Facet effects of palladium nanocrystals for oxygen reduction in ionic liquids and for sensing applications

Details

• Personal Author:
  Chi X ; Shouzhong Z ; Tang Y ; Zeng X
• Description:
  Palladium nanocrystals enclosed by {100} and {110} crystal facets, were successfully synthesized through an aqueous one-pot synthesis method. A new thermal annealing approach was developed for fabricating these palladium nanocrystals as a working electrode on a gas permeable membrane to study the facet effects of the oxygen reduction process in an ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Bmpy][NTf2]). Results were compared with the same processes at a conventional platinum electrode. Our study shows that the structural difference between the two facets of Pd nanocrystals has little effect on the oxygen reduction process but significantly affects the oxidation process of the superoxide. It is found that the Pd{110}/IL interface can better stabilize superoxide radicals revealed by a more positive oxidation potential compared to that of Pd{100}. In addition, the analytical characteristic of utilizing both palladium nanocrystals as electrodes for oxygen sensing is comparable with a polycrystal platinum oxygen sensor, in which Pd{110} presents the best sensitivity and lowest detection limit. Our results demonstrate the facet-dependence of oxygen reduction in an ionic liquid medium and provide the fundamental information needed to guide the applications of palladium nanocrystals in electrochemical gas sensor and fuel cell research. [Description provided by NIOSH]
• Subjects:
  Occupational Health Oxidants Oxygen Safety Temperature
• Keywords:
  Aqueous Solutions Cell Function Gases Membrane Filters Nanotechnology Oxidative Processes Palladium Platinum Sensors Thermal Effects
• ISSN:
  2040-3364
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  District of Columbia ; Michigan ; OSHA Region 3 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  8
• Issue:
  10
• NIOSHTIC Number:
  nn:20048653
• Citation:
  Nanoscale 2016 Mar; 8(10):5771-5779
• Contact Point Address:
  X Zeng, Department of Chemistry, Oakland University, Rochester, Michigan 48309
• Email:
  zeng@oakland.edu
• CAS Registry Number:
  Oxygen (CAS RN 7782-44-7) ; Platinum (CAS RN 7440-06-4)
• Federal Fiscal Year:
  2016
• Performing Organization:
  Michigan State University
• Peer Reviewed:
  True
• Start Date:
  20100901
• Source Full Name:
  Nanoscale
• End Date:
  20150831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7036846550eb8b5138d3e6e473282736b7f51034b49e2f50056246181ff4be63ef6f6196babc7ce3ec8a76dd75ecf2075a07cb02c18e1a2f467ecd2beda85f8e
• Download URL:
  https://stacks.cdc.gov/view/cdc/203361/cdc_203361_DS1.pdf
• File Type:
  [PDF - 1.74 MB ]