Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laser Assisted Solution Synthesis of High Performance Graphene Supported
  Electrocatalysts   Simple, yet versatile, methods to functionalize graphene flakes with metal
(oxide) nanoparticles are in demand, particularly for the development of
advanced catalysts. Herein, based on light-induced electrochemistry, a
laser-assisted, continuous, solution route for the simultaneous reduction and
modification of graphene oxide with catalytic nanoparticles is reported.
Electrochemical graphene oxide (EGO) is used as starting material and
electron-hole pair source due to its low degree of oxidation, which imparts
structural integrity and an ability to withstand photodegradation. Simply
illuminating a solution stream containing EGO and metal salt (e.g., H2PtCl6 or
RuCl3) with a 248 nm wavelength laser produces reduced EGO (rEGO, oxygen
content 4.0 at%) flakes, decorated with Pt (~2.0 nm) or RuO2 (~2.8 nm)
nanoparticles. The RuO2-rEGO flakes exhibit superior catalytic activity for the
oxygen evolution reaction, requiring a small overpotential of 225 mV to reach a
current density of 10 mA cm-2. The Pt-rEGO flakes (10.2 wt% of Pt) show
enhanced mass activity for the hydrogen evolution reaction, and similar
performance for oxygen reduction reaction compared to a commercial 20 wt% Pt/C
catalyst. This simple production method is also used to deposit PtPd alloy and
MnOx nanoparticles on rEGO, demonstrating its versatility in synthesizing
functional nanoparticle-modified graphene materials.

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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc