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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Eliminating dissolution of platinum-based electrocatalysts at the atomic scale
Nature materials, v 19(11), pp 1207-1214
01 Nov 2020
PMID: 32690912
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Deployment of proton-exchange membrane fuel cells is limited by the durability of Pt-nanoscale catalysts during cathodic oxygen reduction reactions. Dissolution processes on single crystalline and thin film surfaces are now correlated leading to the design of PtAu catalysts with suppressed dissolution.
A remaining challenge for the deployment of proton-exchange membrane fuel cells is the limited durability of platinum (Pt) nanoscale materials that operate at high voltages during the cathodic oxygen reduction reaction. In this work, atomic-scale insight into well-defined single-crystalline, thin-film and nanoscale surfaces exposed Pt dissolution trends that governed the design and synthesis of durable materials. A newly defined metric, intrinsic dissolution, is essential to understanding the correlation between the measured Pt loss, surface structure, size and ratio of Pt nanoparticles in a carbon (C) support. It was found that the utilization of a gold (Au) underlayer promotes ordering of Pt surface atoms towards a (111) structure, whereas Au on the surface selectively protects low-coordinated Pt sites. This mitigation strategy was applied towards 3 nm Pt3Au/C nanoparticles and resulted in the elimination of Pt dissolution in the liquid electrolyte, which included a 30-fold durability improvement versus 3 nm Pt/C over an extended potential range up to 1.2 V.
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Details
- Title
- Eliminating dissolution of platinum-based electrocatalysts at the atomic scale
- Creators
- Pietro P. Lopes - Argonne National LaboratoryDongguo Li - Argonne National LaboratoryHaifeng Lv - Argonne National LaboratoryChao Wang - Johns Hopkins Univ, Dept Chem Engn, Baltimore, MD USADusan Tripkovic - University of BelgradeYisi Zhu - Argonne National LaboratoryRoberto Schimmenti - University of Wisconsin–MadisonHideo Daimon - Doshisha UniversityYijin Kang - Argonne National LaboratoryJoshua Snyder - Drexel UniversityNigel Becknell - Argonne National LaboratoryKarren L. More - Oak Ridge National LaboratoryDusan Strmcnik - Argonne National LaboratoryNenad M. Markovic - Argonne National LaboratoryManos Mavrikakis - University of Wisconsin–MadisonVojislav R. Stamenkovic - Argonne National LaboratoryOak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Details
- Nature materials, v 19(11), pp 1207-1214
- Publisher
- Springer Nature
- Number of pages
- 10
- Grant note
- DE-FG02-05ER15731 / Department of Energy, Basic Energy Sciences, Division of Chemical Sciences; United States Department of Energy (DOE) DE-AC02-06CH11357 / US DOE Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) DE-AC02-06CH11357 / US Department of Energy (DOE) Office of Science; United States Department of Energy (DOE) DE-AC02-05CH11231 / US DOE, Office of Science; United States Department of Energy (DOE) Hydrogen & Fuel Cell Technologies Office, Energy Efficiency and Renewable Energy, US Department of Energy; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000550625800004
- Scopus ID
- 2-s2.0-85088264549
- Other Identifier
- 991019168157804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter