Palladium–platinum core-shell icosahedra with substantially enhanced activity and durability towards oxygen reduction
Georgia Institute of Technology · Xiamen University · +5 more institutions
Abstract
Conformal deposition of platinum as ultrathin shells on facet-controlled palladium nanocrystals offers a great opportunity to enhance the catalytic performance while reducing its loading. Here we report such a system based on palladium icosahedra. Owing to lateral confinement imposed by twin boundaries and thus vertical relaxation only, the platinum overlayers evolve into a corrugated structure under compressive strain. For the core-shell nanocrystals with an average of 2.7 platinum overlayers, their specific and platinum mass activities towards oxygen reduction are enhanced by eight- and sevenfold, respectively, relative to a commercial catalyst. Density functional theory calculations indicate that the…
Citation impact
- FWCI
- 22.44
- Percentile
- 100%
- References
- 49
Authors
12- XWXue Wang
Georgia Institute of Technology, Xiamen University, The Wallace H. Coulter Department of Biomedical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials
- SCSang‐Il Choi
Georgia Institute of Technology, The Wallace H. Coulter Department of Biomedical Engineering
- LTLuke T. Roling
University of Wisconsin–Madison
- MLMing Luo
Georgia Institute of Technology, The Wallace H. Coulter Department of Biomedical Engineering
- CMCheng Ma
Oak Ridge National Laboratory
Topics & keywords
- Platinum
- Palladium
- Nanocrystal
- Catalysis
- Materials science
- Durability
- Oxygen reduction
- Nanotechnology
Funding
- UDU.S. Department of EnergyAwards: -AC02-05CH11231, AC02-06CH11357, FG02-05ER15731, 05CH11231, contract DE-AC02-06CH11357, AC02-05CH11231, DE-AC02, DE-FG02-05ER15731, 06CH11357, DE-FG02-, DE-AC02-05CH11231, DE-AC02-06CH11357, DE-FG02, DE-AC02-
- GIGeorgia Institute of TechnologyAward: DE-AC02-06CH11357
- ASArizona State University
- NENational Energy Research Scientific Computing CenterAwards: 05CH11231, AC02-05CH11231
- CSChina Scholarship CouncilAwards: DE-AC02-06CH11357, DE-AC02-05CH11231
- OOOffice of ScienceAwards: DE-AC02-06CH11357, DE-FG02-05ER15731, AC02-05CH11231, -AC02-05CH11231, DE-AC02, 06CH11357, AC02-06CH11357
- BABiological and Environmental ResearchAwards: 05CH11231, DE-AC02-06CH11357, DE-AC02-05CH11231, AC02-05CH11231
- OROak Ridge National LaboratoryAwards: DE-AC02-05CH11231, DE-AC02-06CH11357
- PNPacific Northwest National LaboratoryAwards: DE-AC02-06CH11357, DE-AC02-05CH11231