Solvent-dependent self-assembly of a ruthenium(II) complex bearing triazino-phenanthrenes and its applications in photocatalytic ascorbate fuel cells

被引:2
|
作者
Li, Nanxi [1 ]
Lin, Weiliang [1 ]
Huang, Bin [1 ]
Chen, Zijie [1 ]
Chao, Hui [2 ]
Li, Hong [1 ]
机构
[1] South China Normal Univ, Sch Chem, Guangzhou 510006, Peoples R China
[2] Sun Yat Sen Univ, Dept Chem, Guangzhou 510275, Peoples R China
基金
中国国家自然科学基金;
关键词
Ruthenium(II) complex; Ascorbic acid; Triazino-phenanthrene; Photocatalytic fuel cell; Photoelectrocatalysis; SENSITIZED SOLAR-CELLS; PHOTOELECTROCATALYTIC OXIDATION; PHOTOELECTROCHEMICAL CELL; EXCITED-STATE; DNA-BINDING; URIC-ACID; ENERGY; PORPHYRIN; EFFICIENT; REDUCTION;
D O I
10.1016/j.electacta.2020.137155
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The triazine-based metal-organic frameworks (MOFs) are of great significance in a photocatalytic or electrocatalytic system. This paper reports solvent-dependent self-assembly and photoelectrochemical properties of [Ru(ptp)(2)](2+) (ptp = 3-(1,10-phenanthrolin-2-yl)-as-triazino[5,6f]phenanthrene) and its photoelectrocatalysis to ascorbate (AA) oxidation and oxygen reduction in photocatalytic fuel cells. [Ru(ptp)(2)](2+) can be dissolved in ethanol (E), ethanol/water mixtures (M), or water (W) to produce three forms of aggregates, which are further assembled into [Ru(ptp)(2)](2+) modified CdS photoanodes. The MOF form of [Ru(ptp)(2)](2+)-M shows the maximum absorbance at ethanol/water of 1:1 (V-e/V-w), and the resulting [Ru(ptp)(2)](2+)-M/CdS electrode has better conductivity, larger light-harvesting efficiency and photovoltaic response compared with that of [Ru(ptp)(2)](2+)-E/CdS. Furthermore, [Ru(ptp)(2)](2+)-M exhibits enhanced photoelectrocatalytic activity towards ascorbate oxidation and oxygen reduction. The simultaneous presence of [Ru(ptP)(2)](2+)-M on CdS photoanode and single-walled carbon nanotubes (SWCNTs) cathode used in visible light-excited ascorbate fuel cells, leads to a 1.1-fold or 4.5-fold increase in the open-circuit voltage or maximum power density. This present study provides a significant platform for solvent-dependent selfassembly of triazino-phenanthrene-containing metal complexes and improvement of photocatalytic fuel cell performances. (C) 2020 Elsevier Ltd. All rights reserved.
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页数:8
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