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Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications. Catalysts 2018. [DOI: 10.3390/catal8110544] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A research and technological challenge for fuel processors integrated with High Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFCs), also known as Internal Reforming Methanol Fuel Cells (IRMFCs), operating at 200–220 °C, is the development of highly efficient catalysts, which will be able to selectively (low CO and other by-products formation) produce the required quantity of hydrogen at these temperatures. In this work, various amounts of platinum were dispersed via deposition-precipitation (DP) and impregnation (I) methods onto the surface of hydrothermally prepared ceria nanorods (CNRs) and titania nanotubes (TNTs). These nanostructured catalysts were evaluated in steam reforming of methanol process targeting the operation level of IRMFCs. The (DP) method resulted in highly (atomically) dispersed platinum-based catalysts, as confirmed with Scanning Transmission Electron Microscopy (STEM) analysis, with a mean particle size of less than 1 nm in the case of 0.35 wt.% Pt/CNRs catalyst. Ultra-fine dispersion of platinum species correlated with the presence of oxygen vacancies, together with the enrichment of CNRs surface with active metallic phase resulted in a highly active catalyst achieving at 220 °C a hydrogen production rate of 5500 cm3 min−1 per g of loaded platinum.
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Vijayan BK, Schwartzenberg KC, Wu J, Gray KA. Phase stability and photoactivity of CuO modified titania nanotube prepared by hydrothermal method. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yang S, Wu Z, Huang L, Zhou B, Lei M, Sun L, Tian Q, Pan J, Wu W, Zhang H. Significantly enhanced dye removal performance of hollow tin oxide nanoparticles via carbon coating in dark environment and study of its mechanism. NANOSCALE RESEARCH LETTERS 2014; 9:442. [PMID: 25221462 PMCID: PMC4150862 DOI: 10.1186/1556-276x-9-442] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 08/20/2014] [Indexed: 06/03/2023]
Abstract
Understanding the correlation between physicochemical properties and morphology of nanostructures is a prerequisite for widespread applications of nanomaterials in environmental application areas. Herein, we illustrated that the uniform-sized SnO2@C hollow nanoparticles were large-scale synthesized by a facile hydrothermal method. The size of the core-shell hollow nanoparticles was about 56 nm, and the shell was composed of a solid carbon layer with a thickness of 2 ~ 3 nm. The resulting products were characterized in terms of morphology, composition, and surface property by various analytical techniques. Moreover, the SnO2@C hollow nanoparticles are shown to be effective adsorbents for removing four different dyes from aqueous solutions, which is superior to the pure hollow SnO2 nanoparticles and commercial SnO2. The enhanced mechanism has also been discussed, which can be attributed to the high specific surface areas after carbon coating.
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Affiliation(s)
- Shuanglei Yang
- State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China
- Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhaohui Wu
- Department of Chemical Engineering, Kyung Hee University, Seocheon-Dong, Giheung-Gu, 446-701 Yongin, Korea
| | - LanPing Huang
- State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China
| | - Banghong Zhou
- State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China
| | - Mei Lei
- Key Laboratory of Artificial Micro and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Lingling Sun
- Key Laboratory of Artificial Micro and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Qingyong Tian
- Key Laboratory of Artificial Micro and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Jun Pan
- State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China
| | - Wei Wu
- Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, People's Republic of China
| | - Hongbo Zhang
- State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, People's Republic of China
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Vijayan BK, Dimitrijevic NM, Finkelstein-Shapiro D, Wu J, Gray KA. Coupling Titania Nanotubes and Carbon Nanotubes To Create Photocatalytic Nanocomposites. ACS Catal 2012. [DOI: 10.1021/cs200541a] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Baiju K. Vijayan
- Institute of Catalysis for Energy Processes, Center for Catalysis and Surface Science, ‡Department of Civil & Environmental Engineering, ∥Department of Chemistry, ¶Department of Materials Science and Engineering, and □The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division⊥Center for Nanoscale Materials, Argonne National Laboratory, Illinois
60439, United States
| | - Nada M. Dimitrijevic
- Institute of Catalysis for Energy Processes, Center for Catalysis and Surface Science, ‡Department of Civil & Environmental Engineering, ∥Department of Chemistry, ¶Department of Materials Science and Engineering, and □The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division⊥Center for Nanoscale Materials, Argonne National Laboratory, Illinois
60439, United States
| | - Daniel Finkelstein-Shapiro
- Institute of Catalysis for Energy Processes, Center for Catalysis and Surface Science, ‡Department of Civil & Environmental Engineering, ∥Department of Chemistry, ¶Department of Materials Science and Engineering, and □The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division⊥Center for Nanoscale Materials, Argonne National Laboratory, Illinois
60439, United States
| | - Jinsong Wu
- Institute of Catalysis for Energy Processes, Center for Catalysis and Surface Science, ‡Department of Civil & Environmental Engineering, ∥Department of Chemistry, ¶Department of Materials Science and Engineering, and □The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division⊥Center for Nanoscale Materials, Argonne National Laboratory, Illinois
60439, United States
| | - Kimberly A. Gray
- Institute of Catalysis for Energy Processes, Center for Catalysis and Surface Science, ‡Department of Civil & Environmental Engineering, ∥Department of Chemistry, ¶Department of Materials Science and Engineering, and □The NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
- Chemical
Sciences and Engineering Division⊥Center for Nanoscale Materials, Argonne National Laboratory, Illinois
60439, United States
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Schwartzenberg KC, Gray KA. Nanostructured Titania: the current and future promise of Titania nanotubes. Catal Sci Technol 2012. [DOI: 10.1039/c2cy00538g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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