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Zhang T, Yu C, Zhu X, Yang Y, Ye D, Chen R, Liao Q. Elimination of Fuel Crossover in a Single-Flow Microfluidic Fuel Cell with a Selective Catalytic Cathode. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tong Zhang
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Chuhe Yu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Xun Zhu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Yang Yang
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Dingding Ye
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Rong Chen
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Qiang Liao
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, No. 174 Shazheng Street, Shapingba District, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
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Liu C, Sun C, Gao Y, Lan W, Chen S. Improving the Electrochemical Properties of Carbon Paper as Cathodes for Microfluidic Fuel Cells by the Electrochemical Activation in Different Solutions. ACS OMEGA 2021; 6:19153-19161. [PMID: 34337253 PMCID: PMC8320087 DOI: 10.1021/acsomega.1c02507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/30/2021] [Indexed: 05/03/2023]
Abstract
Membraneless microfluidic fuel cells (MFCs) have garnered tremendous interest as micropower devices, which exploit the colaminar nature of two aqueous electrolytes to separate the anode and cathode and avoid the membrane usually used in a fuel cell. Our previous research shows that the performance of FeCl3-based MFCs with catalyst-free cathodes is mainly limited by the cathode. To improve the power output of these MFCs, we activated the carbon paper cathode by an electrochemical method in the three solutions (Na2SO4, NaOH, and H2SO4) to improve the electrochemical characteristics of the carbon paper cathode. The surface functionalities and defects, reduction activation of iron ions as the oxidant, cathode resistance, and performance of FeCl3-based MFCs were measured and compared. Our work shows that the electrochemical activation of the carbon paper in different solutions is a simple and effective method to enhance the electrochemical characteristics of the carbon paper cathode and improve the performance of the FeCl3-based MFC. Also, the MFC with the carbon paper cathode activated in the H2SO4 solution reaches the optimum performance: 235.6 mW cm-3 in volumetric power density and 1063.33 mA cm-3 in volumetric limiting current density, which are 1.58 and 1.52 times as much as that of a MFC with an untreated carbon paper cathode, respectively. This best performance can be attributed to the cathode activated in the H2SO4 solution with the largest number of oxygen-containing functional groups, the largest electrochemical active surface area, strongest reduction of iron ions, and least resistance of the cathode.
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Affiliation(s)
- Chunmei Liu
- Institute
of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China
| | - Canxing Sun
- Institute
of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China
| | - Yanjun Gao
- Institute
of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China
| | - Weijuan Lan
- Institute
of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China
| | - Shaowei Chen
- Department
of Chemistry and Biochemistry, University
of California, 1156 High Street, Santa Cruz, California 95064, United States
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