Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte
Abstract A facile yet robust synthesis is reported herein to simultaneously incorporate atomically dispersed Co‐Nx sites with graphitic layer‐protected Co9S8 nanoparticles (denoted as Co SACs+Co9S8) as an efficient electrocatalyst for oxygen reduction in acidic solution. The Co SACs+Co9S8 catalyst s...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2023-06-01
|
| Series: | ChemElectroChem |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/celc.202300110 |
| _version_ | 1797802617550667776 |
|---|---|
| author | Dr. Jun Wu Mengjun Gong Wuyi Zhang Dr. Asad Mehmood Prof. Jinfeng Zhang Dr. Ghulam Ali Prof. Dr. Anthony Kucernak |
| author_facet | Dr. Jun Wu Mengjun Gong Wuyi Zhang Dr. Asad Mehmood Prof. Jinfeng Zhang Dr. Ghulam Ali Prof. Dr. Anthony Kucernak |
| author_sort | Dr. Jun Wu |
| collection | DOAJ |
| description | Abstract A facile yet robust synthesis is reported herein to simultaneously incorporate atomically dispersed Co‐Nx sites with graphitic layer‐protected Co9S8 nanoparticles (denoted as Co SACs+Co9S8) as an efficient electrocatalyst for oxygen reduction in acidic solution. The Co SACs+Co9S8 catalyst shows low H2O2 selectivity (∼5 %) with high half‐wave potential (E1/2) of ∼0.78 VRHE in 0.5 M H2SO4. The atomic sites of the catalyst were quantified by a nitrite stripping method and the corresponding site density of the catalyst is calculated to be 3.2×1018 sites g−1. Besides, we also found the presence of a reasonable amount of Co9S8 nanoparticles is beneficial for the oxygen electrocatalysis. Finally, the catalyst was assembled into a membrane electrode assembly (MEA) for evaluating its performance under more practical conditions in proton exchange membrane fuel cell (PEMFC) system. |
| first_indexed | 2024-03-13T05:09:23Z |
| format | Article |
| id | doaj.art-e6082ab47ad54fbe837cc49bf888cc60 |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-03-13T05:09:23Z |
| publishDate | 2023-06-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-e6082ab47ad54fbe837cc49bf888cc602023-06-16T06:01:46ZengWiley-VCHChemElectroChem2196-02162023-06-011012n/an/a10.1002/celc.202300110Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic ElectrolyteDr. Jun Wu0Mengjun Gong1Wuyi Zhang2Dr. Asad Mehmood3Prof. Jinfeng Zhang4Dr. Ghulam Ali5Prof. Dr. Anthony Kucernak6Department of Chemistry Imperial College London White City Campus London W12 0BZ United KingdomDepartment of Chemistry Imperial College London White City Campus London W12 0BZ United KingdomDepartment of Chemistry Imperial College London White City Campus London W12 0BZ United KingdomDepartment of Chemistry Imperial College London White City Campus London W12 0BZ United KingdomSchool of Materials Science and Engineering Tianjin University Tianjin 300072 ChinaUS-Pakistan Center for Advanced Studies in Energy (USPCASE) Pakistan National University of Science and Technology (NUST) H-12 Islamabad 44000 PakistanDepartment of Chemistry Imperial College London White City Campus London W12 0BZ United KingdomAbstract A facile yet robust synthesis is reported herein to simultaneously incorporate atomically dispersed Co‐Nx sites with graphitic layer‐protected Co9S8 nanoparticles (denoted as Co SACs+Co9S8) as an efficient electrocatalyst for oxygen reduction in acidic solution. The Co SACs+Co9S8 catalyst shows low H2O2 selectivity (∼5 %) with high half‐wave potential (E1/2) of ∼0.78 VRHE in 0.5 M H2SO4. The atomic sites of the catalyst were quantified by a nitrite stripping method and the corresponding site density of the catalyst is calculated to be 3.2×1018 sites g−1. Besides, we also found the presence of a reasonable amount of Co9S8 nanoparticles is beneficial for the oxygen electrocatalysis. Finally, the catalyst was assembled into a membrane electrode assembly (MEA) for evaluating its performance under more practical conditions in proton exchange membrane fuel cell (PEMFC) system.https://doi.org/10.1002/celc.202300110Heteroatom DopingElectrocatalysisFuel CellsOxygen ReductionSingle Atom Catalysts |
| spellingShingle | Dr. Jun Wu Mengjun Gong Wuyi Zhang Dr. Asad Mehmood Prof. Jinfeng Zhang Dr. Ghulam Ali Prof. Dr. Anthony Kucernak Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte ChemElectroChem Heteroatom Doping Electrocatalysis Fuel Cells Oxygen Reduction Single Atom Catalysts |
| title | Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte |
| title_full | Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte |
| title_fullStr | Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte |
| title_full_unstemmed | Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte |
| title_short | Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte |
| title_sort | simultaneously incorporating atomically dispersed co nx sites with graphitic carbon layer wrapped co9s8 nanoparticles for oxygen reduction in acidic electrolyte |
| topic | Heteroatom Doping Electrocatalysis Fuel Cells Oxygen Reduction Single Atom Catalysts |
| url | https://doi.org/10.1002/celc.202300110 |
| work_keys_str_mv | AT drjunwu simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT mengjungong simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT wuyizhang simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT drasadmehmood simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT profjinfengzhang simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT drghulamali simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte AT profdranthonykucernak simultaneouslyincorporatingatomicallydispersedconxsiteswithgraphiticcarbonlayerwrappedco9s8nanoparticlesforoxygenreductioninacidicelectrolyte |