Imaging single-crystal surfaces

Imaging Single-Crystal Surfaces of Catalytically Relevant Systems... 

Figure 2.7. STM image (unfiltered) of a Pt single crystal surface consisting mainly of Pt( 111) terraces and covered by a Pt( 111)-(12x 12)-Na adlattice formed via electrochemical Na+ supply (from a P"-Al203 Na+ conductor interfaced with the Pt single crystal)3 36 on a Pt(l 1 l)-(2x2)-0 adlattice. Each sphere on the image corresponds to a Na atom.30,36 Reproduced from ref. 36 by permission of The Electrochemical Society.

In the following section, we focus on imaging single-crystal electrode surfaces that are of relevance to electrocatalysis. We will first deal with flat, defect-free terraces as well as with more real surfaces with monoatomic high steps as the most common active sites. We will then explore various strategies for nano structuring surfaces, for example, by repetitive oxidation-reduction cycles (ORCs). 

Preparation and Imaging of Metal Single-Crystal Surfaces... 

Fig. 11 FFM images of a rutile Ti02 (110) single crystal surface, (left) before UV-light irradiation, (right) after UV-light irradiation...

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