Salt-free electrolysis of water facilitated by hydrogen gas in thin layer cell

Li, Chunyan; Aoki, Koichi; Chen, Jingyuan; Nishiumi, Toyohiko

doi:10.2147/rie.s47741

RIE

2013

DOI: 10.2147/rie.s47741

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Salt-free electrolysis of water facilitated by hydrogen gas in thin layer cell

Chunyan Li¹,

Koichi Aoki²,

Jingyuan Chen³

et al.

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Cited by 2 publications

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“…This elevation increases the currents caused by the redox cycling between neighboring elevated parts, 32,[41][42][43][44] such as the redox cycling currents in a thin layer cell. [45][46][47] The elevation height can be increased only by the deposition of electrode materials over a long period. Unfortunately, no e Present address: Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai, Miyagi 980-8578, Japan.…”

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Enhancement of Redox Cycling Currents at Interdigitated Electrodes with Elevated Fingers

Morita¹,

Hayashi²,

Horiuchi³

et al. 2014

J. Electrochem. Soc.

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An ideal interdigitated array (IDA) electrode is composed of a pair of comb-type finger electrodes flush with an insulating wall. However, the fingers that compose an actual IDA are elevated from the gap plane by their thickness. The side wall of the elevated part can work as an active electrode, and increases the current for redox cycling reactions, as in a thin layer cell. Here, the elevated fingers are deliberately fabricated to increase the redox cycling currents. Our fabrication technique involves combining the carbonization of thick polyimide films with photolithography on quartz substrates. One type of fabricated electrode has an elevated height ranging from 0.01 to 4.5 μm for a 5 μm gap. The other type has a height of 0.05 μm for gaps ranging from 0.25 to 2 μm. The theoretical current is evaluated by solving numerically the Laplace equation for the redox concentration by using the finite element method. An approximate equation for diffusion controlled currents is obtained based on the concept that the current is the sum of the current at the flat IDA and that at the area of the electrode side wall. Voltammograms of ferrocene derivatives demonstrate the validity of the approximate equation for the enhancement of the current

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confidence: 99%

Enhancement of Redox Cycling Currents at Interdigitated Electrodes with Elevated Fingers

Morita¹,

Hayashi²,

Horiuchi³

et al. 2014

J. Electrochem. Soc.

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Electrochemical Production of Hydrogen in Fermented Flour by Stainless Steel Electrode

2020

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Hydrogen gas production with an electrochemical method requires more energy. This research aimed to determine the efficiency of the electrolysis process in product and energy consumptions using stainless steel as a working electrode and various concentration of the fermented flour as the media. The fermented flour was prepared by fermentation of Manihot utilissima with Monascus sp. and characterized by infrared spectroscopy. The stainless steel was characterized by voltammetry, SEM-EDX, XRD and gas sorption analyzer. The results showed that stainless steel activity was decreased in the fermented flour because the surface of stainless steel was being covered. Moreover, addition of 0-2 g/L water fermented flour had relatively similar stainless steel activity. The cathodic current peaks were at -4.86 × 10-4 and -4.87 × 10-4 mA, respectively, for 0 and 2 g/L media. The processes had consumed the same energy with -0.0996 V of cathodic peak potential.

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Salt-free electrolysis of water facilitated by hydrogen gas in thin layer cell

Cited by 2 publications

References 41 publications

Enhancement of Redox Cycling Currents at Interdigitated Electrodes with Elevated Fingers

Enhancement of Redox Cycling Currents at Interdigitated Electrodes with Elevated Fingers

Electrochemical Production of Hydrogen in Fermented Flour by Stainless Steel Electrode

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