Effect of Surface-to-Bulk Atomic Structure on Surface Electronic Structure in Multicomponent Catalysts Faisal M. Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
-2
I (A cm )
Atomic catalyst synthesis and characterization Au withlayer Increasingprecision Pt/Ni Replacements Layer by layer design of Catalyst surface: Near0.000006 Au Pt 1x = 0.33 No Pt surface compositional 0.000005 monolayers of 1x Pt deposited 3x 0.000004 architecture in catalyst systems 5x 0.000003 fundamentally shapes their Pt foil (scaled to match) 0.000002 properties. We designed Pt 0.000001 monolayer catalysts with 0.000000 atomic layer precision. -0.000001
At each stage we correlated -0.000002 the atomic and electronic -0.000003 structure to the catalytic -0.000004 -0.4 properties.
Pt growth
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Electrochemical Potential vs. Ag/AgCl (V)
The nature of the catalyst structure,
and consequently catalytic properties
its
change dramatically from sub-monolayer and 1 and 2 monolayers!
