Pt3Co Octapods as Superior Catalysts of CO2 Hydrogenation

详细信息    查看全文

• 作者：Munir Ullah Khan ; Liangbing Wang ; Zhao Liu ; Zehua Gao ; Shenpeng Wang ; Hongliang Li ; Wenbo Zhang ; Menglin Wang ; Prof. Zhengfei Wang ; Prof. Chao Ma and Prof. Jie Zeng
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 8, 2016
• 年：2016
• 卷：55
• 期：33
• 页码：9548-9552
• 全文大小：4123K
• ISSN：1521-3773

文摘

As the electron transfer to CO₂ is a critical step in the activation of CO₂, it is of significant importance to engineer the electronic properties of CO₂ hydrogenation catalysts to enhance their activity. Herein, we prepared Pt₃Co nanocrystals with improved catalytic performance towards CO₂ hydrogenation to methanol. Pt₃Co octapods, Pt₃Co nanocubes, Pt octapods, and Pt nanocubes were tested, and the Pt₃Co octapods achieved the best catalytic activity. Both the presence of multiple sharp tips and charge transfer between Pt and Co enabled the accumulation of negative charges on the Pt atoms in the vertices of the Pt₃Co octapods. Moreover, infrared reflection absorption spectroscopy confirmed that the high negative charge density at the Pt atoms in the vertices of the Pt₃Co octapods promotes the activation of CO₂ and accordingly enhances the catalytic activity.