A rotating disk electrode study of the particle size effects of Pt for the hydrogen oxidation reaction

2012 ◽  
Vol 14 (7) ◽  
pp. 2278 ◽  
Author(s):  
Yu Sun ◽  
Yu Dai ◽  
Yuwen Liu ◽  
Shengli Chen
Keyword(s):  
Particle Size ◽  
Size Effects ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Hydrogen Oxidation Reaction ◽  
Particle Size Effects

scholarly journals Rapid electrochemical detection of Escherichia coli using nickel oxidation reaction on a rotating disk electrode

2021 ◽  
Vol 411 ◽  
pp. 128453
Author(s):  
Ashwin Ramanujam ◽  
Bertrand Neyhouse ◽  
Rebecca A. Keogh ◽  
Madhivanan Muthuvel ◽  
Ronan K. Carroll ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Electrochemical Detection ◽  
Oxidation Reaction ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Nickel Oxidation

Chemical and electrochemical oxidation of phenothiazine

1993 ◽  
Vol 71 (5) ◽  
pp. 674-677 ◽  
Author(s):  
Alexei N. Pankratov ◽  
Inna M. Uchaeva ◽  
Alexander N. Stepanov
Keyword(s):  
Electrochemical Oxidation ◽  
Sulphuric Acid ◽  
Quantum Chemical ◽  
Oxidation Reaction ◽  
Cation Radical ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Diffusion Controlled ◽  
Voltammetric Technique

The oxidation of phenothiazine in dilute solutions of sulphuric acid leads to the corresponding cation radical. Using a potentiometric technique, a pKa value of 5.72 ± 0.05 was determined for phenothiazine. The kinetics has been studied and participation of both protonated and unprotonated oxidant in the oxidation reaction has been confirmed. Using a voltammetric technique with a rotating disk electrode, the anodic oxidation of phenothiazine was shown to be a one-electron diffusion-controlled process. A quantum chemical explanation was found for the direction of phenothiazine protonation and the absence of a dimerization stage of oxidation.

Benchmarking Pt-based electrocatalysts for low temperature fuel cell reactions with the rotating disk electrode: oxygen reduction and hydrogen oxidation in the presence of CO (review article)

2015 ◽  
Vol 179 ◽  
pp. 647-657 ◽  
Author(s):  
Christoffer M. Pedersen ◽  
María Escudero-Escribano ◽  
Amado Velázquez-Palenzuela ◽  
Leif H. Christensen ◽  
Ib Chorkendorff ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Low Temperature ◽  
Oxygen Reduction ◽  
Hydrogen Oxidation ◽  
Rotating Disk ◽  
Review Article ◽  
Rotating Disk Electrode ◽  
Disk Electrode

scholarly journals A highly-active, stable and low-cost platinum-free anode catalyst based on RuNi for hydroxide exchange membrane fuel cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yanrong Xue ◽  
Lin Shi ◽  
Xuerui Liu ◽  
Jinjie Fang ◽  
Xingdong Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Low Cost ◽  
Rotating Disk ◽  
Membrane Electrode ◽  
Anode Catalyst ◽  
Hydrogen Binding ◽  
Hydrogen Oxidation Reaction ◽  
Exchange Membrane

Abstract The development of cost-effective hydroxide exchange membrane fuel cells is limited by the lack of high-performance and low-cost anode hydrogen oxidation reaction catalysts. Here we report a Pt-free catalyst Ru7Ni3/C, which exhibits excellent hydrogen oxidation reaction activity in both rotating disk electrode and membrane electrode assembly measurements. The hydrogen oxidation reaction mass activity and specific activity of Ru7Ni3/C, as measured in rotating disk experiments, is about 21 and 25 times that of Pt/C, and 3 and 5 times that of PtRu/C, respectively. The hydroxide exchange membrane fuel cell with Ru7Ni3/C anode can deliver a high peak power density of 2.03 W cm−2 in H2/O2 and 1.23 W cm−2 in H2/air (CO2-free) at 95 °C, surpassing that using PtRu/C anode catalyst, and good durability with less than 5% voltage loss over 100 h of operation. The weakened hydrogen binding of Ru by alloying with Ni and enhanced water adsorption by the presence of surface Ni oxides lead to the high hydrogen oxidation reaction activity of Ru7Ni3/C. By using the Ru7Ni3/C catalyst, the anode cost can be reduced by 85% of the current state-of-the-art PtRu/C, making it highly promising in economical hydroxide exchange membrane fuel cells.

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