Fig. 6: Model of the CuZn/Cu(111) surface in H2/CO2 and in H2/CO2/CO.
From: Visualizing the gas-sensitive structure of the CuZn surface in methanol synthesis catalysis
(Zn: gray, Cu: orange, O: dark red) (A) atom-resolved NAP-STM image acquired of the CuZn/Cu(111) surface during the 10 mbar (2:1) H2/CO2 gas exposure. The structural state of the surface is represented in the ball model illustrating the stable CuZn alloy phase. (B) Representative atom-resolved UHV-STM image of the Znad/Cu(111) interface region, showing the substitutionally alloyed Zn atoms near the edge of the Znad structure. The ball model illustrates the dynamic Znad-Ox/CuZn/Cu(111) interface region emerging in H2/CO2/CO, arrows indicate the Zn alloying occurring in the Znad-Ox/CuZn/Cu(111) interface region and the ongoing supply of the Znad-Ox clusters.
