共浸渍制备高效的Ru/AC氨合成催化剂

通过钌的络合物前驱体和硝酸钡的共浸渍制备的Ru Ba K/AC催化剂氨合成转化效率高，其氨合成转化频率在0.87～1.30 s-1之间，与氯化钌制备的Ru/AC催化剂相比，其转化频率提高幅度在26%～88%。共浸渍法制备的催化剂氨合成转化效率高，其主要原因可能是共浸渍法制备的催化剂钌粒子粒径分布区间较窄,易形成更多的活性位；钌表面氢的吸附受到抑制，氮更易活化，因而催化效率更高。

Efficient Ru/AC Catalysts Prepared by Co-impregnation for Ammonia Synthesis

Ru+Ba+K/AC catalysts with high turnover frequency were synthesized by co-impregnation with Ba(NO3)2 and the complex compound of glycerol and K2RuO4. The turnover frequency of the prepared catalysts is between 0.87 and 1.30 s−1, which is 1.26 to 1.88 times higher than that of the Ru/AC catalyst with RuCl3¬¬ as a precursor for ammonia synthesis. The higher turnover frequency of the Ru+Ba+K/AC catalysts than the Ru/AC catalyst could be attributed to the higher absorption and lower activation energy of nitrogen on the Ru surface and the narrow-sized distribution of Ru nanocrystals at the reaction temperature.