Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of a humid environment on the surface structure of RuO2(110)   Combining density-functional theory and thermodynamics we compute the phase
diagram of surface structures of rutile RuO2 (110) in equilibrium with water
vapor in the complete range of experimentally accessible gas phase conditions.
Through the formation of hydroxyl or water-like groups, already lowest
concentrations of hydrogen in the gas phase are sufficient to stabilize an
oxygen-rich polar oxide termination even at very low oxygen pressure.

10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga