Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation
Abstract
In this work, a generic one-pot hydrothermal synthesis route has been successfully designed and utilized to in situ grow uniform manganese oxide nanorods and nanowires onto the cordierite honeycomb monolithic substrates, forming a series of nanoarray-based monolithic catalysts. During the synthesis process, three types of potassium salt oxidants have been used with different reduction potentials, i.e., K2Cr2O7, KClO3, and K2S2O8, denoted as HM-DCM, HM-PCR, and HM-PSF, respectively. The different reduction potentials of the manganese source (Mn2+) and oxidants induced the formation of manganese oxide nanoarrays with different morphology, surface area, and reactivity of carbon monoxide (CO) oxidation. K2Cr2O7 and KClO3 can induce sharp and long nanowires with slow growth rates due to their low reduction potentials. In comparison, the nanoarrays of HM-PSF presented shorter nanorods but displayed an efficient 90% CO oxidation conversion at 200 °C (T90) without noble-metal loading. Reducibility tests for the three monolithic catalysts by hydrogen temperature-programmed reduction revealed an activation energy order of HM-PSF > HM-DCM > HM-PCR for CO oxidation. The characterizations of oxygen temperature-programmed desorption and X-ray photoelectron spectroscopy indicated the abundant surface-adsorbed oxygen and lattice oxygen contributing to the superior reactivity of HM-PSF. Finally, the straightforward synthetic process showed a scalable, low-cost, andmore »
- Authors:
-
- Univ. of Connecticut, Storrs, CT (United States). Department of Chemistry
- Univ. of Connecticut, Storrs, CT (United States). Department of Chemistry. Department of Materials Science and Engineering & Institute of Materials Science
- Univ. of Connecticut, Storrs, CT (United States). Department of Chemistry and Department of Materials Science and Engineering & Institute of Materials Science
- Publication Date:
- Research Org.:
- Univ. of Connecticut, Storrs, CT (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- OSTI Identifier:
- 1430244
- Grant/Contract Number:
- EE0006854
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 12; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; array; CO oxidation; manganese oxide; monolithic catalysts; nanorod
Citation Formats
Chen, Sheng-Yu, Song, Wenqiao, Lin, Hui-Jan, Wang, Sibo, Biswas, Sourav, Mollahosseini, Mehdi, Kuo, Chung-Hao, Gao, Pu-Xian, and Suib, Steven L. Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation. United States: N. p., 2016.
Web. doi:10.1021/acsami.6b00578.
Chen, Sheng-Yu, Song, Wenqiao, Lin, Hui-Jan, Wang, Sibo, Biswas, Sourav, Mollahosseini, Mehdi, Kuo, Chung-Hao, Gao, Pu-Xian, & Suib, Steven L. Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation. United States. https://doi.org/10.1021/acsami.6b00578
Chen, Sheng-Yu, Song, Wenqiao, Lin, Hui-Jan, Wang, Sibo, Biswas, Sourav, Mollahosseini, Mehdi, Kuo, Chung-Hao, Gao, Pu-Xian, and Suib, Steven L. Tue .
"Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation". United States. https://doi.org/10.1021/acsami.6b00578. https://www.osti.gov/servlets/purl/1430244.
@article{osti_1430244,
title = {Manganese Oxide Nanoarray-Based Monolithic Catalysts: Tunable Morphology and High Efficiency for CO Oxidation},
author = {Chen, Sheng-Yu and Song, Wenqiao and Lin, Hui-Jan and Wang, Sibo and Biswas, Sourav and Mollahosseini, Mehdi and Kuo, Chung-Hao and Gao, Pu-Xian and Suib, Steven L.},
abstractNote = {In this work, a generic one-pot hydrothermal synthesis route has been successfully designed and utilized to in situ grow uniform manganese oxide nanorods and nanowires onto the cordierite honeycomb monolithic substrates, forming a series of nanoarray-based monolithic catalysts. During the synthesis process, three types of potassium salt oxidants have been used with different reduction potentials, i.e., K2Cr2O7, KClO3, and K2S2O8, denoted as HM-DCM, HM-PCR, and HM-PSF, respectively. The different reduction potentials of the manganese source (Mn2+) and oxidants induced the formation of manganese oxide nanoarrays with different morphology, surface area, and reactivity of carbon monoxide (CO) oxidation. K2Cr2O7 and KClO3 can induce sharp and long nanowires with slow growth rates due to their low reduction potentials. In comparison, the nanoarrays of HM-PSF presented shorter nanorods but displayed an efficient 90% CO oxidation conversion at 200 °C (T90) without noble-metal loading. Reducibility tests for the three monolithic catalysts by hydrogen temperature-programmed reduction revealed an activation energy order of HM-PSF > HM-DCM > HM-PCR for CO oxidation. The characterizations of oxygen temperature-programmed desorption and X-ray photoelectron spectroscopy indicated the abundant surface-adsorbed oxygen and lattice oxygen contributing to the superior reactivity of HM-PSF. Finally, the straightforward synthetic process showed a scalable, low-cost, and template-free method to fabricate manganese oxide nanoarray monolithic catalysts for exhaust treatment.},
doi = {10.1021/acsami.6b00578},
journal = {ACS Applied Materials and Interfaces},
number = 12,
volume = 8,
place = {United States},
year = {Tue Mar 08 00:00:00 EST 2016},
month = {Tue Mar 08 00:00:00 EST 2016}
}
Web of Science
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