Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions
A metal-organic framework (MOF) seed-mediated deposition route is developed to synthesize MOF/graphene oxide (GO)/MOF nano-sandwiches with core-shell structured MOF (i.e. ZIF-8@ZIF-67) crystals uniformly distributed on GO. Due to the well controllable growth rate, ZIF-8 seeds are first deposited on...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
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R S C Publications
2017
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| Online Access: | http://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/56977 |
| _version_ | 1848759984266936320 |
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| author | Wei, J. Hu, Y. Liang, Y. Kong, B. Zheng, Z. Zhang, J. Jiang, San Ping Zhao, Y. Wang, H. |
| author_facet | Wei, J. Hu, Y. Liang, Y. Kong, B. Zheng, Z. Zhang, J. Jiang, San Ping Zhao, Y. Wang, H. |
| author_sort | Wei, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A metal-organic framework (MOF) seed-mediated deposition route is developed to synthesize MOF/graphene oxide (GO)/MOF nano-sandwiches with core-shell structured MOF (i.e. ZIF-8@ZIF-67) crystals uniformly distributed on GO. Due to the well controllable growth rate, ZIF-8 seeds are first deposited on GO. Then, ZIF-67 species are selectively deposited on the surface of ZIF-8 to form core-shell structures owing to their similar crystal structure and unit cell parameter. Compared with the direct deposition of ZIF-67 crystals on GO, this MOF seed-mediated synthesis can effectively prevent the over-growth and inhomogeneous distribution of ZIF-67 crystals. The GO/core-shell MOF composites are further demonstrated to be an excellent precursor for cobalt/N-doped carbon nanosheets, which are efficient nonprecious metal catalysts for oxygen reduction reactions, and exhibit a high onset potential (~0.93 V versus reversible hydrogen electrode, vs. the RHE) and large kinetic current density (~101 mA mg -1 at 0.80 V vs. the RHE). Such novel carbon materials derived from the core-shell structured MOF also show better catalytic performance than those derived from both GO/ZIF-8 and GO/ZIF-67 prepared under the same conditions. This work offers an alternative strategy to develop MOF-derived carbon-based composites using GO/core-shell structured MOFs as a kind of fresh precursors. |
| first_indexed | 2025-11-14T10:08:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-56977 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:08:34Z |
| publishDate | 2017 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-569772022-10-12T07:15:31Z Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions Wei, J. Hu, Y. Liang, Y. Kong, B. Zheng, Z. Zhang, J. Jiang, San Ping Zhao, Y. Wang, H. A metal-organic framework (MOF) seed-mediated deposition route is developed to synthesize MOF/graphene oxide (GO)/MOF nano-sandwiches with core-shell structured MOF (i.e. ZIF-8@ZIF-67) crystals uniformly distributed on GO. Due to the well controllable growth rate, ZIF-8 seeds are first deposited on GO. Then, ZIF-67 species are selectively deposited on the surface of ZIF-8 to form core-shell structures owing to their similar crystal structure and unit cell parameter. Compared with the direct deposition of ZIF-67 crystals on GO, this MOF seed-mediated synthesis can effectively prevent the over-growth and inhomogeneous distribution of ZIF-67 crystals. The GO/core-shell MOF composites are further demonstrated to be an excellent precursor for cobalt/N-doped carbon nanosheets, which are efficient nonprecious metal catalysts for oxygen reduction reactions, and exhibit a high onset potential (~0.93 V versus reversible hydrogen electrode, vs. the RHE) and large kinetic current density (~101 mA mg -1 at 0.80 V vs. the RHE). Such novel carbon materials derived from the core-shell structured MOF also show better catalytic performance than those derived from both GO/ZIF-8 and GO/ZIF-67 prepared under the same conditions. This work offers an alternative strategy to develop MOF-derived carbon-based composites using GO/core-shell structured MOFs as a kind of fresh precursors. 2017 Journal Article http://hdl.handle.net/20.500.11937/56977 10.1039/c7ta00276a http://purl.org/au-research/grants/arc/DP150102044 http://creativecommons.org/licenses/by/3.0/ R S C Publications fulltext |
| spellingShingle | Wei, J. Hu, Y. Liang, Y. Kong, B. Zheng, Z. Zhang, J. Jiang, San Ping Zhao, Y. Wang, H. Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title | Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title_full | Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title_fullStr | Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title_full_unstemmed | Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title_short | Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactions |
| title_sort | graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/n-doped carbon nanosheets for oxygen reduction reactions |
| url | http://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/56977 |