Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol
Successfully prepared via Ar glow-discharge plasma reduction, Au–Pd bimetallic nanoparticles were highly active in the selective oxidation of benzyl alcohol, showing a rate constant of 0.50 h−1, which was 12.5 and 2× that of Au and Pd monometallic catalysts, respectively. Characterization analyses a...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/105285 http://hdl.handle.net/10220/17517 |
| _version_ | 1824454463474106368 |
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| author | Yang, Yanhui Jia, Xinli Zhang, Hua Zhou, Chunmei Chen, Yuanting Wang, Houpeng Liu, Chang-jun Zeng, Zhiyuan |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Yang, Yanhui Jia, Xinli Zhang, Hua Zhou, Chunmei Chen, Yuanting Wang, Houpeng Liu, Chang-jun Zeng, Zhiyuan |
| author_sort | Yang, Yanhui |
| collection | NTU |
| description | Successfully prepared via Ar glow-discharge plasma reduction, Au–Pd bimetallic nanoparticles were highly active in the selective oxidation of benzyl alcohol, showing a rate constant of 0.50 h−1, which was 12.5 and 2× that of Au and Pd monometallic catalysts, respectively. Characterization analyses attributed the enhancement in both activity and selectivity to a Pd-rich shell/Au-rich core structure with abundant surface-coordination-unsaturated Pd atoms of those effectively confined and well-dispersed Au–Pd nanoparticles. As a green, efficient, and safe protocol, plasma reduction outperformed conventional H2 thermal reduction due to the different particle nucleation and growth mechanism, which afforded modified morphology and surface chemistry of metal nanoparticles. Further oxidation and re-reduction of plasma-reduced Au–Pd catalyst resulted in the atomic rearrangement of nanoparticles, leading to inferior catalytic performance. |
| first_indexed | 2025-02-19T03:22:43Z |
| format | Journal Article |
| id | ntu-10356/105285 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:22:43Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1052852020-06-01T10:13:36Z Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol Yang, Yanhui Jia, Xinli Zhang, Hua Zhou, Chunmei Chen, Yuanting Wang, Houpeng Liu, Chang-jun Zeng, Zhiyuan School of Chemical and Biomedical Engineering School of Materials Science & Engineering Successfully prepared via Ar glow-discharge plasma reduction, Au–Pd bimetallic nanoparticles were highly active in the selective oxidation of benzyl alcohol, showing a rate constant of 0.50 h−1, which was 12.5 and 2× that of Au and Pd monometallic catalysts, respectively. Characterization analyses attributed the enhancement in both activity and selectivity to a Pd-rich shell/Au-rich core structure with abundant surface-coordination-unsaturated Pd atoms of those effectively confined and well-dispersed Au–Pd nanoparticles. As a green, efficient, and safe protocol, plasma reduction outperformed conventional H2 thermal reduction due to the different particle nucleation and growth mechanism, which afforded modified morphology and surface chemistry of metal nanoparticles. Further oxidation and re-reduction of plasma-reduced Au–Pd catalyst resulted in the atomic rearrangement of nanoparticles, leading to inferior catalytic performance. 2013-11-08T07:22:51Z 2019-12-06T21:48:46Z 2013-11-08T07:22:51Z 2019-12-06T21:48:46Z 2012 2012 Journal Article Chen, Y., Wang, H., Liu, C.-J., Zeng, Z., Zhang, H., Zhou, C., et al. (2012). Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol. Journal of Catalysis, 289, 105-117. 0021-9517 https://hdl.handle.net/10356/105285 http://hdl.handle.net/10220/17517 10.1016/j.jcat.2012.01.020 en Journal of catalysis |
| spellingShingle | Yang, Yanhui Jia, Xinli Zhang, Hua Zhou, Chunmei Chen, Yuanting Wang, Houpeng Liu, Chang-jun Zeng, Zhiyuan Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title | Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title_full | Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title_fullStr | Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title_full_unstemmed | Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title_short | Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| title_sort | formation of monometallic au and pd and bimetallic au pd nanoparticles confined in mesopores via ar glow discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol |
| url | https://hdl.handle.net/10356/105285 http://hdl.handle.net/10220/17517 |
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