Journal article
Oxygen Reduction Electrocatalyst Based on Strongly Coupled Cobalt Oxide Nanocrystals and Carbon Nanotubes
Journal of the American Chemical Society, v 134(38), pp 15849-15857
26 Sep 2012
PMID: 22957510
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrocatalyst for oxygen reduction reaction (ORR) is crucial for a variety of renewable energy applications and energy-intensive industries. The design and synthesis of highly active ORR catalysts with strong durability at low cost is extremely desirable but remains challenging. Here, we used a simple two-step method to synthesize cobalt oxide/carbon nanotube (CNT) strongly coupled hybrid as efficient ORR catalyst by directly growing nanocrystals on oxidized multiwalled CNTs. The mildly oxidized CNTs provided functional groups on the outer walls to nucleate and anchor nanocrystals, while retaining intact inner walls for highly conducting network. Cobalt oxide was in the form of CoO due to a gas-phase annealing step in NH3. The resulting CoO/nitrogen-doped CNT (NCNT) hybrid showed high ORR current density that outperformed Co3O4/graphene hybrid and commercial Pt/C catalyst at medium overpotential, mainly through a 4e reduction pathway. The metal oxide/carbon nanotube hybrid was found to be advantageous over the graphene counterpart in terms of active sites and charge transport. Last, the CoO/NCNT hybrid showed high ORR activity and stability under a highly corrosive condition of 10 M NaOH at 80 degrees C, demonstrating the potential of strongly coupled inorganic/nanocarbon hybrid as a novel catalyst system in oxygen depolarized cathode for chlor-alkali electrolysis.
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Details
- Title
- Oxygen Reduction Electrocatalyst Based on Strongly Coupled Cobalt Oxide Nanocrystals and Carbon Nanotubes
- Creators
- Yongye Liang - Stanford UniversityHailiang Wang - Stanford UniversityPeng Diao - Stanford UniversityWesley Chang - Stanford UniversityGuosong Hong - Stanford UniversityYanguang Li - Stanford UniversityMing Gong - Stanford UniversityLiming Xie - Stanford UniversityJigang Zhou - Canadian Light SourceJian Wang - Canadian Light SourceTom Z. Regier - Canadian Light SourceFei Wei - Tsinghua UniversityHongjie Dai - Stanford University
- Publication Details
- Journal of the American Chemical Society, v 134(38), pp 15849-15857
- Publisher
- Amer Chemical Soc
- Number of pages
- 9
- Grant note
- NRC; National Research Centre (NRC) WEDC Province of Saskatchewan NSERC; Natural Sciences and Engineering Research Council of Canada (NSERC) CIHR of Canada; Canadian Institutes of Health Research (CIHR) Stinehart Grant for Energy Research at Stanford from the Stanford Precourt Institute for Energy University of Saskatchewan
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000309099700042
- Scopus ID
- 2-s2.0-84866696454
- Other Identifier
- 991021889835904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary