Abstract
Combined reflectance, electrochemical quartz crystal microbalance, and conventional voltammetric measurements on high-area titanium dioxide electrodes in dry, electrolyte-containing solutions of acetonitrile show that electron accumulation layer formation is coupled directly to intercalation (e.g., Li+ or Na+) or to reversible adsorption (tetrabutylammonium ion) of charge compensating cations. Difficulty in achieving intercalation with these ions appears to account for the extreme negative shift of the flatband potential in acetonitrile, in comparison to aqueous solutions. More generally, the charge compensation based adsorption/intercalation phenomenon appears to play a key role in defining the conduction band edge energetics of titanium dioxide (and presumably other metal oxides) in solution environments.
| Original language | English |
|---|---|
| Pages (from-to) | 15718-15720 |
| Number of pages | 3 |
| Journal | Journal of Physical Chemistry |
| Volume | 99 |
| Issue number | 43 |
| Publication status | Published - 1995 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Energetics of semiconductor electrode/solution interfaces : EQCM evidence for charge-compensating cation adsorption and intercalation during accumulation layer formation in the titanium dioxide/acetonitrile system. / Lyon, L. Andrew; Hupp, Joseph T.
In: Journal of Physical Chemistry, Vol. 99, No. 43, 1995, p. 15718-15720.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Energetics of semiconductor electrode/solution interfaces
T2 - EQCM evidence for charge-compensating cation adsorption and intercalation during accumulation layer formation in the titanium dioxide/acetonitrile system
AU - Lyon, L. Andrew
AU - Hupp, Joseph T
PY - 1995
Y1 - 1995
N2 - Combined reflectance, electrochemical quartz crystal microbalance, and conventional voltammetric measurements on high-area titanium dioxide electrodes in dry, electrolyte-containing solutions of acetonitrile show that electron accumulation layer formation is coupled directly to intercalation (e.g., Li+ or Na+) or to reversible adsorption (tetrabutylammonium ion) of charge compensating cations. Difficulty in achieving intercalation with these ions appears to account for the extreme negative shift of the flatband potential in acetonitrile, in comparison to aqueous solutions. More generally, the charge compensation based adsorption/intercalation phenomenon appears to play a key role in defining the conduction band edge energetics of titanium dioxide (and presumably other metal oxides) in solution environments.
AB - Combined reflectance, electrochemical quartz crystal microbalance, and conventional voltammetric measurements on high-area titanium dioxide electrodes in dry, electrolyte-containing solutions of acetonitrile show that electron accumulation layer formation is coupled directly to intercalation (e.g., Li+ or Na+) or to reversible adsorption (tetrabutylammonium ion) of charge compensating cations. Difficulty in achieving intercalation with these ions appears to account for the extreme negative shift of the flatband potential in acetonitrile, in comparison to aqueous solutions. More generally, the charge compensation based adsorption/intercalation phenomenon appears to play a key role in defining the conduction band edge energetics of titanium dioxide (and presumably other metal oxides) in solution environments.
UR - http://www.scopus.com/inward/record.url?scp=0000079390&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000079390&partnerID=8YFLogxK
M3 - Article
VL - 99
SP - 15718
EP - 15720
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 43
ER -