Kim, Hyun Cho, Min Kyung Kwon, Jeong An Jeong, Yeon Hun Lee, Kyung Jin Kim, Na Young Kim, Min Jung Yoo, Sung Jong Jang, Jong Hyun Kim, Hyoung-Juhn Nam, Suk Woo Lim, Dong-Hee Cho, EunAe Lee, Kwan-Young Kim, Jin Young 2024-01-20T05:34:33Z 2024-01-20T05:34:33Z 2021-09-05 2015-11 2040-3364 https://pubs.kist.re.kr/handle/201004/124812 To date, carbon-based materials including various carbon nanostructured materials have been extensively used as an electrocatalyst support for proton exchange membrane fuel cell (PEMFC) applications due to their practical nature. However, carbon dissolution or corrosion caused by high electrode potential in the presence of O-2 and/or water has been identified as one of the main failure modes for the device operation. Here, we report the first TiN nanofiber (TNF)-based nonwoven structured materials to be constructed via electro-spinning and subsequent two-step thermal treatment processes as a support for the PEMFC catalyst. Pt catalyst nanoparticles (NPs) deposited on the TNFs (Pt/TNFs) were electrochemically characterized with respect to oxygen reduction reaction (ORR) activity and durability in an acidic medium. From the electrochemical tests, the TNF-supported Pt catalyst was better and more stable in terms of its catalytic performance compared to a commercially available carbon-supported Pt catalyst. For example, the initial oxygen reduction performance was comparable for both cases, while the Pt/TNF showed much higher durability from an accelerated degradation test (ADT) configuration. It is understood that the improved catalytic roles of TNFs on the supported Pt NPs for ORR are due to the high electrical conductivity arising from the extended connectivity, high inertness to the electrochemical environment and strong catalyst-support interactions. English ROYAL SOC CHEMISTRY PT/C CATALYTIC CATHODE PEM FUEL-CELLS TITANIUM NITRIDE DURABILITY ENHANCEMENT CARBON SUPPORT NANOPARTICLES PERFORMANCE OXIDATION CORROSION Highly efficient and durable TiN nanofiber electrocatalyst supports Article 10.1039/c5nr04082e 1 NANOSCALE, v.7, no.44, pp.18429 - 18434 NANOSCALE 7 44 18429 18434 scie scopus 000364824000007 2-s2.0-84946829651 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article PT/C CATALYTIC CATHODE PEM FUEL-CELLS TITANIUM NITRIDE DURABILITY ENHANCEMENT CARBON SUPPORT NANOPARTICLES PERFORMANCE OXIDATION CORROSION