环己烷
催化作用
分子筛
层状结构
氧化物
化学工程
氧化铜
铜
材料科学
己二酸
化学
无机化学
形态学(生物学)
有机化学
高分子化学
复合材料
冶金
工程类
生物
遗传学
作者
Xiangke Guo,Mengxia Xu,Minyi She,Yan Zhu,Tao-Tao Shi,Zhao‐Xu Chen,Luming Peng,Xuefeng Guo,Ming Lin,Weiping Ding
标识
DOI:10.1002/anie.201911749
摘要
Abstract Discrete nanosheets of silicon‐doped AlPO 4 molecular sieves (SAPO‐34) with a thickness of ≈7 nm have been prepared through morphology‐reserved synthesis with a lamellar aluminum phosphate as precursor. Cages of the nanosheets are in situ incorporated with copper oxide clusters. The CuO@SAPO‐34 nanosheets exhibit a large external surface area with a high number of (010) channel pores on the surface. Due to the thin morphology, copper oxide clusters occupy the outmost cages with a probability >50 %. The distinctive configuration facilitates a new concept of pore mouth catalysis, i.e., reactant molecules larger than the pores cannot enter the interior of the molecular sieves but can interact with the CuO clusters at “the mouth” of the pore. In heterogeneous catalysis, CuO@SAPO‐34 nanosheets have shown top performance in one‐pot oxidation of cyclohexane to adipic acid by O 2 , a key compound for the manufacture of nylon‐66, which is so far produced using non‐green nitric acid oxidation.
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