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Sabhapathy P, Raghunath P, Sabbah A, Shown I, Bayikadi KS, Xie RK, Krishnamoorthy V, Lin MC, Chen KH, Chen LC. Axial Chlorine Induced Electron Delocalization in Atomically Dispersed FeN4 Electrocatalyst for Oxygen Reduction Reaction with Improved Hydrogen Peroxide Tolerance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303598. [PMID: 37434392 DOI: 10.1002/smll.202303598] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/02/2023] [Indexed: 07/13/2023]
Abstract
Atomically dispersed iron sites on nitrogen-doped carbon (Fe-NC) are the most active Pt-group-metal-free catalysts for oxygen reduction reaction (ORR). However, due to oxidative corrosion and the Fenton reaction, Fe-NC catalysts are insufficiently active and stable. Herein, w e demonstrated that the axial Cl-modified Fe-NC (Cl-Fe-NC) electrocatalyst is active and stable for the ORR in acidic conditions with high H2 O2 tolerance. The Cl-Fe-NC exhibits excellent ORR activity, with a high half-wave potential (E1/2 ) of 0.82 V versus a reversible hydrogen electrode (RHE), comparable to Pt/C (E1/2 = 0.85 V versus RHE) and better than Fe-NC (E1/2 = 0.79 V versus RHE). X-ray absorption spectroscopy analysis confirms that chlorine is axially integrated into the FeN4. More interestingly, compared to Fe-NC, the Fenton reaction is markedly suppressed in Cl-Fe-NC. In situ electrochemical impedance spectroscopy reveals that Cl-Fe-NC provides efficient electron transfer and faster reaction kinetics than Fe-NC. Density functional theory calculations reveal that incorporating Cl into FeN4 can drive the electron density delocalization of the FeN4 site, leading to a moderate adsorption free energy of OH* (∆GOH* ), d-band center, and a high onset potential, and promotes the direct four-electron-transfer ORR with weak H2 O2 binding ability compared to Cl-free FeN4, indicating superior intrinsic ORR activity.
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Affiliation(s)
- Palani Sabhapathy
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Puttikam Raghunath
- Department of Applied Chemistry, National Yang-Ming Chiao-Tung University, Hsinchu, 30010, Taiwan
| | - Amr Sabbah
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
- Tabbin Institute for Metallurgical Studies, Tabbin, Helwan 109, Cairo, 11421, Egypt
| | - Indrajit Shown
- Department of Chemistry, Hindustan Institute of Technology and Sciences, Chennai, 603103, India
| | | | - Rui-Kun Xie
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Vimal Krishnamoorthy
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan
| | - Ming-Chang Lin
- Department of Applied Chemistry, National Yang-Ming Chiao-Tung University, Hsinchu, 30010, Taiwan
| | - Kuei-Hsien Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Li-Chyong Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
- Center of Atomic Initiative for New Materials, National Taiwan University, Taipei, 10617, Taiwan
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
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Kumar A, Kumar Das D, Kishore Sharma R, Selvaraj M, A. Assiri M, Ajmal S, Zhang G, Gupta RK, Yasin G. Study of Oxygen Reduction Reaction on Binuclear-Phthalocyanine with Fe-Fe, Co-Co, and Fe-Co Dual-Atom-Active Sites using Density Functional Theory. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.03.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Wang Y, Pei C, Wang X, Sun G, Zhao ZJ, Gong J. The role of pentacoordinate Al3+ sites of Pt/Al2O3 catalysts in propane dehydrogenation. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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