Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superior-catalytic performance of Ni-Co Layered double hydroxide
  nanosheets for the reduction of p-nitrophenol   Layered double-hydroxides (LDHs) are superior to the conventional (Transition
Metal Oxides) TMOs as their lamellar morphology accommodates higher active
sites contributing to the facile electron transfer towards the material
degradation relations, thus attracts an immense attention for catalysis
application. Moreover, the high catalytic activity of LDHs is linked to their
facile anion exchange, specific electronic structures, and versatile chemical
compositions. Recently, LDHs with bimetallic or ternary combinations are
preferably used for hydrogenation of p-nitrophenol, a toxic and carcinogenic
pollutant commonly found in industrial wastewater. Herein, a cost-effective
co-precipitation fabrication protocol to obtain Ni-Co layered double hydroxide
is proposed. The well-defined arrangement of active sites in the 2D structure
of LDH, and the synergistic catalytic effect of Ni and Co greatly improves the
efficiency for the conversion of p-nitrophenol (p-NP) to p-aminophenol (p-AMP).
The catalytic performance at higher temperatures is also shown. The obtained
results are further extended to explore the advantage of Ni-Co LDH as an
electrocatalyst for Hydrogen Evolution Reaction (HER).

22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an