Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells
Iron single atom catalysts (Fe SACs) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysi...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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WILEY
2019
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| Online Access: | http://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/90777 |
| _version_ | 1848765424903127040 |
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| author | Cheng, Yi He, Shuai Lu, S. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Saunders, M. Becker, Thomas De Marco, Roland Li, Q. Yang, S.Z. Jiang, San Ping |
| author_facet | Cheng, Yi He, Shuai Lu, S. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Saunders, M. Becker, Thomas De Marco, Roland Li, Q. Yang, S.Z. Jiang, San Ping |
| author_sort | Cheng, Yi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Iron single atom catalysts (Fe SACs) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysis method is reported for the synthesis of iron single atoms on graphene (FeSA-G) with a high Fe SAC loading of ≈7.7 ± 1.3 wt%. The as-synthesized FeSA-G shows an onset potential of 0.950 V and a half-wave potential of 0.804 V in acid electrolyte for the ORR, similar to that of Pt/C catalysts but with a much higher stability and higher phosphate anion tolerance. High temperature SiO 2 nanoparticle-doped phosphoric acid/polybenzimidazole (PA/PBI/SiO 2 ) composite membrane cells utilizing a FeSA-G cathode with Fe SAC loading of 0.3 mg cm −2 delivers a peak power density of 325 mW cm −2 at 230 °C, better than 313 mW cm −2 obtained on the cell with a Pt/C cathode at a Pt loading of 1 mg cm −2 . The cell with FeSA-G cathode exhibits superior stability at 230 °C, as compared to that with Pt/C cathode. Our results provide a new approach to developing practical NPM catalysts to replace Pt-based catalysts for fuel cells. |
| first_indexed | 2025-11-14T11:35:02Z |
| format | Journal Article |
| id | curtin-20.500.11937-90777 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:35:02Z |
| publishDate | 2019 |
| publisher | WILEY |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-907772023-04-19T08:15:13Z Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells Cheng, Yi He, Shuai Lu, S. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Saunders, M. Becker, Thomas De Marco, Roland Li, Q. Yang, S.Z. Jiang, San Ping Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science high loading high temperature polymer electrolyte membrane fuel cells iron single atom catalysts nonprecious metal catalysts oxygen reduction reaction OXYGEN REDUCTION ORR CATALYST ELECTROCATALYSTS PERFORMANCE SITES PHOSPHATE IDENTIFICATION ADSORPTION ALKALINE CARBON Iron single atom catalysts (Fe SACs) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysis method is reported for the synthesis of iron single atoms on graphene (FeSA-G) with a high Fe SAC loading of ≈7.7 ± 1.3 wt%. The as-synthesized FeSA-G shows an onset potential of 0.950 V and a half-wave potential of 0.804 V in acid electrolyte for the ORR, similar to that of Pt/C catalysts but with a much higher stability and higher phosphate anion tolerance. High temperature SiO 2 nanoparticle-doped phosphoric acid/polybenzimidazole (PA/PBI/SiO 2 ) composite membrane cells utilizing a FeSA-G cathode with Fe SAC loading of 0.3 mg cm −2 delivers a peak power density of 325 mW cm −2 at 230 °C, better than 313 mW cm −2 obtained on the cell with a Pt/C cathode at a Pt loading of 1 mg cm −2 . The cell with FeSA-G cathode exhibits superior stability at 230 °C, as compared to that with Pt/C cathode. Our results provide a new approach to developing practical NPM catalysts to replace Pt-based catalysts for fuel cells. 2019 Journal Article http://hdl.handle.net/20.500.11937/90777 10.1002/advs.201802066 English http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP180100568 http://purl.org/au-research/grants/arc/DP180100731 http://purl.org/au-research/grants/arc/LE120100026 http://creativecommons.org/licenses/by/4.0/ WILEY fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science high loading high temperature polymer electrolyte membrane fuel cells iron single atom catalysts nonprecious metal catalysts oxygen reduction reaction OXYGEN REDUCTION ORR CATALYST ELECTROCATALYSTS PERFORMANCE SITES PHOSPHATE IDENTIFICATION ADSORPTION ALKALINE CARBON Cheng, Yi He, Shuai Lu, S. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Saunders, M. Becker, Thomas De Marco, Roland Li, Q. Yang, S.Z. Jiang, San Ping Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title | Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title_full | Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title_fullStr | Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title_full_unstemmed | Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title_short | Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High-Temperature Polymer Electrolyte Membrane Fuel Cells |
| title_sort | iron single atoms on graphene as nonprecious metal catalysts for high-temperature polymer electrolyte membrane fuel cells |
| topic | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science high loading high temperature polymer electrolyte membrane fuel cells iron single atom catalysts nonprecious metal catalysts oxygen reduction reaction OXYGEN REDUCTION ORR CATALYST ELECTROCATALYSTS PERFORMANCE SITES PHOSPHATE IDENTIFICATION ADSORPTION ALKALINE CARBON |
| 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://purl.org/au-research/grants/arc/DP150102044 http://hdl.handle.net/20.500.11937/90777 |