您好，欢迎访问广西农业科学院 机构知识库！

Nickel (II) tetrapyridyl complexes as electrocatalysts and precatalysts for water oxidation

文献类型： 外文期刊

作者： Li, Qi-Jun 1 ; Ren, Ya-Jie 1 ; Xie, Qin 1 ; Wu, Min 1 ; Feng, Hua-Xing 1 ; Zheng, Li-Mei 1 ; Zhang, Hua-Xin 1 ; Long, Jin 1 ;

作者机构： 1.Guangxi Univ, Coll Chem & Chem Engn, 100 Daxue East Rd, Nanning 530004, Guangxi, Peoples R China

2.Baise Univ, Coll Chem & Environm Engn, Baise 533000, Guangxi, Peoples R China

3.Guangxi Acad Agr Sci, Res Inst Agroprod Qual Safety & Testing Technol, Nanning 530007, Guangxi, Peoples R China

关键词： electrocatalyst; nickel(II) complex; nickel oxide; polypyridine; water oxidation reaction

期刊名称：APPLIED ORGANOMETALLIC CHEMISTRY （ 影响因子：4.105； 五年影响因子：3.966 ）

ISSN： 0268-2605

年卷期： 2020 年 34 卷 10 期

页码：

收录情况： SCI

摘要： Two nickel complexes, [Ni(tpen)](ClO4)(2).0.5CH(3)COCH(3) (1) and [Ni(tpbn)](ClO4)(2) (2), of tetrapyridyl ligands N,N,N ',N '-tetrakis(2-pyridyl-methyl)-1,2-ethanediamine (tpen) and N,N,N ',N '-tetrakis(2-pyridyl-methyl)-1,4-butanediamine (tpbn) were prepared and their catalysis for water oxidation reaction (WOR) studied. In 0.1 M phosphate buffer solution (PBS) of pH 8.0, complex 1 is a homogeneous molecular catalyst with an overpotential of similar to 440 mV and a Faradaic efficiency of 89%. At pH >= 9.0, complex 1 degraded gradually during the catalytic process and formed NiOx composite (nickel oxide with general formula NixOyHz) active for WOR. In contrast, complex 2 deteriorated under measured conditions (pH 8.0-12.0) and formed NiOx composite active for WOR. The NiOx composite derived from 1 in 0.1 M PBS at pH 11.0 showed an activity with an overpotential of similar to 500 mV, a Tafel slope of similar to 90 mV/decade and a Faradaic efficiency of 97%. Mechanisms were proposed for water oxidation catalyzed by 1 and 2. This work revealed that the catalytic activity of the nickel complexes was related to the flexibility of the tetrapyridyl ligands and the adaptability of the coordination sphere of the nickel(II) center.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：广西农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台