LAPSE:2022.0019
Published Article
LAPSE:2022.0019
Morphology and Structure Controls of Single-Atom Fe−N−C Catalysts Synthesized Using FePc Powders as the Precursor
Ning Yan, Fan Liu, Xu Meng, Meng Qin, Guangqi Zhu, Luxia Bu, Zigeng Liu, Wei Wang
January 24, 2022
Understanding the origin of the high electrocatalytic activity of Fe−N−C electrocatalysts for oxygen reduction reaction is critical but still challenging for developing efficient sustainable nonprecious metal catalysts used in fuel cells. Although there are plenty of papers concerning the morphology on the surface Fe−N−C catalysts, there is very little work discussing how temperature and pressure control the growth of nanoparticles. In our lab, a unique organic vapor deposition technology was developed to investigate the effect of the temperature and pressure on catalysts. The results indicated that synthesized catalysts exhibited three kinds of morphology—nanorods, nanofibers, and nanogranules—corresponding to different synthesis processes. The growth of the crystal is the root cause of the difference in the surface morphology of the catalyst, which can reasonably explain the effect of the temperature and pressure. The oxygen reduction reaction current densities of the different catalysts at potential 0.88 V increased in the following order: FePc (1.04 mA/cm2) < Pt/C catalyst (1.54 mA/cm2) ≈ Fe−N−C-f catalyst (1.64 mA/cm2) < Fe−N−C-g catalyst (2.12 mA/cm2) < Fe−N−C-r catalyst (2.35 mA/cm2). By changing the morphology of the catalyst surface, this study proved that the higher performance of the catalysts can be obtained.
Keywords
Fe–N–C, morphology, ORR
Suggested Citation
Yan N, Liu F, Meng X, Qin M, Zhu G, Bu L, Liu Z, Wang W. Morphology and Structure Controls of Single-Atom Fe−N−C Catalysts Synthesized Using FePc Powders as the Precursor. (2022). LAPSE:2022.0019
Author Affiliations
Yan N: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Liu F: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Meng X: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Qin M: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Zhu G: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Bu L: Department of Applied Chemistry, College of Basic Science, Tianjin Agricultural University, Tianjin 300384, China
Liu Z: Forschungszentrum Jülich, IEK-9, 52425 Jülich, Germany
Wang W: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Journal Name
Processes
Volume
9
Issue
1
First Page
pr9010109
Year
2021
Publication Date
2021-01-07
Published Version
ISSN
2227-9717
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PII: pr9010109, Publication Type: Journal Article
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LAPSE:2022.0019
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doi:10.3390/pr9010109
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Jan 24, 2022
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Jan 24, 2022
 
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Calvin Tsay
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