Review—Electroreduction of peroxodisulfate: A review of a complicated reaction
The electroreduction of peroxodisulfate has been studied on various electrode materials for decades. However, the reduction of peroxodisulfate is not fully understood to date. Many research groups have searched for an electrode material that exhibits a diffusion-controlled response in the electror...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/78070/ http://irep.iium.edu.my/78070/ http://irep.iium.edu.my/78070/ http://irep.iium.edu.my/78070/1/J.%20Electrochem.%20Soc.-2018-Shafiee-H785-98.pdf |
| Summary: | The electroreduction of peroxodisulfate has been studied on various electrode materials for decades. However, the reduction of
peroxodisulfate is not fully understood to date. Many research groups have searched for an electrode material that exhibits a
diffusion-controlled response in the electroreduction of peroxodisulfate. However, the voltammetric responses obtained on most
electrode materials have shown a kinetically-controlled reaction. Reaction mechanisms of peroxodisulfate reduction have also been
proposed by a few groups. This review paper focuses on the electrochemical responses for the reduction of peroxodisulfate obtained on
platinum, gold, platinized platinum, and bismuth-adsorbed platinum electrodes. This paper will not review the polarograms obtained
on mercury drop electrodes for the reduction of peroxodisulfate anions because we believe that the results do not contribute to the
understanding of the electrochemical reactions. We propose a simplified version of the reaction mechanisms. This paper also reviews
the kinetic models proposed by several groups which could assist the readers to apprehend the kinetic behaviors of peroxodisulfate
reduction. This paper discusses several issues related to peroxodisulfate from the natural decomposition of peroxodisulfate to the
reaction mechanisms of peroxodisulfate reduction |
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