Complex reactions on a convertible catalyst surface: A study of the S-O-Cu system

TLDR: In this paper, the interaction of clean and partially oxidized Cu(110) with sulphur was studied by scanning tunneling microscopy and density functional theory calculations in the low-coverage range.

About: This article is published in Surface Science.The article was published on 2018-12-01 and is currently open access. It has received 3 citations till now.

Figures

Figure 4: Back-to-back recorded images show an entire 001 nanowire flipping

Figure 2: A: Sulphur adsorption on 0.2 ML O(21)-Cu(110) (Exposure approx. 61012 atoms/cm2). The dark stripes are the surface oxide stress domains, bright patches and lines appear upon S adsorption (140140 nm²; Ubias: -500 mV, It: 70 pA). B: High-resolution image of a similar preparation as in A (12.314.9 nm²; Ubias: 300 mV, It: 100 pA).

Figure 5: A: High-resolution image of a typical 110 chain. The chain periodicity is 255 pm. Note the asymmetric shape of the building blocks and the mirror symmetry

Figure 6: A: Nanowire structure in [001] direction formed after S exposure on a (2×1)O-Cu(110) stripe. (1820 nm²; Ubias: 300 mV, It: 200 pA) B: A different type of [001] nanowire, where no internal structure could be resolved. (3.84.3 nm²; Ubias: -250 mV, It: 50 pA). C: Profile of the nanowire shown in A.

Figure 3: A: S on 0.2 ML O(21)-Cu(110) similar to Figure 2A, but after annealing to 373 K (112112 nm²; Ubias= -50 mV, It: 70 pA). B: High-resolution image as in A,

Figure 1: A: Clean Cu(110) surface exposed to 3.121013 atoms/cm2 (the actual coverage presumably being significantly smaller). Two species are observed: dark rings around

Frequently asked questions

Q1. What are the contributions in "Complex reactions on a convertible catalyst surface: a study of the s-o-cu system" ?

In this paper, the authors revisited the interaction of pure S onto Cu ( 110 ) by scanning tunneling microscopy ( STM ) and found an extremely complex variety of surface reactions with mobile cluster formation, long distance mass transport, and most notably formation of different minority species.