High-performance Cu/ZnO/Al2O3 catalysts for methanol steam reforming with enhanced Cu-ZnO synergy effect via magnesium assisted strategy

• 作者: Zaizhe Cheng Wenqiang Zhou Guojun Lan Xiucheng Sun Xiaolong Wang Chuan Jiang Ying Li
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（12）
• 页码范围: 550-557
• 页数: 8页
• 语种: 英文

摘要

Methanol steam reforming (MSR) is an attractive approach to produce hydrogen for fuel cells.Due to the limited catalyst loading volume and frequent start-ups and shut-downs on board,it is highly desired to develop an extremely active and robust catalyst.Herein,on the basis of industrial Cu/ZnO/Al2O3 catalysts,a series of CuZnAl-xMg catalysts with enhanced Cu-ZnO synergy were synthesized via magnesium assisted strategy.The incorporation of magnesium was found to be beneficial to the enhancement of cat-alytic activity and stability of catalyst.A combination of complementary characterizations (e.g.XRD,H2-TPR,N2O chemisorption,TEM,XPS analysis etc.) proves that isomorphous substitution of Cu2+ in mala-chite phase gives rise to more dispersive Cu and ZnO NPs,and the increased Cu+/Cu0 ratio indicates the strengthened Cu-ZnO synergy effect,which leads to the boosted stability during the thermal treatment.