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Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media
CHEN Guobao *,YANG Hongying
School of Metallurgy, Northeastern University, Shenyang 110819
*Correspondence author
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Funding: National Natural Science Foundation of China (No.no. 51304047), Research Fund for the Doctoral Program of Higher Education of China (No.no. 20130042120040)
Opened online:25 March 2016
Accepted by: none
Citation: CHEN Guobao,YANG Hongying.Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media[OL]. [25 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681002
 
 
In the current study, rotating disk electrode (RDE) measurements were performed to gain insight into the oxygen reduction reaction (ORR) performance of the natural massive pyrite electrode in acidic media. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were also performed. The tafel slopes and electron transferred numbers were calculated according to the test results. The ORR process took place in the potential range of ?0.450 V to 0.050 V vs. AgCl/Ag. The average transferred electron number for ORR on pyrite in sulfuric acid was near to 2. The addition of ferric ion was shown to increase the dissolution rate of pyrite and the transferred electron numbers for ORR. At high concentration of ferric ion, the ORR process was inhibited attributing to a Fenton-like reaction mechanism and more intermediate H2O2 was produced accordingly.
Keywords:Hydrometallurgy;Oxygen reduction reaction; Pyrite; Rotating disc electrode
 
 
 

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