Table 2. Change in the Catalytic Reduction Rate Constants of o-Nitroaniline and m-Nitroaniline with Different Temperatures and Activation Parameters in Catalysis with Nickel Oxide Nanoparticles
| Compound | Temperature (°C) | k (min−1) | R2 (COD) | Ea (kJ mol−1) | ΔH (kJ mol−1) | ΔS (J mol−1K−1) |
| o-nitroaniline | 30 | 0.00727 | 0.99224 | 125.20 | 122.74 | 540.53 |
| 35 | 0.01953 | 0.99212 |
| 45 | 0.03549 | 0.99228 |
| m-nitroaniline | 30 | 0.02010 | 0.99968 | 75.09 | 72.53 | 384.22 |
| 35 | 0.03697 | 0.99696 |
| 40 | 0.05197 | 0.99719 |
(Reaction condition: 10 ml [o-, m-nitroaniline] = 0.0145 mM, [NaBH4] = 13.4 mM, 5mg catalyst.)
Rate constant (k), coefficient of determination (R2), activation energy (Ea), enthalpy (ΔH), and entropy (ΔS) for the NaBH4 reduction of o-nitroaniline, m-nitroaniline at different temperatures using nickel oxide nanoparticles catalyst