Syntheses, Structural Characterization, and Catalytic Properties of Di- and Trinickel Polyoxometalates

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• 作者：Weiwei Guo ; Hongjin Lv ; John Bacsa ; Yuanzhe Gao ; Je Seong Lee ; Craig L. Hill
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：January 19, 2016
• 年：2016
• 卷：55
• 期：2
• 页码：461-466
• 全文大小：360K
• ISSN：1520-510X

文摘

The syntheses, structural characterization, and catalytic properties of two different nickel-containing polyoxometalates (POMs) are presented. The dinickel-containing sandwich-type POM [Ni₂(P₂W₁₅O₅₆)₂]^20– (Ni₂) exhibits an unusual αααα geometry. The trinickel-containing Wells–Dawson POM [Ni₃(OH)₃(H₂O)₃P₂W₁₆O₅₉]^9– (Ni₃) shows a unique structure where the [α-P₂W₁₅O₅₆]^12– ligand is capped by a triangular Ni₃O₁₃ unit and a WO₆ octahedron. Ni₃ shows a high catalytic activity for visible-light-driven hydrogen evolution, while the activity for Ni₂ is minimal. An analysis of the structures of multinickel-containing POMs and their hydrogen evolution activity is given.