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<p>A core-shell type Co<sub>19</sub>-added polyoxometalate H<sub>17</sub>Na<sub>4</sub>Cs<sub>21</sub>[Co<sub>19</sub>(<i>μ</i><sub>3</sub>-OH)<sub>12</sub>(A-<i>α</i>-SiW<sub>10</sub>O<sub>37</sub>)<sub>6</sub>]·8Cl·12H<sub>2</sub>O (<b>1</b>) has been made under hydrothermal conditions guided by the lacunary directing synthetic strategy. Single crystal X-ray diffraction (SXRD) has shown that 19 Co<sup>2+</sup> are arranged in a flat plane through edge sharing in a mode of 3-4-5-4-3, forming a core-shell type polyanion cluster <b>{Co</b><sub><b>19</b></sub><b>(SiW</b><sub><b>10</b></sub><b>)</b><sub><b>6</b></sub><b>}</b> with a diameter of approximately 2.24 nm. Visible-light-driven photocatalytic hydrogen evolution performance studies have shown that <b>1</b> is an efficient heterogeneous water reduction catalyst (WRC) with the H<sub>2</sub> evolution rate of 2902.5 µmol h<sup>−1</sup> g<sup>−1</sup>. Moreover, the cycle tests indicated that <b>1</b> was also a good heterogeneous catalyst.</p>

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A core-shell type Co19-added polyoxometalate for visible-light-driven photocatalytic hydrogen evolution

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Zhen-Wen Wang,
  • Guo-Yu Yang

摘要

A core-shell type Co19-added polyoxometalate H17Na4Cs21[Co19(μ3-OH)12(A-α-SiW10O37)6]·8Cl·12H2O (1) has been made under hydrothermal conditions guided by the lacunary directing synthetic strategy. Single crystal X-ray diffraction (SXRD) has shown that 19 Co2+ are arranged in a flat plane through edge sharing in a mode of 3-4-5-4-3, forming a core-shell type polyanion cluster {Co19(SiW10)6} with a diameter of approximately 2.24 nm. Visible-light-driven photocatalytic hydrogen evolution performance studies have shown that 1 is an efficient heterogeneous water reduction catalyst (WRC) with the H2 evolution rate of 2902.5 µmol h−1 g−1. Moreover, the cycle tests indicated that 1 was also a good heterogeneous catalyst.