Promoting Role of Potassium on the Catalytic Performance of Copper Oxide for the Reduction of NO by Activated Carbon

The reduction of NO by activated carbon over a Cu-K-O mixed oxide catalyst was investigated. The addition of K to CuO obviously improved its catalytic performance and stability, and the optimum Cu/K weight ratio is 2. Characterization by X-ray photoelectron spectroscopy, X-ray diffraction, and temperature-programmed desorption shows that the presence of K can promote the reaction between the surface carbon active sites and the surface oxygen species to form. CO2 by a synergetic effect between Cu and K. Additionally, a higher surface concentration of Cu2+ is retained, which favors the Cu2+/Cu+ reduction cycle on the active sites.

摘要摘要：研究了活性炭负载的 Cu-K-O 复合氧化物催化剂上碳还原 NO 的反应. 结果表明, K 的加入可有效地提高 CuO 催化剂的活性和稳定性, 当 Cu/K 的质量比为 2 时催化性能最佳. X 射线衍射、X 射线光电子能谱和程序升温脱附-质谱等结果表明, K 与 Cu 间的协同作用可促进表面碳活化中心与表面氧物种生成 CO2 的反应, 保持表面 Cu2+活性中心的数量, 从而有利于 Cu2+/Cu+ 反应循环的进行.

NO was effectively reduced by activated carbon over a Cu-K-O catalyst. Adding K to CuO/AC promoted the reaction between the surface carbon active sites and the surface oxygen species.Figure optionsDownload as PowerPoint slide