催化作用
钌
分散性
金属
色散(光学)
苯
化学
无定形固体
光化学
材料科学
结晶学
有机化学
物理
光学
作者
Ning Tang,Cong Ye,Qinghao Shang,Chunzheng Wu,Guoliang Xu,Xiaodong Wang
标识
DOI:10.1021/acscatal.7b01816
摘要
Single metal atoms and metal clusters have attracted much attention because of their high dispersity, special electronic structures, and uniformity of active sites as heterogeneous catalysts, but it is still challenging to generate stable single atoms and clusters with high metal loadings. Supports play a crucial role in determining particle morphology and maintaining dispersion. Herein we synthesize an amorphous alumina with 29% coordinatively unsaturated pentacoordinate Al3+ (Al3+penta) sites, which can anchor atomically dispersed Ru species with 1 wt % loading. Strong interactions between Ru and Al3+penta centers were detected, resulting in distinct Ru geometric and electronic features. When used in benzene hydrogenation reaction, fairly high specific activity (TOF = 5180 h–1) were obtained. The high catalytic performance is considered closely correlated with the high utilization of special Ru active sites.
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