Tables at a glance

Table 1

Figures at a glance

Comments

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Figure 9

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Scheme 1

Table 1

Parameters	Methyl orange	Congo red
Synonym	54
7-58-0 Orange III	Direct red 28
Molecular Weight	327.33g/mol	696.665g/mol
Molecular formula	C14H14N3O3SNa	C32H22N6Na2O6S2
Type	Acid dye	Acid-Basic Indicator
λmax	460-470 nm	497-498 nm
Solubility in water	Soluble	Soluble

Table 1: Materials utilized to synthesize PPGs

FIGURE 1

Figure 1: Figure 1: XRD patterns of F-NiO

FIGURE 2

FIGURE 3

Figure 3: TEM micrographs of F-NiO

FIGURE 4

Figure 4: (a) N₂ adsorption/desorption isotherms and (b) BJH pore size distribution plots of flower-like NiO nanocrystals

FIGURE 5

Figure 5: XRD patterns of (a) 2 wt% Cu/F-NiO (b) 2 wt%Pd/F-NiO and (c) 2 wt% Pd₁Cu₁/F-NiO

FIGURE 6

Figure 6: (a) FE-SEM of the Pd₁Cu₁/F-NiO and EDAX mapping analysis of (b) Pd and (c) Cu in the Pd₁Cu₁/F-NiO

Table 1

Catalyst	Pd (wt%)	Cu (wt%)	Pd:Cu (at.)
Pd /F-NiO	1.93	0
Cu/F-NiO	0	1.85
Pd₁Cu₁/F-NiO	1.12	0.96	1

Table 1: Pd and Cu Content (wt %) in Catalysts and the Ratio of Pd and Cu Determined by ICP-MS analysis

FIGURE 7

Figure 7: TEM (a) and HRTEM (b, c) images of Pd₁Cu₁/F-NiO

FIGURE 8

Figure 8: Catalytic performance of CO oxidation over the catalysts

FIGURE 9

Figure 9: Catalytic performance of CO oxidation over the catalysts

SCHEME 1

Scheme 1: The reaction process of Pd1Cu1/F-NiO