Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction
The development of methanol-tolerate oxygen reduction reaction(ORR) electrocatalysts is of special significance to direct methanol fuel cells system. Iridium is known for its better methanol tolerance than platinum and able to survive in harsh acidic environment. However, its activity is relatively...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/161723 |
| _version_ | 1826123098653458432 |
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| author | Wang, Jiarui Zhou, Ye Sun, Libo Ge, Jingjie Wang, Jingxian Dai, Chencheng Xu, Zhichuan Jason |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Wang, Jiarui Zhou, Ye Sun, Libo Ge, Jingjie Wang, Jingxian Dai, Chencheng Xu, Zhichuan Jason |
| author_sort | Wang, Jiarui |
| collection | NTU |
| description | The development of methanol-tolerate oxygen reduction reaction(ORR) electrocatalysts is of special significance to direct methanol fuel cells system. Iridium is known for its better methanol tolerance than platinum and able to survive in harsh acidic environment. However, its activity is relatively low and thus the approach to improve Ir’s ORR is desired. Herein, bimetallic Ir-Cu nanoparticles(NPs) with controllable Ir/Cu compositions(ca. 1:2 to 4:1, atomic ratio) are synthesized via a galvanic replacement-based chemical method. The as-synthesized Ir-Cu NPs are investigated as ORR catalysts after electrochemically leaching out the surface Cu and forming Ir-skinned structures. Around 2- to 3-fold enhancement in the intrinsic activity has been observed in these Ir-skinned Ir-Cu catalysts compared to Ir counterpart. The approach is demonstrated to be a promising way to prepare efficient Ir ORR catalysts and lower catalyst cost. |
| first_indexed | 2024-10-01T05:59:05Z |
| format | Journal Article |
| id | ntu-10356/161723 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:59:05Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1617232022-09-16T06:47:47Z Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction Wang, Jiarui Zhou, Ye Sun, Libo Ge, Jingjie Wang, Jingxian Dai, Chencheng Xu, Zhichuan Jason School of Materials Science and Engineering Interdisciplinary Graduate School (IGS) Solar Fuels Laboratory Energy Research Institute @ NTU (ERI@N) Science::Chemistry Iridium Copper The development of methanol-tolerate oxygen reduction reaction(ORR) electrocatalysts is of special significance to direct methanol fuel cells system. Iridium is known for its better methanol tolerance than platinum and able to survive in harsh acidic environment. However, its activity is relatively low and thus the approach to improve Ir’s ORR is desired. Herein, bimetallic Ir-Cu nanoparticles(NPs) with controllable Ir/Cu compositions(ca. 1:2 to 4:1, atomic ratio) are synthesized via a galvanic replacement-based chemical method. The as-synthesized Ir-Cu NPs are investigated as ORR catalysts after electrochemically leaching out the surface Cu and forming Ir-skinned structures. Around 2- to 3-fold enhancement in the intrinsic activity has been observed in these Ir-skinned Ir-Cu catalysts compared to Ir counterpart. The approach is demonstrated to be a promising way to prepare efficient Ir ORR catalysts and lower catalyst cost. Ministry of Education (MOE) National Research Foundation (NRF) This research was supported by the Project of the Singapore Ministry of Education Tier 2(No.MOE2017-T2-1-009) and the Singapore National Research Foundation Under Its Campus for Research Excellence and Technological Enterprise(CREATE) Programme. 2022-09-16T06:47:46Z 2022-09-16T06:47:46Z 2020 Journal Article Wang, J., Zhou, Y., Sun, L., Ge, J., Wang, J., Dai, C. & Xu, Z. J. (2020). Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction. Chemical Research in Chinese Universities, 36(3), 467-472. https://dx.doi.org/10.1007/s40242-020-0087-1 1005-9040 https://hdl.handle.net/10356/161723 10.1007/s40242-020-0087-1 2-s2.0-85084845684 3 36 467 472 en MOE2017-T2-1-009 Chemical Research in Chinese Universities © 2020 Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH. All rights reserved. |
| spellingShingle | Science::Chemistry Iridium Copper Wang, Jiarui Zhou, Ye Sun, Libo Ge, Jingjie Wang, Jingxian Dai, Chencheng Xu, Zhichuan Jason Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title | Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title_full | Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title_fullStr | Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title_full_unstemmed | Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title_short | Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction |
| title_sort | ir skinned ir cu nanoparticles with enhanced activity for oxygen reduction reaction |
| topic | Science::Chemistry Iridium Copper |
| url | https://hdl.handle.net/10356/161723 |
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