格反应在有机化学教学中的应用
代水星, 姜基磊, 王昱晓, 胡锦祺, 黄明华
【大学化学】doi: 10.12461/PKU.DXHX202405208
将本科课程中的脑文格反应等有机化学内容与有机太阳能电池研究前沿紧密结合,通过实验让学生深入了解有机化学课程中的化学反应。该实验利用脑文格反应合成了一个宽带隙的稠环电子受体材料A831,通过对实验数据进行分析,确定材料是通过削弱端基的拉电子能力,提升了材料的最低未占有分子轨道(LUMO)能级,进而获得高电压的有机太阳能电池。该实验充分培养了学生运用基础知识解决科研问题的能力,体现了“基础知识–实际应用”的有机实验教学模式,适合作为面向高年级本科生的综合实验教学课程。
关键词: 有机太阳能电池, 脑文格反应, 有机化学, 稠环电子受体
Hydrogen production performance of the non-platinum-based MoS2/CuS cathode in microbial electrolytic cells
Pingping HAO, Fangfang LI, Yawen WANG, Houfen LI, Xiao ZHANG, Rui LI, Lei WANG, Jianxin LIU
【无机化学学报】doi: 10.11862/CJIC.20240054
MoS2/CuS composite catalysts were successfully synthesized using a one-step hydrothermal method with sodium molybdate dihydrate, thiourea, oxalic acid, and copper nitrate trihydrate as raw materials. The hydrogen production performance of MoS2/CuS prepared with different molar ratios of Mo to Cu precursors (nMonCu) as cathodic catalysts was investigated in the two-chamber microbial electrolytic cell (MEC). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), linear scanning voltammetry (LSV), electrochemical impedance analysis (EIS), and cyclic voltammetry (CV) were used to characterize the synthesized catalysts for testing and analyzing the hydrogen-producing performance. The results showed that the hydrogen evolution performance of MoS2/CuS-20% (nMonCu=5∶1) was better than that of platinum (Pt) mesh, and the hydrogen production rate of MoS2/CuS-20% as a cathode in MEC was (0.203 1±0.023 7) mH23·m-3·d-1 for 72 h at an applied voltage of 0.8 V, which was slightly higher than that of Pt mesh of (0.188 6±0.013 4) mH23·m-3·d-1. The addition of a certain amount of CuS not only regulates the electron transfer ability of MoS2 but also increases the density of active sites.
关键词: microbial electrolysis cell, hydrogen evolution reaction, MoS2/CuS composite catalyst, Pt mesh

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