The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China; Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China.
The College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; MOE Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300071, China; Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China.
Bioresour Technol. 2017 Nov;244(Pt 1):206-212. doi: 10.1016/j.biortech.2017.07.034. Epub 2017 Jul 8.
Metal-organic framework Cu(BTC), prepared by an easy hydrothermal method, was used as the oxygen-based catalyst in microbial fuel cell (MFC). The maximum power density of Cu(BTC) modified air-cathode MFC was 1772±15mWm, almost 1.8 times higher than the control. BET results disclosed high specific surface area of 2159.7mg and abundant micropores structure. Regular octahedron and porous surface of Cu(BTC) were observed in SEM. XPS testified the existence of divalent copper in the extended 3D frameworks, which importantly acted as the Lewis-acid sites or redox centers in ORR. Additionally, the total resistance decreased by 42% from 17.60 to 10.24Ω compared with bare AC electrode. The rotating disk electrode test results showed a four-electron transfer pathway for Cu(BTC), which was crucial for electrochemical catalytic activity. All the structural and electrochemical advantages make Cu(BTC) a promising catalyst for ORR in MFC.
采用简单的水热法制备了金属有机骨架 Cu(BTC)，并将其用作微生物燃料电池 (MFC) 中的基于氧的催化剂。Cu(BTC)改性空气阴极 MFC 的最大功率密度为 1772±15mWm，几乎是对照的 1.8 倍。BET 结果表明其具有 2159.7mg 的高比表面积和丰富的微孔结构。SEM 观察到了规则的八面体和多孔的 Cu(BTC)表面。XPS 证明了在扩展的 3D 框架中存在二价铜，这在 ORR 中重要地充当了路易斯酸位或氧化还原中心。此外，与裸 AC 电极相比，总电阻从 17.60 降低到 10.24Ω，降低了 42%。旋转圆盘电极测试结果表明，Cu(BTC)具有四电子转移途径，这对电化学催化活性至关重要。所有结构和电化学优势使 Cu(BTC)成为 MFC 中 ORR 的一种很有前途的催化剂。
