Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topographical study of TiO2 nanostructure surface for photocatalytic
  hydrogen production   In the present work we investigate the photocatalytic hydrogen production
(water splitting) activity of different Pt loaded TiO2 nanotube layers.
Therefore, we fabricate free standing membranes and fix them in four different
configurations: top up (with initiation layer grass or without) and bottom up
(bottom closed or open), then decorate the tubes with various amounts of Pt and
measure the open-circuit photocatalytic H2 production rate. We find a strong
influence of the configuration with the open top morphology showing the highest
photocatalytic hydrogen production efficiency, these nanotubes yield 3.5 times
more H2 than the least efficient structure (bottom closed). The work therefore
provides valuable guidelines for optimizing TiO2 nanotube layers for
photocatalytic applications.

14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph