Cr (VI) catalytic hydrogenation reduction method

The invention provides a Cr (VI) catalytic hydrogenation reduction method which comprises the following steps: adding a catalyst into a water body containing Cr (VI) pollutants, adjusting the pH value, introducing N2, and finally introducing H2, wherein the catalyst is a supported noble metal catalyst with nanogold and palladium atoms deposited on the surface of the nanogold as active components and aluminum oxide as a carrier, and the general formula of the catalyst is PdSAs-AuNPs/Al2O3. The method has remarkable high efficiency and stability on catalytic hydrogenation reduction of Cr (VI), continuous utilization of atomic noble metal Pd is achieved, and the method is suitable for industrial production. The cyclic utilization rate of the precious metal Pd is increased, the dosage of the precious metal is reduced, and good economic and environmental benefits are achieved. 本发明提供了一种Cr(Ⅵ)催化加氢还原的方法，该方法包括：在含Cr(Ⅵ)污染物的水体中加入催化剂，并调节pH，通入N2，最后通入H2；其中，所述催化剂为以纳米金和沉积在纳米金表面的钯原子为活性组分、以三氧化二铝为载体的负载型贵金属催化剂，通式为PdSAs-AuNPs/Al2O3