Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principles statistical mechanics study of the stability of a
  sub-nanometer thin surface oxide in reactive environments: CO oxidation at
  Pd(100)   We employ a multiscale modeling approach to study the surface structure and
composition of a Pd(100) model catalyst in reactive environments. Under gas
phase conditions representative of technological CO oxidation (~1 atm, 300-600
K) we find the system on the verge of either stabilizing sub-nanometer thin
oxide structures or CO adlayers at the surface. Under steady-state operation
this suggests the presence or continuous formation and reduction of oxidic
patches at the surface, which could be key to understand the observable
catalytic function.

37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg