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On the origin of metal film work function changes under electrochemical modification

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
425
Issue
1
Identifiers
DOI: 10.1016/s0039-6028(99)00253-8
Keywords
  • Catalysis
  • Surface Electronic Phenomena
Disciplines
  • Chemistry

Abstract

Abstract The catalytic activity and selectivity of metals can be reversibly altered by supplying promoters electrochemically. This has been achieved by using a catalyst as the working electrode in a solid electrolyte electrochemical cell. In this letter we review the accepted explanation for the relationship between the catalyst work function ( eφ W) and the potential difference between the working and reference electrodes of the electrochemical cell ( V WR). We show that this explanation is not correct. A theoretical derivation for the relationship found between eφ W and V WR in some experiments is not presently available. For the moment, it must be considered only an experimental finding.

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