Details

Autor(en) / Beteiligte

• Long, Ran
• Li, Yu
• Liu, Yan
• Chen, Shuangming
• Zheng, Xusheng
• Gao, Chao
• He, Chaohua
• Chen, Nanshan
• Qi, Zeming
• Song, Li
• Jiang, Jun
• Zhu, Junfa
• Xiong, Yujie

Titel

Isolation of Cu Atoms in Pd Lattice: Forming Highly Selective Sites for Photocatalytic Conversion of CO 2 to CH 4

Ist Teil von

• Journal of the American Chemical Society, 2017-03, Vol.139 (12), p.4486-4492

Ort / Verlag

United States

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Photocatalytic conversion of CO to CH , a carbon-neutral fuel, represents an appealing approach to remedy the current energy and environmental crisis; however, it suffers from the large production of CO and H by side reactions. The design of catalytic sites for CO adsorption and activation holds the key to address this grand challenge. In this Article, we develop highly selective sites for photocatalytic conversion of CO to CH by isolating Cu atoms in Pd lattice. According to our synchrotron-radiation characterizations and theoretical simulations, the isolation of Cu atoms in Pd lattice can play dual roles in the enhancement of CO -to-CH conversion: (1) providing the paired Cu-Pd sites for the enhanced CO adsorption and the suppressed H evolution; and (2) elevating the d-band center of Cu sites for the improved CO activation. As a result, the Pd Cu -TiO photocatalyst achieves the high selectivity of 96% for CH production with a rate of 19.6 μmol g h . This work provides fresh insights into the catalytic site design for selective photocatalytic CO conversion, and highlights the importance of catalyst lattice engineering at atomic precision to catalytic performance.