Iron-doped ZnO as a support for Pt-based catalysts to improve activity and stability: enhancement of metal-support interaction by the doping effect.

Autor:	Trung Tran SB; Centre for Nanomaterials and Chemical Reactions, Institute of Basic Science (IBS) Daejeon 305-701 Republic of Korea jeongypark@kaist.ac.kr., Choi HS; Centre for Nanomaterials and Chemical Reactions, Institute of Basic Science (IBS) Daejeon 305-701 Republic of Korea jeongypark@kaist.ac.kr.; Graduate School of EEWS and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 305-701 Republic of Korea., Oh SY; Centre for Nanomaterials and Chemical Reactions, Institute of Basic Science (IBS) Daejeon 305-701 Republic of Korea jeongypark@kaist.ac.kr.; Graduate School of EEWS and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 305-701 Republic of Korea., Moon SY; Centre for Nanomaterials and Chemical Reactions, Institute of Basic Science (IBS) Daejeon 305-701 Republic of Korea jeongypark@kaist.ac.kr.; Graduate School of EEWS and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 305-701 Republic of Korea., Park JY; Centre for Nanomaterials and Chemical Reactions, Institute of Basic Science (IBS) Daejeon 305-701 Republic of Korea jeongypark@kaist.ac.kr.; Graduate School of EEWS and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 305-701 Republic of Korea.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2018 Jun 12; Vol. 8 (38), pp. 21528-21533. Date of Electronic Publication: 2018 Jun 12 (Print Publication: 2018).
DOI:	10.1039/c8ra03664k
Abstrakt:	In heterogeneous catalysis, the role of the interface between a metal and a metal oxide in deciding catalytic performance has remained a long-standing question. Out of many molecular-scale factors that affect the properties of metal-oxide interfaces, doping or impurities in the oxides can result in excess charge carriers or oxygen vacancies on the oxides, which lead to a change in catalytic activity. For a model system with a tunable dopant, we employed Pt nanoparticles with Fe doping. We synthesized a series of Fe-doped ZnO with different Fe loadings ( i.e. , 0, 1, and 4%) using the co-precipitation method, and then deposited Pt nanoparticles onto these supports. The Pt-based catalysts were employed to investigate the effect of the dopant to promote the catalytic performance for the CO oxidation reaction. The 4% Fe loading sample showed the highest catalytic activity among the catalysts, with a turnover frequency of 5.37 s -1 at 126 °C. The dopant was found to enhance the interaction between the Pt nanoparticles and the catalyst support, including the prevention of metal sintering, which resulted in an improvement of catalytic activity. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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