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Deng Y, Liu H, Lai L, She F, Liu F, Li M, Yu Z, Li J, Zhu D, Li H, Wei L, Chen Y. Platinum-Ruthenium Bimetallic Nanoparticle Catalysts Synthesized Via Direct Joule Heating for Methanol Fuel Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403967. [PMID: 39106223 DOI: 10.1002/smll.202403967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 07/21/2024] [Indexed: 08/09/2024]
Abstract
Platinum-Ruthenium (PtRu) bimetallic nanoparticles are promising catalysts for methanol oxidation reaction (MOR) required by direct methanol fuel cells. However, existing catalyst synthesis methods have difficulty controlling their composition and structures. Here, a direct Joule heating method to yield highly active and stable PtRu catalysts for MOR is shown. The optimized Joule heating condition at 1000 °C over 50 microseconds produces uniform PtRu nanoparticles (6.32 wt.% Pt and 2.97 wt% Ru) with an average size of 2.0 ± 0.5 nanometers supported on carbon black substrates. They have a large electrochemically active surface area (ECSA) of 239 m2 g-1 and a high ECSA normalized specific activity of 0.295 mA cm-2. They demonstrate a peak mass activity of 705.9 mA mgPt -1 for MOR, 2.8 times that of commercial 20 wt.% platinum/carbon catalysts, and much superior to PtRu catalysts obtained by standard hydrothermal synthesis. Theoretical calculation results indicate that the superior catalytic activity can be attributed to modified Pt sites in PtRu nanoparticles, enabling strong methanol adsorption and weak carbon monoxide binding. Further, the PtRu catalyst demonstrates excellent stability in two-electrode methanol fuel cell tests with 85.3% current density retention and minimum Pt surface oxidation after 24 h.
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Affiliation(s)
- Yeyu Deng
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Heng Liu
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, 980-8577, Japan
| | - Leo Lai
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Fangxin She
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Fangzhou Liu
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Mohan Li
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Zixun Yu
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Jing Li
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Di Zhu
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Hao Li
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, 980-8577, Japan
| | - Li Wei
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
| | - Yuan Chen
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, New South Wales, 2006, Australia
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Hu Y, Liu X, Zou Y, Xie H, Zhu T. Nature of support plays vital roles in H2O promoted CO oxidation over Pt catalysts. J Catal 2022. [DOI: 10.1016/j.jcat.2022.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zuo Y, Wang Z, Zhao H, Zhao L, Zhang L, Yi B, Bao W, Zhang Y, Su L, Yu Y, Xie J. Synthesis of a Spatially Confined, Highly Durable, and Fully Exposed Pd Cluster Catalyst via Sequential Site-Selective Atomic Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14466-14473. [PMID: 35312273 DOI: 10.1021/acsami.2c00009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Bottom-up synthesis based on site-selective atomic layer deposition is a powerful atomic-scale processing approach to fabricate materials with desired functionalities. Typical selective atomic layer deposition (ALD) can be achieved using selective activation of a growth area or selective deactivation of a protected area. In this work, we explored the site selectivity based on the difference of the inherent surface reactivity between different materials and within the same materials. By sequentially applying two site-selective atomic layer deposition, the ALD Pd catalyst is spatially confined on ALD SnO2 modified h-BN substrate Pd/SnO2/h-BN shows improved catalytic activity and stability due to strong metal-support interactions and spatial confinement. The results reveal that sequential site-selective ALD is a feasible and effective synthesis strategy that provides an attractive path toward designing and developing highly stable catalysts.
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Affiliation(s)
- Yuqing Zuo
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Zeyu Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Haojie Zhao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Lianqi Zhao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Lunjia Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Beili Yi
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Wenda Bao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yue Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Longxing Su
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yi Yu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Jin Xie
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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