Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nanostructures Design: the Role of Cocatalysts for Hydrogen and Oxygen
  Generation in Photocatalytic Water Splitting   Due to the energy supply pressure caused by non-renewable fuels as well as
the environment-related issues, the efficient conversion of solar-chemical
energy via photo-induced water splitting is one of the promising strategies to
address the existing problems. To strengthen the overall catalytic performance
of photocatalytic hydrogen (H2) and oxygen (O2) evolution, the selection and
construction of cocatalysts are crucial. Recently, the semiconductor
photocatalysts have been well modified with the loaded cocatalysts as the
active sites by extending the light harvest, promoting the electron separation
and transfer, and improving the photocatalytic activity. Combined with the
principles of photocatalysis, the paper focuses on the mechanism and roles of
cocatalysts for boosted photocatalytic water splitting in recent research. The
categories with the corresponding research contents of the existing cocatalysts
are also summarised, including cocatalysts for H2 evolution, cocatalysts for O2
evolution, and dual cocatalysts for overall water splitting. Finally, the
future direction of the development is suggested for the rational design and
large-scale application of highly efficient cocatalysts in the photo-induced
water splitting system.

17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph