Two Novel Catalysts Based on Nickel-Substituted POMs Hybrids for Photocatalytic H2 Evolution from Water Splitting

Autor: Shu Y. Shi, Yuan Yuan, Chuan W. Zhou, Shi Y. Geng, Feng W. Xia, Dan Bai, Zhao Y. Xie, Lin Du, Jin Y. Zhang
Rok vydání: 2021
Předmět:
Zdroj: Journal of Cluster Science. 33:1951-1960
ISSN: 1572-8862
1040-7278
DOI: 10.1007/s10876-021-02112-6
Popis: Two novel hybrid compounds [Ni(2,2-bpy)3]2.5(PNiW11O40)]·3.1(H2O) (1) and [Ni4(pyz)2][A-α-PW9O34]2·(pyz)5·7H2O (2) (bpy = 2,2′-bpyridine, pyz = piperazine) have been synthesized under mild hydrothermal condition and structurally characterized by physico-chemical and series spectroscopic methods. Compound 1 contains nickel(II) mono-substituted Keggin type polyoxotungstate {PNiW11O39} anion, two and a half discrete [NiII(2,2-bpy)3]2+ complexes and 3.1 water molecules. Compound 2 is composed of a novel tetra-nickel-substituted sandwich-type {[Ni4(pyz)2][A-α-PW9O34]2} polyanion, three free piperazine molecules and seven lattice water molecules. Extensive hydrogen-bonding interactions were observed in 1 and 2. Through multipoint hydrogen-bonding interactions, a novel 2D network with rectangular cavities for 1 and a 3D porous supermolecule structure for 2 generate, respectively. The investigation of both nickel-substituted hybrids as efficient and robust catalysts for H2 production from water splitting and photo-degradation pharmaceutical wastewater upon visible-light irradiation was carried out.
Databáze: OpenAIRE
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