NO selective reduction by hydrogen over bimetallic Pd-Ir/TiO2 catalyst

作者：Li Jia; Wu Guangjun; Guan Naijia; Li Landong^*

来源：Catalysis Communications, 2012, 24: 38-43.

DOI：10.1016/j.catcom.2012.03.014

• H-2-SCR
• Pd-Ir/TiO2
• Bimetallic catalyst
• XPS
• FTIR

TiO2 supported monometallic and bimetallic catalysts were prepared and employed in the selective catalytic reduction of nitrogen oxides by hydrogen (H-2-SCR). Bimetallic Pd-Ir/TiO2 exhibited high activity in H-2-SCR reaction and NOx conversion of >80%, with N-2 selectivity >80%, could be obtained in the temperature range of 413-473K. The existence states of supported metals before and after H-2-SCR were investigated by X-ray photoelectron spectroscopy, and the surface species formed during H-2-SCR reaction were monitored by in situ FTIR spectroscopy. Based on the catalytic and characterization results, the synergistic effects between Pd and Ir were discussed and the H-2-SCR reaction pathways over Pd-Ir/TiO2 were proposed.

• 出版日期2012-7-5
• 单位南开大学