In this study, nitrogen-doped mesoporous carbon (NDC) and vanadium-doped (V₂O₅/NDC) catalysts were synthesized and 

systematically investigated for low-temperature selective catalytic reduction (SCR) of NOₓ with NH₃. Undoped mesoporous 

carbon (MPC) exhibited poor NOₓ conversion (<10%) over 80–350 °C. In contrast, NDC catalysts showed significantly 

enhanced performance, achieving>40% NOₓ conversion with high N₂ selectivity (>95%) between 170 and 290 °C, with 

NDC1.5 reaching~95% conversion at 230 °C. To further optimize activity, V₂O₅ (1–10 wt%) was loaded onto NDC1. The 

optimal 7VNDC1 catalyst achieved>90% NOₓ conversion (98% at 230 °C) and 95% N₂ selectivity across 200–290 °C. 

Moreover, 7VNDC1 demonstrated excellent durability, maintaining 92% NOₓ conversion and 99% N₂ selectivity over 12 h 

at 200 °C. Physicochemical characterizations revealed high surface areas (1191–1804 m²/g) and mesoporosity favorable 

for gas adsorption. They also confirmed successful N-doping, predominantly as pyrrolic nitrogen (N-5), and homogeneous 

dispersion of vanadium species, which synergistically improved redox properties. In-situ DRIFTS studies revealed that 

both Langmuir-Hinshelwood and Eley-Rideal mechanisms operate at 200 °C, with Eley-Rideal being dominant. Overall, 

this work demonstrates that V₂O₅-loaded NDC is a highly effective, stable low-temperature SCR catalyst, offering a promising

route for NOₓ mitigation with minimal secondary emissions.