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Title: Indirect (hydrogen-driven) electrodeposition of porous silver onto a palladium membrane
Authors: Tinakorn Kanyanee
Philip J. Fletcher
Elena Madrid
Frank Marken
Keywords: Chemistry
Materials Science
Physics and Astronomy
Issue Date: 1-Jan-2020
Abstract: © 2020, The Author(s). Hydrogen permeation through a pure palladium film (25 μm thickness, optically dense) is employed to trigger electron transfer (hydrogen-driven) reactions at the external palladium | aqueous electrolyte interface of a two-compartment electrochemical cell. Two systems are investigated to demonstrate feasibility for (i) indirect hydrogen-mediated silver electrodeposition with externally applied potential and (ii) indirect hydrogen-mediated silver electrodeposition driven by external formic acid decomposition. In both cases, porous metal deposits form as observed by optical and electron microscopies. Processes are self-limited as metal deposition blocks the palladium surface and thereby slows down further hydrogen permeation. The proposed methods could be employed for a wider range of metals, and they could provide an alternative (non-electrochemical or indirect) procedure for metal removal or metal recovery processes or for indirect metal sensing. [Figure not available: see fulltext.].
ISSN: 14330768
Appears in Collections:CMUL: Journal Articles

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