An attempt to stabilize supported Ru catalysts against oxidative volatilization

作者：Samed Ahmed J; Yamamoto Yohei; Hidaka Miyuki; Hinokuma Satoshi; Machida Masato^*

来源：Catalysis Communications, 2017, 91: 6-9.

DOI：10.1016/j.catcom.2016.11.023

• Ruthenium
• Volatilization
• Iron oxide
• Catalyst deactivation
• Three-way catalyst

Ru/Al2O3 is an active catalyst for the stoichiometric NO-CO-C3H6-O-2 reaction, whereas >90% of the loaded Ru was volatized during thermal ageing in airflow at 1000 degrees C for 100 h, resulting in considerable catalyst deactivation. Using alpha-Fe2O3 as support, the Ru volatilization was suppressed to a significant extent,. because Ru oxide was stabilized by dissolving into Fe2O3 to forma solid solution. Nevertheless, this metal-support interaction decreased the Ru concentration on the catalyst surface, thus leading to another catalyst deactivation route. The catalytic activity can be regenerated by applying H-2-reduction treatment to the aged Ru/Fe2O3 catalyst.

• 出版日期2017-3-5