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Liao GJ, Hsueh WH, Yen YH, Shih YC, Wang CH, Wang JH, Luo MF. Decomposition of methanol-d 4 on Rh nanoclusters supported by thin-film Al 2O 3/NiAl(100) under near-ambient-pressure conditions. Phys Chem Chem Phys 2024; 26:5059-5069. [PMID: 38258542 DOI: 10.1039/d3cp05303b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
The decomposition of methanol-d4 (CD3OD) on Rh nanoclusters grown by the deposition of Rh vapors onto an ordered thin film of Al2O3/NiAl(100) was studied, with various surface-probe techniques and largely under near-ambient-pressure (NAP) conditions. The results showed a superior reactivity of small Rh clusters (diameter < 1.5 nm) exposed to CD3OD at 5 × 10-3-0.1 mbar at 400 K; the gaseous production of CO and D2 from decomposed methanol-d4 per Rh surface site on the small Rh clusters with diameters of ∼1.1 nm was nearly 8 times that on large ones with diameters of ∼3.5 nm. The promotion of reactivity with decreased cluster size under NAP conditions was evidently greater than that under ultrahigh vacuum conditions. Moreover, the concentration of atomic carbon (C*; where * denotes adsorbate)-a key catalyst poisoner-yielded from the dissociation of CO* from dehydrogenated methanol-d4 was significantly smaller on small clusters (diameter < 1.5 nm). The NAP size effect on methanol-d4 decomposition involved the surface hydroxyl (OH*) from the little co-adsorbed water (H2O*) that was dissociated at a probability dependent on the cluster size. H2O* was more likely dissociated into OH* on small Rh clusters, by virtue of their more reactive d-band structure, and the OH* then effectively promoted the O-D cleavage of methanol-d4, as the rate-determining step, and thus the reaction probability; on the other hand, the OH* limited CO* dissociation on small Rh clusters via both adsorbate and lateral effects. These results suggest that the superior properties of small Rh clusters in both reactivity and anti-poisoning would persist and be highly applicable under "real-world" catalysis conditions.
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Affiliation(s)
- Guan-Jr Liao
- Department of Physics, National Central University, No. 300 Jhongda Road, Jhongli 32054, Taiwan.
| | - Wen-Hao Hsueh
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Ting-Zhou Road, Taipei, Taiwan.
| | - Yu-Hsiang Yen
- Department of Physics, National Central University, No. 300 Jhongda Road, Jhongli 32054, Taiwan.
| | - Yi-Chan Shih
- Department of Physics, National Central University, No. 300 Jhongda Road, Jhongli 32054, Taiwan.
| | - Chia-Hsin Wang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Jeng-Han Wang
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Ting-Zhou Road, Taipei, Taiwan.
| | - Meng-Fan Luo
- Department of Physics, National Central University, No. 300 Jhongda Road, Jhongli 32054, Taiwan.
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Palotás K, Óvári L, Vári G, Gubó R, Farkas AP, Kiss J, Berkó A, Kónya Z. Au–Rh Surface Structures on Rh(111): DFT Insights into the Formation of an Ordered Surface Alloy. THE JOURNAL OF PHYSICAL CHEMISTRY C 2018. [DOI: 10.1021/acs.jpcc.8b05744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Krisztián Palotás
- Department of Complex Physical Systems, Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9., SK-84511 Bratislava, Slovakia
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
- Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111 Budapest, Hungary
| | - László Óvári
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
- ELI-ALPS, ELI-HU Nonprofit Ltd., Dugonics tér 13., H-6720 Szeged, Hungary
| | - Gábor Vári
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
| | - Richárd Gubó
- ELI-ALPS, ELI-HU Nonprofit Ltd., Dugonics tér 13., H-6720 Szeged, Hungary
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
| | - Arnold P. Farkas
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
- ELI-ALPS, ELI-HU Nonprofit Ltd., Dugonics tér 13., H-6720 Szeged, Hungary
| | - János Kiss
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
| | - András Berkó
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
| | - Zoltán Kónya
- MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1., H-6720 Szeged, Hungary
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Lee H, Liao ZH, Hsu PW, Wu YC, Cheng MC, Wang JH, Luo MF. Decomposition of methanol-d4 on Au–Rh bimetallic nanoclusters on a thin film of Al2O3/NiAl(100). Phys Chem Chem Phys 2018; 20:11260-11272. [DOI: 10.1039/c8cp01714j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of Au nanoclusters was sharply enhanced by incorporating a few Rh atoms.
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Affiliation(s)
- Hsuan Lee
- Department of Physics
- National Central University
- Taoyuan 32001
- Taiwan
| | - Zhen-He Liao
- Department of Physics
- National Central University
- Taoyuan 32001
- Taiwan
| | - Po-Wei Hsu
- Department of Physics
- National Central University
- Taoyuan 32001
- Taiwan
| | - Yu-Cheng Wu
- Department of Physics
- National Central University
- Taoyuan 32001
- Taiwan
| | - Meng-Chin Cheng
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | - Jeng-Han Wang
- Department of Chemistry
- National Taiwan Normal University
- Taipei
- Taiwan
| | - Meng-Fan Luo
- Department of Physics
- National Central University
- Taoyuan 32001
- Taiwan
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Lee H, Liao ZH, Hsu PW, Hung TC, Wu YC, Lin Y, Wang JH, Luo MF. Surface structures and compositions of Au–Rh bimetallic nanoclusters supported on thin-film Al2O3/NiAl(100) probed with CO. J Chem Phys 2017; 147:044704. [DOI: 10.1063/1.4995598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Hsuan Lee
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
| | - Zhen-He Liao
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
| | - Po-Wei Hsu
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
| | - Ting-Chieh Hung
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
| | - Yu-Cheng Wu
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
| | - Yuwei Lin
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Jeng-Han Wang
- Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Meng-Fan Luo
- Department of Physics, National Central University, 300 Jhongda Road, Taoyuan 32001, Taiwan
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