2023
DOI: 10.1021/acsanm.2c04945
|View full text |Cite
|
Sign up to set email alerts
|

Design and Performance Enhancement of Cobalt-Encapsulated Nitrogen-Doped Carbon Nanofiber Electrocatalyst through Ionic Liquid Modification for Efficient Oxygen Reduction

Abstract: The design of platinum-group-metal-free (PGM-free) electrocatalysts with appreciable activity and durability toward the oxygen reduction reaction (ORR) in acidic environments is a big challenge. Here, we report an efficient oxygen reduction activity of a Co-encapsulated nitrogen-doped carbon with nanofiber networks and its ionic liquid-modified interface in an acidic medium. The robust structure of the nanofibers embedded on a rigid framework derived from a zeolitic imidazole framework (ZIF-67) delivers promis… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
8
0

Year Published

2023
2023
2024
2024

Publication Types

Select...
7

Relationship

5
2

Authors

Journals

citations
Cited by 7 publications
(8 citation statements)
references
References 76 publications
0
8
0
Order By: Relevance
“…45,46 The high-resolution N 1s spectra further evidence the existence of pyridinic-N (398.1 eV), M−N x (399.7 eV), pyrrolic-N (400.9 eV), graphitic-N (401.6 eV), and pyridinic-N oxide (403.5 eV) type nitrogen in the catalyst (Figure S11b). 38,46 The deconvoluted Zn 2p and Y 3d XPS spectra illustrate the positive oxidation state of the respective elements with Zn 2p 3/2 and Y 3d 3/2 peaks shifted to 1021.4 and 159.9 eV, respectively, in comparison to their metallic states (Figure S11c,d). 38,40 This can be attributed to the existence of metal− nitrogen coordination.…”
Section: ■ Results and Discussionmentioning
confidence: 85%
“…45,46 The high-resolution N 1s spectra further evidence the existence of pyridinic-N (398.1 eV), M−N x (399.7 eV), pyrrolic-N (400.9 eV), graphitic-N (401.6 eV), and pyridinic-N oxide (403.5 eV) type nitrogen in the catalyst (Figure S11b). 38,46 The deconvoluted Zn 2p and Y 3d XPS spectra illustrate the positive oxidation state of the respective elements with Zn 2p 3/2 and Y 3d 3/2 peaks shifted to 1021.4 and 159.9 eV, respectively, in comparison to their metallic states (Figure S11c,d). 38,40 This can be attributed to the existence of metal− nitrogen coordination.…”
Section: ■ Results and Discussionmentioning
confidence: 85%
“…The defect sites formed due to N-doping are known to facilitate O 2 adsorption in the electrocatalytic ORR. [37][38][39] The N 2 adsorption-desorption isotherms and pore size distribution curves of the Mn-N-C catalysts reveal the presence of large surface areas with micro-and mesoporous structures (Fig. 2c and d).…”
Section: Preparation and Characterizationmentioning
confidence: 96%
“…The larger intensity ratio ( I D / I G ) of Co–N–C-0.02 with a higher Co content and N doping suggests that the atomic dispersion of Co is conducive to the formation of a disordered carbon structure . The defect sites are known to provide catalytic active centers for O 2 adsorption toward enhanced catalytic activity. , The N 2 adsorption–desorption isotherms and pore size distribution of the catalysts show similar surface area and the existence of both micro- and mesopores over a broad range (Figure S13c,d). The specific surface area, estimated by the Brunauer–Emmett–Teller (BET) method and total pore volume ranges between 411–493 m 2 /g and 1.49–1.60 cm 3 /g, respectively (Table S3).…”
Section: Resultsmentioning
confidence: 99%