Semiconductor Electrodes. LVII.--Differential Photocurrent and Second Harmonic Techniques for In Situ Monitoring of Surface States on n-MoSe sub 2 in Aqueous Solutions

Second harmonic a.c. impedance and differential photocurrent techniques are employed to monitor, in situ , the surface states on n-MoSe sub 2 electrodes in aqueous solutions containing the Fe(CN) exp 3_/4_ sub 6 couple. These two techniques are qualitatively more sensitive to the presence of surface...

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Published inJournal of the Electrochemical Society Vol. 131; no. 10; pp. 2289 - 2294
Main Authors Wheeler, B L, Nagasubramanian, G, Bard, A J
Format Journal Article
LanguageEnglish
Published 01.10.1984
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Summary:Second harmonic a.c. impedance and differential photocurrent techniques are employed to monitor, in situ , the surface states on n-MoSe sub 2 electrodes in aqueous solutions containing the Fe(CN) exp 3_/4_ sub 6 couple. These two techniques are qualitatively more sensitive to the presence of surface states on single-crystal n-MoSe sub 2 than first harmonic a.c. techniques. Surface states on this semiconductor electrode were passivated by a thin layer of RuO sub x . This film also increased the PEC efficiency of both single-crystal and polycrystalline n-MoSe sub 2 . 32 ref.--AA
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ISSN:0013-4651