Photocatalytic water splitting for hydrogen and oxygen evolution using cobalt- substituted polyoxometalates

IF 2.5 Q2 CHEMISTRY, MULTIDISCIPLINARY Results in Chemistry Pub Date : 2024-10-01 DOI:10.1016/j.rechem.2024.101824

Jiaqi Fang , Wenlong Sun

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Abstract

The synthesis and photocatalytic properties of cobalt-incorporated polyoxometalate H₁₈[α₁-P₂W₁₇Co(H₂O)O₆₁]-[Co₄(H₂O)₂(PW₉O₃₄)₂] (1) were reported, and split into α₁-H₈-[P₂W₁₇Co(H₂O)O₆₁] (2) and H₁₀[Co₄(H₂O)₂(PW₉O₃₄)₂] (3) by adjusting the types of acids and solvents in the reaction. The photocatalytic production of O₂ and H₂ from water by compounds 1, 2 and 3 was evaluated. Notably, compounds 1 and 2 demonstrate superior performance in the photocatalytic production of both hydrogen and oxygen, whereas compound 3 solely exhibits activity in the photocatalytic generation of oxygen. The significantly enhanced performance against the control [P₂W₁₈O₆₂]⁶⁻ can be attributed to the modulation of the electronic structures of these novel POMs facilitated by the incorporation of cobalt.

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使用钴取代的多氧金属酸盐进行光催化水分离以实现氢和氧的进化

报告了掺钴聚氧化金属酸盐 H18[α1-P2W17Co(H2O)O61]-[Co4(H2O)2(PW9O34)2]（1）的合成和光催化性能，并通过调整反应中酸和溶剂的种类将其分为 α1-H8-[P2W17Co(H2O)O61]（2）和 H10[Co4(H2O)2(PW9O34)2]（3）。评估了化合物 1、2 和 3 从水中光催化产生 O2 和 H2 的情况。值得注意的是，化合物 1 和 2 在光催化产生氢气和氧气方面表现出卓越的性能，而化合物 3 仅在光催化产生氧气方面表现出活性。与对照[P2W18O62]6-相比，化合物 1 和化合物 2 的性能明显增强，这是因为钴的加入改变了这些新型 POM 的电子结构。

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