2011
DOI: 10.1021/ac201118t
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Nafion-Coating of the Electrodes Improves the Flow-Stability of the Ag/SiO2/Ag2O Electroosmotic Pump

Abstract: When a current or a voltage is applied across the ceramic membrane of the nongassing Ag/Ag(2)O-SiO(2)-Ag/Ag(2)O pump, protons produced in the anodic reaction 2Ag(s) + H(2)O → Ag(2)O(s) + 2H(+) + 2e(-) are driven to the cathode, where they are consumed by the reaction Ag(2)O(s) + H(2)O + 2e(-) → 2Ag(s) + 2 OH(-). The flow of water is induced by momentum transfer from the electric field-driven proton-sheet at the surface of the ceramic membrane. About 10(4) water molecules flowed per reacted electron. Because di… Show more

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Cited by 20 publications
(22 citation statements)
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“…7 The development of non-gassing electrode materials for EOPs is the focus of our research group. [8][9][10][11] The use of non-gassing electrode materials in EOPs was initially demonstrated by Luft, Kuhl, and Richter in 1977. [12][13][14] Later, others [12][13][14] used Ag/AgCl electrodes, wherein consumable silver acted as an anode and AgCl as a cathode.…”
mentioning
confidence: 99%
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“…7 The development of non-gassing electrode materials for EOPs is the focus of our research group. [8][9][10][11] The use of non-gassing electrode materials in EOPs was initially demonstrated by Luft, Kuhl, and Richter in 1977. [12][13][14] Later, others [12][13][14] used Ag/AgCl electrodes, wherein consumable silver acted as an anode and AgCl as a cathode.…”
mentioning
confidence: 99%
“…The use of the redox polymer, poly (3,4-ethylenedioxythiophene), as an electrode material has been previously reported. 15 In our earlier study [8][9][10][11] we described the most efficient non-gassing EOPs employing a Ag/Ag 2 O electrode, wherein Ag was electro-oxidized to Ag 2 O at the anode while the protons thus generated drifted to the cathode. However, at the cathode, Ag 2 O was electro-reduced to Ag, with net generation of water molecules.…”
mentioning
confidence: 99%
“…The Ag 2 O solid‐state cathode has a very high standard potential E ° of +1.17 V (Equation ) close to that of oxygen (+1.229 V, Equation ), while it minimizes issues of the air‐cathode including low reactant collision probability and low aqueous oxygen solubility . The electrons and protons generated by the bacterial respiration move to the cathode reducing Ag 2 O to Ag.…”
Section: Resultsmentioning
confidence: 99%
“…However, because of the use of an additional device, the size of all equipment required including the EOP itself becomes inevitably large. To solve these problems caused through the use of a Pt electrode, we focused on the reactions occurring in the electrode and reported an EOP using electrodes of Ag/Ag 2 O and PANI-PSS [1]. An EOP using the above materials as an electrode does not generate any gas owing to the electrolysis of water and can be powered by a battery because it can be driven at a low voltage.…”
Section: Introductionmentioning
confidence: 99%