Catalytic hydrogenation of 2-nitro-2′-hydroxy-5′-methylazobenzene over solid base-hydrogenation bifunctional catalysts: Effect of alkali metals on Pd/γ-Al2O3
Alkali metals doped Pd catalysts were employed in the hydrogenation reaction. The catalysts doped by alkali metals exhibited different catalytic performance. 84.79% benzotriazole selectivity was obtained over K doped catalyst. K doped catalyst could run over 100 h without obvious deactivation. Basic sites of K doped catalyst distribute around Pd particles strictly.