Bending of polyelectrolyte membrane–platinum composite by electric stimuli III: self-oscillation

• Published in: Electrochimica acta Vol. 45; no. 27; pp. 4517 - 4523
• Main Authors: Asaka, Kinji, Oguro, Keisuke
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2000; Elsevier
• Subjects: Bending; Chemical plating; Chemistry; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Oscillation; Other electrodes; Oxidation; Solid polymer electrolyte; Bending; Oxidation; Chemical plating; Solid polymer electrolyte; Oscillation; Ionomer; Polymer solid electrolyte; Electrode electrolyte interface; Transition metal; Aldehyde; Experimental study; Formaldehyde; Composite material; Acidic solution; Sulfuric acid; Electrodes; Sodium Compounds; Platinum; Cation exchange membrane; Carboxylate; Formate; Aqueous solution; Electrochemical reaction; Electrode potential
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/S0013-4686(00)00507-7

Oscillatory bending responses of a solid polymer electrolyte membrane (SPM)–platinum (Pt) composite synchronized with anodic potential oscillations under galvanostatic conditions were determined. The oscillations took place when the anodic oxidations of formaldehyde or sodium formate in aqueous sulfuric acid solutions were carried out on a plated Pt electrode. The frequency and the waveform of the oscillations depended on the concentration of the organic compounds and the direct current applied. The phenomena are discussed in the light of a previously published model in which we proposed that the interfacial stress between the membrane and the electrolyte causes the bending response.