In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis
Tuning intermediate adsorption energy by shifting the d-band center offers a powerful strategy to tailor the reactivity of metal catalysts. Here we report a potential sweep method to grow Pd layer-by-layer on Au with the capability to in situ measure the surface structure through an ethanol oxidatio...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160329 |
| _version_ | 1811697250476228608 |
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| author | Zhang, Junming Xu, Weichang Liu, Yuan Hung, Sung-Fu Liu, Wei Lam, Zhenhui Tao, Hua Bing Yang, Hongbin Cai, Weizheng Xiao, Hai Chen, Hongyu Liu, Bin |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Zhang, Junming Xu, Weichang Liu, Yuan Hung, Sung-Fu Liu, Wei Lam, Zhenhui Tao, Hua Bing Yang, Hongbin Cai, Weizheng Xiao, Hai Chen, Hongyu Liu, Bin |
| author_sort | Zhang, Junming |
| collection | NTU |
| description | Tuning intermediate adsorption energy by shifting the d-band center offers a powerful strategy to tailor the reactivity of metal catalysts. Here we report a potential sweep method to grow Pd layer-by-layer on Au with the capability to in situ measure the surface structure through an ethanol oxidation reaction. Spectroscopic characterizations reveal charge-transfer induced valence band restructuring in the Pd overlayer, which shifts the d-band center away from the Fermi level compared to bulk Pd. Precise overlayer control gives the optimal bimetallic surface of two monolayers (ML) Pd on Au, which exhibits more than 370-fold mass activity enhancement in oxygen reduction reaction (at 0.9 V vs. reversible hydrogen electrode) and 40 mV increase in half-wave potential compared to the Pt/C. Tested in a homemade Zn-air battery, the 2-ML-Pd/Au/C exhibits a maximum power density of 296 mW/cm2 and specific activity of 804 mAh/gZn, much higher than Pt/C with the same catalyst loading amount. |
| first_indexed | 2024-10-01T07:52:16Z |
| format | Journal Article |
| id | ntu-10356/160329 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:52:16Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1603292023-12-12T08:24:31Z In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis Zhang, Junming Xu, Weichang Liu, Yuan Hung, Sung-Fu Liu, Wei Lam, Zhenhui Tao, Hua Bing Yang, Hongbin Cai, Weizheng Xiao, Hai Chen, Hongyu Liu, Bin School of Chemical and Biomedical Engineering School of Physical and Mathematical Sciences Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Engineering::Chemical engineering Bimetallic Surface Electronic Effect Tuning intermediate adsorption energy by shifting the d-band center offers a powerful strategy to tailor the reactivity of metal catalysts. Here we report a potential sweep method to grow Pd layer-by-layer on Au with the capability to in situ measure the surface structure through an ethanol oxidation reaction. Spectroscopic characterizations reveal charge-transfer induced valence band restructuring in the Pd overlayer, which shifts the d-band center away from the Fermi level compared to bulk Pd. Precise overlayer control gives the optimal bimetallic surface of two monolayers (ML) Pd on Au, which exhibits more than 370-fold mass activity enhancement in oxygen reduction reaction (at 0.9 V vs. reversible hydrogen electrode) and 40 mV increase in half-wave potential compared to the Pt/C. Tested in a homemade Zn-air battery, the 2-ML-Pd/Au/C exhibits a maximum power density of 296 mW/cm2 and specific activity of 804 mAh/gZn, much higher than Pt/C with the same catalyst loading amount. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) This work was supported by the fund from the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1: RG4/20 and Tier 2: MOET2EP10120-0002, and Agency for Science, Technology, and Research (A*Star IRG: A20E5c0080). 2022-07-19T06:36:23Z 2022-07-19T06:36:23Z 2021 Journal Article Zhang, J., Xu, W., Liu, Y., Hung, S., Liu, W., Lam, Z., Tao, H. B., Yang, H., Cai, W., Xiao, H., Chen, H. & Liu, B. (2021). In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis. Nano Letters, 21(18), 7753-7760. https://dx.doi.org/10.1021/acs.nanolett.1c02705 1530-6984 https://hdl.handle.net/10356/160329 10.1021/acs.nanolett.1c02705 34516143 2-s2.0-85116120402 18 21 7753 7760 en RG4/20 MOET2EP10120-0002 A20E5c0080 Nano Letters © 2021 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Bimetallic Surface Electronic Effect Zhang, Junming Xu, Weichang Liu, Yuan Hung, Sung-Fu Liu, Wei Lam, Zhenhui Tao, Hua Bing Yang, Hongbin Cai, Weizheng Xiao, Hai Chen, Hongyu Liu, Bin In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title | In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title_full | In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title_fullStr | In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title_full_unstemmed | In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title_short | In situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| title_sort | in situ precise tuning of bimetallic electronic effect for boosting oxygen reduction catalysis |
| topic | Engineering::Chemical engineering Bimetallic Surface Electronic Effect |
| url | https://hdl.handle.net/10356/160329 |
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