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Citation: Wang Xue-Lin, Song Li-Guo, Li Guan-Bin, Tang Yuan-Feng, Xi Zheng-Kai. Study on Redution of Methylene Blue by Long Path-Length thin-Layer Spectroelectrochemistry[J]. Acta Physico-Chimica Sinica, ;1993, 9(01): 89-93. doi: 10.3866/PKU.WHXB19930115 shu

Study on Redution of Methylene Blue by Long Path-Length thin-Layer Spectroelectrochemistry

1.
Dept.of Applied Chemistry, Shandong Building Material University, Jinan 250022

Received Date: 17 September 1991
Available Online: 15 February 1993

The electrochemical roduction of methylene blue has been studied by long path-length thin-layer spectroelectrochemical method. It was found that the reduction of methylene blue at SnO_2 electrode is a two electron transfer reversible process. The standard potential E(?) determined was 0.286 V(vs. SCE). The acid dissociation constants for the leuco methylene blue were obtained as pK_(α1)=5.18, pK_(α1)=6.03. The mechanism of electrode reaction has been proposed.
- Long path-length thin-layer spectroelectrochemistry; Methylene blue; SnO₂-film glass electrode
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