Perovskite-Like Metal-Organic Framework of Cobalt Formate as High-Performance Electrocatalyst for Dye-Sensitized Solar Cells: From Microcube to Nanotube.

IF 3.5 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yu-Chien Lee, Chun-Ting Li
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引用次数: 0

Abstract

Perovskite-like metal-organic framework of cobalt formate, that is, [(CH3)2NH2][Co(HCOO)3]n (denoted as Co(HCOO)3), has successfully grown on a conductive carbon cloth (CC) with or without surfactant. The insertion of various thiolate surfactants, for example, 2-mercaptobenzoxazole (MBO), 2-mercaptobenzimidazole (MBI), and 2-mercaptobenzothiazole (MBT), effectively confined the particle size to microcubes owing to the core@shell structure of H2O@dimethylformamide (DMF) reverse micelles. The insertion of benzeneselenolate (PhSe-) caused the formation of both microcubes and nanotubes. When some H2O@DMF reverse micelles were intensively surrounded by benzeneselenious anions (R-SeO3 - or R-SeO2 -), the strong π-π stacking among benzenes would induce the crystal growth through 1D direction, leading to the formation of Co(HCOO)3 nanotubes uniformly covered on CC. Among all the CC/Co(HCOO)3 electrodes, the CC/PhSe-doped Co(HCOO)3 electrodes reached the optimal electrocatalytic performance toward triiodide reduction, and thereby functioned as the outstanding counter electrode in dye-sensitized solar cell (DSSC). Good DSSCs' efficiencies of 9.73% (1 sun) and 24% (at 6 klux) can be obtained by using CC/PhSe-doped Co(HCOO)3, which surpassed the cells with CC/bare Co(HCOO)3 (5.25% at 1 sun) and the benchmark CC/Pt (9.85% at 1 sun), owing to numerous electro-donating R-SeO3 -/R-SeO2 - dopants as active sites and facile 1D charge-transfer pathways.

钙钛矿类金属-有机框架甲酸钴作为染料敏化太阳能电池的高性能电催化剂:从微立方到纳米管。
在有或无表面活性剂的导电碳布(CC)上成功生长了类钙钛矿的金属有机骨架甲酸钴,即[(CH3)2NH2][Co(HCOO)3]n(记为Co(HCOO)3)。由于H2O@dimethylformamide (DMF)反胶束的core@shell结构,各种硫化物表面活性剂,如2-巯基苯并恶唑(MBO)、2-巯基苯并咪唑(MBI)和2-巯基苯并噻唑(MBT)的插入,有效地将粒径限制在微立方体。苯烯酸酯(PhSe-)的插入导致微立方体和纳米管的形成。当某些H2O@DMF反胶束被苯系阴离子(R-SeO3 -或R-SeO2 -)密集包围时,苯之间的强π-π堆积会诱导晶体沿一维方向生长,形成Co(HCOO)3纳米管,均匀覆盖在CC上,在CC/Co(HCOO)3电极中,CC/掺杂的Co(HCOO)3电极对三碘化物还原的电催化性能最佳。从而成为染料敏化太阳能电池(DSSC)中出色的对电极。使用CC/ phse掺杂Co(HCOO)3可以获得9.73%(1太阳)和24% (6 klux)的良好DSSCs效率,超过了CC/裸Co(HCOO)3(1太阳时5.25%)和基准CC/Pt(1太阳时9.85%)的电池,这是由于大量的电供体R-SeO3 -/R-SeO2 -掺杂作为活性位点和易于实现的1D电荷转移途径。
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来源期刊
Chemistry - An Asian Journal
Chemistry - An Asian Journal 化学-化学综合
CiteScore
7.00
自引率
2.40%
发文量
535
审稿时长
1.3 months
期刊介绍: Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).
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