文献类型： 外文期刊

作者： Zhao, Si-Yang ¹ ; Zhu, Xue-Ling ¹ ; Wang, Xue-Han ¹ ; Cao, Yuan-Yang ¹ ; Li, Qing-An ¹ ; Qin, Shu-Yi ¹ ; Wang, Tian-Shun ¹ ; Zhang, Hua-Xin ¹ ;

作者机构： 1.Guangxi Univ, Sch Chem & Chem Engn, Nanning, Peoples R China

2.Guangxi Acad Agr Sci, Res Inst Agroprod Qual Safety & Testing Technol, Nanning, Peoples R China

3.Guangxi Univ, Sch Chem & Chem Engn, 100,Daxue East Rd, Nanning 530004, Guangxi, Peoples R China

关键词： copper(II) complex; electrocatalyst; triazolylpyridine; water oxidation reaction

期刊名称：APPLIED ORGANOMETALLIC CHEMISTRY （ 影响因子：3.9； 五年影响因子：3.5 ）

ISSN： 0268-2605

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Water oxidation reaction (WOR) is a rather sluggish process in the water splitting that hampers the extraction of hydrogen gas from water in a large scale. It is highly desirable to develop low-cost WOR catalysts to increase the efficacy. Herein two Cu(II) complexes [Cu (DTEL)(2)](n)(ClO4)(2n) (1) and [Cu(DTE)(2)(ClO4)(2)] (2) of two triazolylpyridines, 1-(2-hydroxy)-4-(2-pyridyl)1,2,3-triazole (DTEL) and 1-(2-acetoxymethyl)-4-(2-pyridyl)1,2,3-triazole (DTE), have been synthesized and characterized. The X-ray diffraction analysis revealed that the copper centers of 1 and 2 adopted the octahedral coordination geometry with four N atoms from two DTEL or DTE ligands in the equatorial plane. The two axial sites were weakly ligated by the hydroxyl group of DTEL or perchlorate. Both complexes 1 and 2 were homogenous molecular catalysts boosting the WOR in pH 9.0 phosphate buffer solution with the overpotentials being 568 and 478 mV, rate constants (k(cat)) of 0.1 and 0.39 s(-1), and Faradaic efficiencies of 90% and 93%, respectively. The pendant substituent on the two triazolylpyridine ligands DTEL and DTE apparently influenced the catalysis. A mechanism for the catalytic WOR mediated by 1 and 2 was suggested on the basis of the experimental data. This work illustrated that triazolylpyridines were promising scaffolds for forming metal complexes working as WOR catalysts.