Volume 46, Issue 10 pp. 13820-13831
RESEARCH ARTICLE

Ultralow loading FeCoNi alloy nanoparticles decorated carbon mat for hydrogen peroxide reduction reaction and its application in direct ethylene glycol fuel cells

Zhefei Pan

Zhefei Pan

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

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Zhewei Zhang

Zhewei Zhang

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

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Abdullah Tahir

Abdullah Tahir

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

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Oladapo Christopher Esan

Oladapo Christopher Esan

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

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Xinhua Liu

Corresponding Author

Xinhua Liu

School of Transportation Science and Engineering, Beihang University, Beijing, China

Correspondence

Xinhua Liu, School of Transportation Science and Engineering, Beihang University, Kejiyuan Road, Haidian, Beijing 100083, China.

Email: [email protected]

Huizhi Wang, Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.

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Liang An, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.

Email: [email protected]

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Huizhi Wang

Corresponding Author

Huizhi Wang

Department of Mechanical Engineering, Imperial College London, London, UK

Correspondence

Xinhua Liu, School of Transportation Science and Engineering, Beihang University, Kejiyuan Road, Haidian, Beijing 100083, China.

Email: [email protected]

Huizhi Wang, Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.

Email: [email protected]

Liang An, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.

Email: [email protected]

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Liang An

Corresponding Author

Liang An

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

Correspondence

Xinhua Liu, School of Transportation Science and Engineering, Beihang University, Kejiyuan Road, Haidian, Beijing 100083, China.

Email: [email protected]

Huizhi Wang, Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.

Email: [email protected]

Liang An, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.

Email: [email protected]

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First published: 17 May 2022
Citations: 9

Funding information: National Natural Science Foundation of China, Grant/Award Number: 52022003

Summary

Hydrogen peroxide has been an attractive oxidant in direct liquid fuel cells. However, hydrogen peroxide reduction reaction heavily relies on noble metal-based electrocatalysts. In this work, a carbon mat decorated with FeCoNi alloy nanoparticles (namely FeCoNi/CM) of an ultralow loading, that is, 0.146 mg cm−2, for hydrogen peroxide reduction is designed, fabricated, and applied as a free-standing cathode in a passive alkaline-acid direct ethylene glycol fuel cell. A piece of Pd/C coated carbon cloth (1.0 mg cm−2) is used as the anode and a pre-treated Nafion 211 membrane as the membrane. This passive fuel cell yields a peak power density of 17.4 mW cm−2 at 23°C, which is comparable to an Au/C-based cathode (17.0 mW cm−2). The new electrode shows significantly enhanced mass transfer and allows a current density of 60.0 mA cm−2, which is 1.5 times the value achieved with the Au/C-based cathode. This can be attributed to the much thinner thickness of FeCoNi/CM (50.0 μm) than Au/C-based cathode (380.0 μm). With the thinner thickness, the oxygen derived from the self-decomposition of hydrogen peroxide can be effectively removed from the cathode, which is beneficial for the transport of hydrogen peroxide to the catalyst surface. Moreover, with the use of this free-standing cathode, the passive fuel cell attains a continuous operation at a constant discharging current of 20.0 mA for more than 9 h, exceeding the 5 h achieved with the Au/C-based cathode at the same discharging current density.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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