Hybrid Structure of TiO2-Graphitic Carbon as a Support of Pt Nanoparticles for Catalyzing Oxygen Reduction Reactionopen access
- Authors
- Jang, Su-Jin; Kang, Yun Chan; Hyun, Jin-Su; Shin, Tae Ho; Lee, Young Wook; Roh, Kwang Chul
- Issue Date
- Oct-2021
- Publisher
- MDPI
- Keywords
- TiO2-carbon hybrid; catalyst support; durability; fuel cell; graphitic carbon
- Citation
- CATALYSTS, v.11, no.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- CATALYSTS
- Volume
- 11
- Number
- 10
- URI
- https://scholarworks.bwise.kr/gnu/handle/sw.gnu/3231
- DOI
- 10.3390/catal11101196
- ISSN
- 2073-4344
- Abstract
- The durability of catalysts in fuel cells is a longstanding issue that needs to be resolved. Catalyst stability of the fuel cell has always been a problem, studies are underway to address them. Herein, to address this issue, we synthesize a hybrid structure consisting of SP carbon (SP) as the graphitic carbon and TiO2 as the metal oxide using a microwave method for use as a support for Pt nanoparticles. Anatase TiO2 and Pt nanoparticles with sizes of similar to 5 and 3.5 +/- 1.4 nm, respectively, are uniformly dispersed on a modified graphitic SP carbon support (Pt-TiO2-SP). This supported Pt catalyst exhibits significantly improves durability in the oxygen reduction reaction (ORR). Furthermore, the Pt-TiO2-SP carbon hybrid catalyst manifests superior electrocatalytic stability and higher onset potential in ORR than those exhibited by Pt-SP carbon without TiO2. Pt-TiO2-SP exhibits an activity loss of less than 68 mV after 5000 electrochemical cycles, whereas an activity loss of similar to 100 mV is observed for Pt-SP carbon in a stability test. These results suggest that the strong metal-support interaction in TiO2-supported Pt catalyst significantly enhances the activity of Pt nanocatalyst.
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