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Author:

Yan, Lina (Yan, Lina.) | Wang, Chao (Wang, Chao.) | Wang, Yueshuai (Wang, Yueshuai.) | Wang, Yahui (Wang, Yahui.) | Wang, Zhaozhao (Wang, Zhaozhao.) | Zheng, Lirong (Zheng, Lirong.) | Lu, Yue (Lu, Yue.) (Scholars:卢岳) | Wang, Ruzhi (Wang, Ruzhi.) | Chen, Ge (Chen, Ge.)

Indexed by:

EI Scopus SCIE

Abstract:

Electrochemical production of hydrogen peroxide (H2O2) is a sustainable and environmentally benign process. The electrochemical oxygen reduction process (ORR) via a two electron pathway (2e- ORR) offers a practical method for on-site H2O2 generation. As an earth-abundant catalyst, the cobalt-nitrogen coordinated systems integrated into the carbon matrix (Co-NC) has caused wide attention for its high activity in 2e- ORR. Even though most of the reported Co-NC catalysts have classical planar Co-N4 coordination, axial coordination engineering has recently emerged as an effective way to control the active sites in the axial direction by using different coordination ligands. The structure-function link between the Co-N configuration of non-planar coordination and 2e- ORR activity is, however, not fully understood. An axial-N coordinated Co-N5 motif embedded in hierarchically porous graphite-3R carbon (Co-N5C) was effectively synthesized using a template-sacrificing method. The Co-N5C has a high selectivity for 2e- ORR and a high H2O2 molar production rate of up to 6.78 mol peroxide/ gcatalyst/h in acidic media, both of which are better than its Co-N4 counterpart. DFT analyses demonstrate that axial-N ligands regulated the d-band center of the Co atom in the Co-N5C catalyst, inducing a shift in & UDelta;G*OOH near the Sabatier volcano plot's peak (& UDelta;G*OOH = 4.22 eV). This optimized the binding of the *OOH intermediate and then enhanced the protonation of *OOH to produce H2O2 more efficiently.

Keyword:

Template-sacrificing strategy Hydrogen peroxide ORR Active site density Axial-N

Author Community:

  • [ 1 ] [Yan, Lina]Beijing Univ Technol, Fac Environm & Life, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Yahui]Beijing Univ Technol, Fac Environm & Life, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 3 ] [Chen, Ge]Beijing Univ Technol, Fac Environm & Life, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Chao]Beijing Univ Technol, Inst Adv Energy Mat & Devices, Fac Mat & Mfg, Key Lab Adv Funct Mat Educ,Minist China, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Ruzhi]Beijing Univ Technol, Inst Adv Energy Mat & Devices, Fac Mat & Mfg, Key Lab Adv Funct Mat Educ,Minist China, Beijing 100124, Peoples R China
  • [ 6 ] [Wang, Yueshuai]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solids, Beijing 100124, Peoples R China
  • [ 7 ] [Lu, Yue]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solids, Beijing 100124, Peoples R China
  • [ 8 ] [Wang, Zhaozhao]Hebei Univ Engn, Hebei Technol Innovat Ctr Water Pollut Control & W, Sch Energy & Environm Engn, Handan 056038, Peoples R China
  • [ 9 ] [Zheng, Lirong]Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

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Source :

APPLIED CATALYSIS B-ENVIRONMENTAL

ISSN: 0926-3373

Year: 2023

Volume: 338

2 2 . 1 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:20

Cited Count:

WoS CC Cited Count: 30

SCOPUS Cited Count: 29

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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