High‐Rate Oxygen Electroreduction over Graphitic‐N Species Exposed on 3D Hierarchically Porous Nitrogen‐Doped Carbons
Abstract
Nitrogen‐doped species (NDs) are theoretically accepted as a determinant of the catalytic activity of metal‐free N‐doped carbon (NC) catalysts for oxygen reduction reaction (ORR). However, direct relationships between ND type and ORR activity have been difficult to extract because the complexity of carbon matrix impairs efforts to expose specific NDs. Herein, we demonstrate the fabrication of a 3D hierarchically porous NC catalyst with micro‐, meso‐, and macroporosity in one structure, in which sufficient exposure and availability of inner‐pore catalytic sites can be achieved due to its super‐high surface area (2191 cm 2 g−1) and interconnected pore system. More importantly, in‐situ formation of graphitic‐N species (GNs) on the surface of NC stimulated by KOH activation enables us to experimentally reveal the catalytic nature of GNs for ORR, which is of great significance for the design and development of advanced metal‐free NC electrocatalysts.
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Compared to SilkNCT obtained at 1050°C, SilkNCT obtained at 900°C contains more N, mostly active pyridinic N and graphitic N, which contribute to high activity toward electrochemical reaction.
“Compared to SilkNCT obtained at 1050°C, SilkNCT obtained at 900°C contains obviously more N, where most of the N is active pyridinic N and graphitic N, which are proved to contribute to high activity toward electrochemical reaction (38, 39).”
From Integrated textile sensor patch for real-time and multiplex sweat analysis (2019) · cites this paper as [38]
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Integrated textile sensor patch for real-time and multiplex sweat analysis
He, W., Wang, C., Wang, H., Jian, M., Lu, W., Liang, X., Zhang, X., Yang, F., & Zhang, Y. (2019) · Science Advances · doi:10.1126/sciadv.aax0649 · Cited by 564 · see citing works
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- Authors
- He, W., Jiang, C., Wang, J., & Lu, L.
- Affiliations
- Chinese Academy of Sciences (CN)
- Changchun University of Technology (CN)
- Corresponding author
- Lu, Lehui
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2014-07-10
- Volume
- 53
- Issue
- 36
- Pages
- 9503-9507
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2161058762
- Cited by
- 386
- References
- 59
- Citations by year
- 2026: 1 · 2025: 8 · 2024: 11 · 2023: 15 · 2022: 27 · 2021: 29 · 2020: 36 · 2019: 43 · 2018: 59 · 2017: 52 · 2016: 56 · 2015: 46 · 2014: 1
- FWCI
- 17.04
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Supercapacitor Materials and Fabrication
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Keywords
- oxygen reduction reaction, nitrogen-doped carbon, metal-free electrocatalysts, hierarchical porous carbon, 3D porous carbon, KOH activation, in situ generation, high surface area
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