Acoustic wave effects on catalysis: design of surfaces with artificially controllable functions for chemical reactions |
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| Affiliation: | 1. Department of Physics and Research Centre, Women''s Christian College, Nagercoil 629 001, Tamil Nadu, India;2. Post Graduate and Research Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641020, Tamil Nadu, India;3. Department of Physics and Research Centre, Mar Ivanios College, Nalancira 695015, Kerala, India;4. Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad 201 002, India;1. Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India;2. New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India;3. International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India;1. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore;2. CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, F-31077 Toulouse cedex 4, France;3. Université de Toulouse, UPS, INPT, F-31077 Toulouse cedex 4, France;4. Synchrotron Radiation Research Center, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan;5. Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan;6. Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8520, Japan;7. Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;1. MOE (Ministry of Education) Key Laboratory of Protein Sciences, Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China;2. Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing 100084, China;3. MD Anderson Cancer Center, University of Texas, Houston, TX 77030, USA;1. Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Chemical Engineering Department, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro, 1, 1959-007 Lisboa, Portugal;3. Department of Industrial Engineering, University of Padua, Via Marzolo 9, 35131 Padova, Italy;4. Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
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| Abstract: | The effects of surface acoustic wave (SAW) and resonance oscillation (RO) of bulk acoustic waves on the catalysis of metals were studied in an attempt to design a catalyst surface with artificially controllable functions for chemical reactions. In ethanol decomposition on a thin Cu film catalyst deposited on the propagation path of a shear horizontal leaky SAW, the SAW-on increased the activity for ethylene production remarkably but a little for acetaldehyde production. A poled ferroelectric z-cut LiNbO3 with a thickness extensional mode RO (TERO) and a x-cut LiNbO3 with a thickness shear mode RO (TSRO) were employed as a substrate, on which a thin Ag film catalyst was deposited. For ethanol decomposition, TERO increased ethylene production activity and the selectivity for ethylene production from 79 to 96%, whereas TSRO caused little activity enhancement for both ethylene and acetaldehyde production. The combination with the results of laser Doppler measurements showed that the activity enhancement and selectivity changes with SAW and RO of the acoustic waves are associated with dynamic large lattice displacement vertical to the surface. |
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