First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells
Phosphate poisoning of Pt electrocatalysts is one of the major barriers that constrains the performance of phosphoric acid-doped polybenzimidazole (PA/PBI) membrane fuel cells. Herein, we developed new atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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ELSEVIER
2021
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| Online Access: | http://purl.org/au-research/grants/arc/DP180100568 http://hdl.handle.net/20.500.11937/90808 |
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| author | Cheng, Yi Wang, M. Lu, S. Tang, C. Wu, X. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Zhang, J. Yang, S.Z. Wang, S. Jiang, San Ping |
| author_facet | Cheng, Yi Wang, M. Lu, S. Tang, C. Wu, X. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Zhang, J. Yang, S.Z. Wang, S. Jiang, San Ping |
| author_sort | Cheng, Yi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Phosphate poisoning of Pt electrocatalysts is one of the major barriers that constrains the performance of phosphoric acid-doped polybenzimidazole (PA/PBI) membrane fuel cells. Herein, we developed new atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts. The cell with FeCu/N-CNTs cathodes delivers a peak power density of 302 mWcm−2 at 230℃, similar to that using Pt/C electrocatalysts (1 mgPt cm−2) but with a much better stability. In contrast to phosphate poisoning of Pt/C, FeCu/N-CNTs show PA enhanced activities. DFT calcualtions indicate that phosphate promotion effect results from the stronger binding of phosphate on Cu sites, which decreases the activation energy barrier for the cleavage of the O2 double bond and provides local protons to facilitate the proton-coupled electron transfer ORR. The results also show that FeCu/N-CNTs have a much better activity for ORR as comapre to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. This study demonstrates the promising potential of bimetallic FeCu/N-CNTs as true Pt-free, highly active and durable cathodes for PA/PBI based high temperature polymer electrolyte fuel cells. |
| first_indexed | 2025-11-14T11:35:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-90808 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:35:11Z |
| publishDate | 2021 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-908082023-04-24T00:53:25Z First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells Cheng, Yi Wang, M. Lu, S. Tang, C. Wu, X. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Zhang, J. Yang, S.Z. Wang, S. Jiang, San Ping Science & Technology Physical Sciences Technology Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering High temperature polymer electrolyte membrane fuel cells Phosphate promotion effect Atomically dispersed bimetallic FeCu catalysts Oxygen reduction reaction Pt-free cathodes OXYGEN REDUCTION REACTION POLYMER ELECTROLYTE MEMBRANES TOTAL-ENERGY CALCULATIONS EXCHANGE MEMBRANE ANION ADSORPTION WIDE-RANGE COPPER IRON NITROGEN PLATINUM Phosphate poisoning of Pt electrocatalysts is one of the major barriers that constrains the performance of phosphoric acid-doped polybenzimidazole (PA/PBI) membrane fuel cells. Herein, we developed new atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts. The cell with FeCu/N-CNTs cathodes delivers a peak power density of 302 mWcm−2 at 230℃, similar to that using Pt/C electrocatalysts (1 mgPt cm−2) but with a much better stability. In contrast to phosphate poisoning of Pt/C, FeCu/N-CNTs show PA enhanced activities. DFT calcualtions indicate that phosphate promotion effect results from the stronger binding of phosphate on Cu sites, which decreases the activation energy barrier for the cleavage of the O2 double bond and provides local protons to facilitate the proton-coupled electron transfer ORR. The results also show that FeCu/N-CNTs have a much better activity for ORR as comapre to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. This study demonstrates the promising potential of bimetallic FeCu/N-CNTs as true Pt-free, highly active and durable cathodes for PA/PBI based high temperature polymer electrolyte fuel cells. 2021 Journal Article http://hdl.handle.net/20.500.11937/90808 10.1016/j.apcatb.2020.119717 English http://purl.org/au-research/grants/arc/DP180100568 http://purl.org/au-research/grants/arc/DP180100731 http://creativecommons.org/licenses/by-nc-nd/4.0/ ELSEVIER fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering High temperature polymer electrolyte membrane fuel cells Phosphate promotion effect Atomically dispersed bimetallic FeCu catalysts Oxygen reduction reaction Pt-free cathodes OXYGEN REDUCTION REACTION POLYMER ELECTROLYTE MEMBRANES TOTAL-ENERGY CALCULATIONS EXCHANGE MEMBRANE ANION ADSORPTION WIDE-RANGE COPPER IRON NITROGEN PLATINUM Cheng, Yi Wang, M. Lu, S. Tang, C. Wu, X. Veder, Jean-Pierre Johannessen, B. Thomsen, L. Zhang, J. Yang, S.Z. Wang, S. Jiang, San Ping First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title | First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title_full | First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title_fullStr | First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title_full_unstemmed | First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title_short | First demonstration of phosphate enhanced atomically dispersed bimetallic FeCu catalysts as Pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| title_sort | first demonstration of phosphate enhanced atomically dispersed bimetallic fecu catalysts as pt-free cathodes for high temperature phosphoric acid doped polybenzimidazole fuel cells |
| topic | Science & Technology Physical Sciences Technology Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering High temperature polymer electrolyte membrane fuel cells Phosphate promotion effect Atomically dispersed bimetallic FeCu catalysts Oxygen reduction reaction Pt-free cathodes OXYGEN REDUCTION REACTION POLYMER ELECTROLYTE MEMBRANES TOTAL-ENERGY CALCULATIONS EXCHANGE MEMBRANE ANION ADSORPTION WIDE-RANGE COPPER IRON NITROGEN PLATINUM |
| url | http://purl.org/au-research/grants/arc/DP180100568 http://purl.org/au-research/grants/arc/DP180100568 http://hdl.handle.net/20.500.11937/90808 |