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Author:

Wei, Shengjie (Wei, Shengjie.) | Li, Lei (Li, Lei.) | Li, Ang (Li, Ang.) | Zhang, Lei (Zhang, Lei.) | Hu, Haibo (Hu, Haibo.) | Pang, Dawei (Pang, Dawei.) | Zhang, Qinghua (Zhang, Qinghua.) | Xiao, Hai (Xiao, Hai.) | Chen, Wenxing (Chen, Wenxing.)

Indexed by:

EI Scopus SCIE

Abstract:

Designing atomic defects engineering is significant for boosting the activity of metal catalytic sites. Herein, we constructed Fe-N4 sites on defective N-doped carbon catalyst (Fe-N4/def-CN) by in-situ ZnO thermal etching strategy. Compared with defect-free Fe-N4/CN, Fe-N4/def-CN had a half-wave potential (E1/2) of 0.920 V vs RHE for alkaline ORR with 50 mV increasing. We directly observed the ZnO in-situ disappearance, studied ZnO thermal etching effect on CN substrate and revealed the mechanism of carbon defect formation by in-situ envi-ronmental transmission electron microscopy (ETEM) and in-situ X-ray diffraction (XRD) measurements. Density functional theory (DFT) calculations demonstrated the easier formation of double carbon-atoms defects adjacent to Fe-N4 sites. The carbon-atoms defects and Zn-atom vacancies synergistically improved the ORR activity of Fe -N4 sites. This work provides a atomic-level insight to optimize the atomic defects engineering of metal-N4 sites, such as carbon-atoms defects and metal-atoms vacancies by in-situ ZnO thermal etching strategy.

Keyword:

In -situ ZnO thermal etching Zn-air battery Atomic defects engineering Oxygen reduction Single -atom sites

Author Community:

  • [ 1 ] [Wei, Shengjie]Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
  • [ 2 ] [Wei, Shengjie]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
  • [ 3 ] [Xiao, Hai]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
  • [ 4 ] [Li, Lei]Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
  • [ 5 ] [Li, Ang]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 6 ] [Pang, Dawei]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 7 ] [Zhang, Lei]Anhui Univ, Sch Mat Sci & Engn, Key Lab Struct & Funct Regulat Hybrid Mat, Minist Educ, Hefei 230601, Peoples R China
  • [ 8 ] [Hu, Haibo]Anhui Univ, Sch Mat Sci & Engn, Key Lab Struct & Funct Regulat Hybrid Mat, Minist Educ, Hefei 230601, Peoples R China
  • [ 9 ] [Zhang, Qinghua]Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
  • [ 10 ] [Chen, Wenxing]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Mat, Beijing 100081, Peoples R China

Reprint Author's Address:

  • [Wei, Shengjie]Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China;;[Wei, Shengjie]Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China;;[Chen, Wenxing]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Construct Tailorable Adv Funct Mat, Beijing 100081, Peoples R China;;

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Source :

CHEMICAL ENGINEERING JOURNAL

ISSN: 1385-8947

Year: 2023

Volume: 465

1 5 . 1 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:19

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 21

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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