A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries
A durable, high-performing and cost-effective bi-functional catalyst toward oxygen reduction/evolution reactions (ORR/OER) is the key towards the practical application of Zn-air batteries (ZABs). Here, we report a new concept of combining pristine and carbonized MOFs for developing a bifunctional el...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2024
|
| Online Access: | http://purl.org/au-research/grants/arc/LP220200920 http://hdl.handle.net/20.500.11937/96137 |
| _version_ | 1848766099214041088 |
|---|---|
| author | Arafat, Yasir Azhar, M.R. Zhong, Yijun Xu, Xiaomin Tadé, Moses Shao, Zongping |
| author_facet | Arafat, Yasir Azhar, M.R. Zhong, Yijun Xu, Xiaomin Tadé, Moses Shao, Zongping |
| author_sort | Arafat, Yasir |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A durable, high-performing and cost-effective bi-functional catalyst toward oxygen reduction/evolution reactions (ORR/OER) is the key towards the practical application of Zn-air batteries (ZABs). Here, we report a new concept of combining pristine and carbonized MOFs for developing a bifunctional electrocatalyst for ZABs, where the pristine MOF acts as a support for the OER catalysts and the carbonized MOF acts as the ORR catalyst and enhances the electronic conductivity. By electroless NiP-plating over the surface of the Fe-containing 3D MOF (MIL-100), the catalyst shows superior activity for the OER, delivering a current density of 10 mA cm−2 at an overpotential of 295 mV together with a low Tafel slope of 62 mV dec−1. A 3D porous MOF serves as a substrate for growing NiP with maximal exposed active sites and the iron in the MOF interacts with NiP to further boost the intrinsic OER activity. Subsequently, we introduce carbonized ZIF-67 (C-ZIF-67) into NiP-MIL-100 to build a bifunctional catalyst, where C-ZIF-67 not only provides ORR catalytic activity but also creates a synergetic effect with NiP-MIL-100, and to expedite the charge/mass transfer. Using this air electrode for ZABs, an excellent bifunctionality with a small potential gap (0.78 V), a high peak power density (203 mW cm−2) and robust cycling over a period of 500 h were achieved. |
| first_indexed | 2025-11-14T11:45:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-96137 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:45:45Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-961372024-11-07T01:24:33Z A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries Arafat, Yasir Azhar, M.R. Zhong, Yijun Xu, Xiaomin Tadé, Moses Shao, Zongping A durable, high-performing and cost-effective bi-functional catalyst toward oxygen reduction/evolution reactions (ORR/OER) is the key towards the practical application of Zn-air batteries (ZABs). Here, we report a new concept of combining pristine and carbonized MOFs for developing a bifunctional electrocatalyst for ZABs, where the pristine MOF acts as a support for the OER catalysts and the carbonized MOF acts as the ORR catalyst and enhances the electronic conductivity. By electroless NiP-plating over the surface of the Fe-containing 3D MOF (MIL-100), the catalyst shows superior activity for the OER, delivering a current density of 10 mA cm−2 at an overpotential of 295 mV together with a low Tafel slope of 62 mV dec−1. A 3D porous MOF serves as a substrate for growing NiP with maximal exposed active sites and the iron in the MOF interacts with NiP to further boost the intrinsic OER activity. Subsequently, we introduce carbonized ZIF-67 (C-ZIF-67) into NiP-MIL-100 to build a bifunctional catalyst, where C-ZIF-67 not only provides ORR catalytic activity but also creates a synergetic effect with NiP-MIL-100, and to expedite the charge/mass transfer. Using this air electrode for ZABs, an excellent bifunctionality with a small potential gap (0.78 V), a high peak power density (203 mW cm−2) and robust cycling over a period of 500 h were achieved. 2024 Journal Article http://hdl.handle.net/20.500.11937/96137 10.1039/d4ey00008k http://purl.org/au-research/grants/arc/LP220200920 https://creativecommons.org/licenses/by/3.0/ fulltext |
| spellingShingle | Arafat, Yasir Azhar, M.R. Zhong, Yijun Xu, Xiaomin Tadé, Moses Shao, Zongping A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title | A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title_full | A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title_fullStr | A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title_full_unstemmed | A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title_short | A bi-functional air electrode developed from a dual-MOF strategy for high-performance zinc-air batteries |
| title_sort | bi-functional air electrode developed from a dual-mof strategy for high-performance zinc-air batteries |
| url | http://purl.org/au-research/grants/arc/LP220200920 http://hdl.handle.net/20.500.11937/96137 |