Table 2 XRD parameters calculated for diffraction line “200”.

From: The role of promoters on NiO catalysts for methane decomposition and hydrogen production

Sample

2θ (deg)

β (FWHM)

Crystal size (nm)

d spacing (Å)

a (Å)

NiO

43.22

0.28

30.5

2.091

4.182

10% Al-NiO

43.24

0.30

28.5

2.09

4.18

10% Co-NiO

43.18

0.24

35.6

2.093

4.185

10% Cu-NiO

43.26

0.34

25.1

2.089

4.178