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Pd nanoparticles deposited on Co(OH)(2)nanoplatelets as a bifunctional electrocatalyst and their application in Zn-air and Li-O(2)batteries

Title
Pd nanoparticles deposited on Co(OH)(2)nanoplatelets as a bifunctional electrocatalyst and their application in Zn-air and Li-O(2)batteries
Authors
Hyun, SuyeonSaejio, ApichatShanmugam, Sangaraju
DGIST Authors
Shanmugam, Sangaraju
Issue Date
2020-09
Citation
Nanoscale, 12(34), 17858-17869
Type
Article
Article Type
Article
Keywords
METAL-ORGANIC FRAMEWORKOXYGEN REDUCTIONCARBONCATALYSTNANOCRYSTALSNANOHYBRIDSHYDROXIDENETWORKSSPHERESARRAYS
ISSN
2040-3364
Abstract
The development of affordable electrocatalysts for both oxygen reduction and evolution reactions (ORR/OER) has received great interest due to their importance in metal-air batteries and regenerative fuel cells. We developed a high-performance bifunctional oxygen electrocatalyst based on Pd nanoparticles supported on cobalt hydroxide nanoplatelets (Pd/Co(OH)2) as an air cathode for metal-air batteries. The Pd/Co(OH)2 shows remarkably higher electrocatalytic activity in comparison with commercial catalysts (Pt/C, IrO2), including an ORR half-wave potential (E1/2) of 0.87 V vs. RHE and an OER overpotential of 0.39 V at 10 mA cm-2 in aqueous alkaline medium. The Zn-air battery constructed with Pd/Co(OH)2 presents stable charge/discharge voltage (ΔEOER-ORR = 0.69 V), along with durable cycling stability for over 30 h. Also, this cathode exhibits a maximum discharge capacity of 17 698 mA h g-1, and stable battery operation over 50 cycles at a fixed capacity of 1000 mA h g-1, as an efficient air electrode for Li-O2 batteries, indicating that Pd/Co(OH)2 can be a potential candidate for both aqueous and non-aqueous metal-air batteries. © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/12691
DOI
10.1039/d0nr05403h
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
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Collection:
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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