Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2
© 2018 Elsevier B.V. Supported single atom catalysts (SACs), emerging as a new class of catalytic materials, have been attracting increasing interests. Here we developed a Ni SAC on microwave exfoliated graphene oxide (Ni-N-MEGO) to achieve single atom loading of ~6.9 wt%, significantly higher than...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Elsevier BV
2019
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| Online Access: | http://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/73310 |
| _version_ | 1848762980186980352 |
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| author | Cheng, Y. Zhao, S. Li, H. He, S. Veder, Jean-Pierre Johannessen, B. Xiao, J. Lu, S. Pan, J. Chisholm, M. Yang, S. Liu, C. Chen, J. Jiang, San Ping |
| author_facet | Cheng, Y. Zhao, S. Li, H. He, S. Veder, Jean-Pierre Johannessen, B. Xiao, J. Lu, S. Pan, J. Chisholm, M. Yang, S. Liu, C. Chen, J. Jiang, San Ping |
| author_sort | Cheng, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018 Elsevier B.V. Supported single atom catalysts (SACs), emerging as a new class of catalytic materials, have been attracting increasing interests. Here we developed a Ni SAC on microwave exfoliated graphene oxide (Ni-N-MEGO) to achieve single atom loading of ~6.9 wt%, significantly higher than previously reported SACs. The atomically dispersed Ni atoms, stabilized by coordination with nitrogen, were found to be predominantly anchored along the edges of nanopores (< 6 nm) using a combination of X-ray absorption spectroscopy (XAS) and aberration-corrected scanning transmission electron microscopy (AC-STEM). The Ni-N-MEGO exhibits an onset overpotential of 0.18 V, and a current density of 53.6 mA mg-1 at overpotential of 0.59 V for CO2 reduction reaction (CO2RR), representing one of the best non-precious metal SACs reported so far in the literature. Density functional theory (DFT) calculations suggest that the electrochemical CO2-to-CO conversion occurs more readily on the edge-anchored unsaturated nitrogen coordinated Ni single atoms that lead to enhanced activity toward CO2RR. |
| first_indexed | 2025-11-14T10:56:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-73310 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:56:11Z |
| publishDate | 2019 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-733102022-10-12T07:17:59Z Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 Cheng, Y. Zhao, S. Li, H. He, S. Veder, Jean-Pierre Johannessen, B. Xiao, J. Lu, S. Pan, J. Chisholm, M. Yang, S. Liu, C. Chen, J. Jiang, San Ping © 2018 Elsevier B.V. Supported single atom catalysts (SACs), emerging as a new class of catalytic materials, have been attracting increasing interests. Here we developed a Ni SAC on microwave exfoliated graphene oxide (Ni-N-MEGO) to achieve single atom loading of ~6.9 wt%, significantly higher than previously reported SACs. The atomically dispersed Ni atoms, stabilized by coordination with nitrogen, were found to be predominantly anchored along the edges of nanopores (< 6 nm) using a combination of X-ray absorption spectroscopy (XAS) and aberration-corrected scanning transmission electron microscopy (AC-STEM). The Ni-N-MEGO exhibits an onset overpotential of 0.18 V, and a current density of 53.6 mA mg-1 at overpotential of 0.59 V for CO2 reduction reaction (CO2RR), representing one of the best non-precious metal SACs reported so far in the literature. Density functional theory (DFT) calculations suggest that the electrochemical CO2-to-CO conversion occurs more readily on the edge-anchored unsaturated nitrogen coordinated Ni single atoms that lead to enhanced activity toward CO2RR. 2019 Journal Article http://hdl.handle.net/20.500.11937/73310 10.1016/j.apcatb.2018.10.046 http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP180100568 http://purl.org/au-research/grants/arc/DP180100731 Elsevier BV restricted |
| spellingShingle | Cheng, Y. Zhao, S. Li, H. He, S. Veder, Jean-Pierre Johannessen, B. Xiao, J. Lu, S. Pan, J. Chisholm, M. Yang, S. Liu, C. Chen, J. Jiang, San Ping Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title | Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title_full | Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title_fullStr | Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title_full_unstemmed | Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title_short | Unsaturated edge-anchored Ni single atoms on porous microwave exfoliated graphene oxide for electrochemical CO2 |
| title_sort | unsaturated edge-anchored ni single atoms on porous microwave exfoliated graphene oxide for electrochemical co2 |
| url | http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/73310 |