Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of Local Defects on the Dynamics of O-H Bond Breaking and
  Formation on a Magnetite Surface   The transport of H adatoms across oxide supports plays an important role in
many catalytic reactions. We investigate the dynamics of H/Fe3O4(001) between
295 and 382 K. By scanning tunneling microscopy at frame rates of up to 19.6
fps, we observe the thermally activated switching of H between two O atoms on
neighboring Fe rows. This switching rate changes in proximity to a defect,
explained by density functional theory as a distortion in the Fe-O lattice
shortening the diffusion path. Quantitative analysis yields an apparent
activation barrier of 0.94 +/- 0.07 eV on a pristine surface. The present work
highlights the importance of local techniques in the study of atomic-scale
dynamics at defective surfaces such as oxide supports.

13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
16
The categories of this paper are: stat