Premium
Generation of an electromotive force by hydrogen‐to‐water oxidation with Pt‐coated oxidized titanium foils
Author(s) -
Schierbaum Klaus,
El Achhab Mhamed
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127400
Subject(s) - electromotive force , titanium , materials science , anodizing , hydrogen , schottky diode , electrolyte , optoelectronics , hydrogen sensor , diode , analytical chemistry (journal) , aluminium , electrode , chemistry , composite material , electrical engineering , metallurgy , palladium , biochemistry , organic chemistry , chromatography , engineering , catalysis
We show that chemically induced current densities up to 20 mA cm −2 and an electromotive force (EMF) up to 465 mV are generated during the hydrogen‐to‐water‐oxidation over Pt/TiO 2 /Ti devices. We prepare the samples by plasma electrolytic oxidation (PEO) of titanium foils and deposition of Pt contact paste. This process yields porous structures and, depending on the anodization voltage, Schottky diode‐type current–voltage curves of various ideality parameters. Our experiments demonstrate that Pt coated anodized titanium can also be utilized as hydrogen sensor; the system offers a number of advantages such as a wide temperature range of operation from −40 to 80 °C, quick response and decay times of signals, and good electrical stability. Idealized sketch of the Pt coated anodized Ti foil and application as hydrogen sensor and electric generator.