空心海胆状 NiO/NiCoO 异质结构作为高效催化剂用于选择性氧化苯乙烯。
Hollow urchin-like NiO/NiCoO heterostructures as highly efficient catalysts for selective oxidation of styrene.
机构信息
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China.
出版信息
J Colloid Interface Sci. 2018 Sep 15;526:295-301. doi: 10.1016/j.jcis.2018.05.001. Epub 2018 May 3.
Three-dimensional (3D) hierarchical hollow urchin-like NiO/NiCoO heterostructures have been prepared via a facile one-pot hydrothermal method. The 3D urchin-like structure brings about high specific surface area of 40.2 m g. The NiO/NiCoO heterostructures are composed of 59 wt% of NiO and 41 wt% of NiCoO and enriched with NiO-NiCoO phase boundaries. When used as catalysts for styrene oxidation reaction (SOR), the NiO/NiCoO heterostructures present a markedly high selectivity of 90.8% to styrene oxide (SO) and a high SO yield of 81.4%. The high catalytic performance of the NiO/NiCoO heterostructures can be attributed to the high specific surface area and the abundant NiO-NiCoO phase boundaries, both of which contribute to the numerous active sites.
通过简便的一锅水热法制备了三维（3D）分层空心海胆状 NiO/NiCoO 异质结构。3D 海胆状结构带来了 40.2 m²/g 的高比表面积。NiO/NiCoO 异质结构由 59 wt%的 NiO 和 41 wt%的 NiCoO 组成，并富含 NiO-NiCoO 相界。当用作苯乙烯氧化反应（SOR）的催化剂时，NiO/NiCoO 异质结构对苯乙烯氧化物（SO）表现出高达 90.8%的显著选择性和高达 81.4%的 SO 收率。NiO/NiCoO 异质结构的高催化性能归因于高比表面积和丰富的 NiO-NiCoO 相界，两者都有助于产生大量的活性位点。
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