽  
Author(s):  
Hidenobu Shiroishi ◽  
Yusuke Ayato ◽  
Jiří Rais ◽  
Keiji Kunimatsu ◽  
Masatoshi Osawa ◽  
...  
Keyword(s):  
Acid Solution ◽  
Oxygen Reduction ◽  
Pt Electrode ◽  
Electrochemical Oxygen

scholarly journals Mixed Lithium and Sodium Ion Aprotic DMSO Electrolytes for Oxygen Reduction on Au and Pt Studied by DEMS and RRDE

2021 ◽  
Author(s):  
M. Hegemann ◽  
P. P. Bawol ◽  
A. Köllisch-Mirbach ◽  
H. Baltruschat
Keyword(s):  
Oxygen Reduction ◽  
Product Distribution ◽  
Reduction Reaction ◽  
Mixed Electrolytes ◽  
Peroxide Formation ◽  
Pt Electrode ◽  
Rate Determining Step ◽  
Differential Electrochemical Mass Spectrometry ◽  
Redox Couples ◽  
Pt Electrodes

AbstractIn order to advance the development of metal-air batteries and solve possible problems, it is necessary to gain a fundamental understanding of the underlying reaction mechanisms. In this study we investigate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER, from species formed during ORR) in Na+ containing dimethyl sulfoxide (DMSO) on poly and single crystalline Pt and Au electrodes. Using a rotating ring disk electrode (RRDE) generator collector setup and additional differential electrochemical mass spectrometry (DEMS), we investigate the ORR mechanism and product distribution. We found that the formation of adsorbed Na2O2, which inhibits further oxygen reduction, is kinetically favored on Pt overadsorption on Au. Peroxide formation occurs to a smaller extent on the single crystal electrodes of Pt than on the polycrystalline surface. Utilizing two different approaches, we were able to calculate the heterogeneous rate constants of the O2/O2− redox couple on Pt and Au and found a higher rate for Pt electrodes compared to Au. We will show that on both electrodes the first electron transfer (formation of superoxide) is the rate-determining step in the reaction mechanism. Small amounts of added Li+ in the electrolyte reduce the reversibility of the O2/O2− redox couples due to faster and more efficient blocking of the electrode by peroxide. Another effect is the positive potential shift of the peroxide formation on both electrodes. The reaction rate of the peroxide formation on the Au electrode increases when increasing the Li+ content in the electrolyte, whereas it remains unaffected on the Pt electrode. However, we can show that the mixed electrolytes promote the activity of peroxide oxidation on the Pt electrode compared to a pure Li+ electrolyte. Overall, we found that the addition of Li+ leads to a Li+-dominated mechanism (ORR onset and product distribution) as soon as the Li+ concentration exceeds the oxygen concentration. Graphical abstract

General Strategy for Synthesis of Pd3 M (M = Co and Ni) Nanoassemblies as High-Performance Catalysts for Electrochemical Oxygen Reduction

2017 ◽  
Vol 5 (3) ◽  
pp. 1701015 ◽  
Author(s):  
Yifan Chen ◽  
Xian Jiang ◽  
Yueyang Li ◽  
Pei Li ◽  
Qicheng Liu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
High Performance ◽  
General Strategy ◽  
Electrochemical Oxygen

The electrochemical oxygen reduction on the graphite electrode

1983 ◽  
Vol 28 (5) ◽  
pp. 685-690 ◽  
Author(s):  
B. Lovreček ◽  
M. Batinic ◽  
J. Čaja
Keyword(s):  
Oxygen Reduction ◽  
Graphite Electrode ◽  
Electrochemical Oxygen

scholarly journals Electrochemical oxygen reduction catalysed by Ni3(hexaiminotriphenylene)2

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Elise M. Miner ◽  
Tomohiro Fukushima ◽  
Dennis Sheberla ◽  
Lei Sun ◽  
Yogesh Surendranath ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Electrochemical Oxygen

Mechanism of Electrochemical Oxygen Reduction Reaction at Two-Dimensional Pt-doped MoSe2 Material: An Efficient Electrocatalyst

2021 ◽  
Author(s):  
Shrish Nath Upadhyay ◽  
Srimanta Pakhira
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Clean Energy ◽  
Reduction Reaction ◽  
Electrochemical Reactions ◽  
Two Dimensional ◽  
O2 Reduction ◽  
Energy Conversion Systems ◽  
Electrochemical Oxygen

The O2 reduction reaction (ORR) is one promising reaction in clean energy conversion systems such as fuel cells, metal-air batteries, electrochemical reactions, etc. Pt shows excellent electrocatalytic activities for ORR,...

Alloy Nanocatalysts for the Electrochemical Oxygen Reduction (ORR) and the Direct Electrochemical Carbon Dioxide Reduction Reaction (CO 2 RR)

2018 ◽  
Vol 31 (31) ◽  
pp. 1805617 ◽  
Author(s):  
Cheonghee Kim ◽  
Fabio Dionigi ◽  
Vera Beermann ◽  
Xingli Wang ◽  
Tim Möller ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Electrochemical Oxygen
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