Park, Hee-Young Jeon, Tae-Yeol Lee, Kug-Seung Yoo, Sung Jong Sung, Young-Eun Jang, Jong Hyun 2024-01-20T03:00:30Z 2024-01-20T03:00:30Z 2021-09-04 2016-12 2093-8551 https://pubs.kist.re.kr/handle/201004/123390 Carbon-supported ordered Pt-Ti alloy nanoparticles were prepared as a durable and efficient oxygen reduction reaction (ORR) electrocatalyst for polymer electrolyte membrane fuel cells (PEMFCs) via wet chemical reduction of Pt and Ti precursors with heat treatment at 800 degrees C. X-ray diffraction analysis confirmed that the prepared electrocatalysts with Ti precursor molar compositions of 40% (PtTi40) and 25% (PtTi25) had ordered Pt3Ti and Pt8Ti structures, respectively. Comparison of the ORR polarization before and after 1500 electrochemical cycles between 0.6 and 1.1 V showed little change in the ORR polarization curve of the electrocatalysts, demonstrating the high stability of the PtTi40 and PtTi25 alloys. Under the same conditions, commercial carbon-supported Pt nanoparticle electrocatalysts exhibited a negative potential shift (10 mV) in the ORR polarization curve after electrochemical cycling, indicating degradation of the ORR activity. English KOREAN ELECTROCHEMISTRY SOC PT3TI NANOPARTICLES STABILITY DURABILITY OXIDATION CATALYSTS INTERMETALLICS ENHANCEMENT MECHANISMS Carbon-Supported Ordered Pt-Ti Alloy Nanoparticles as Durable Oxygen Reduction Reaction Electrocatalyst for Polymer Electrolyte Membrane Fuel Cells Article 10.5229/JECST.2016.7.4.269 1 JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY, v.7, no.4, pp.269 - 276 JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY 7 4 269 276 scie scopus 000398291300004 2-s2.0-85024382877 Electrochemistry Electrochemistry Article PT3TI NANOPARTICLES STABILITY DURABILITY OXIDATION CATALYSTS INTERMETALLICS ENHANCEMENT MECHANISMS Oxygen reduction reaction Electrocatalyst Platinum-titanium alloy Durability Polymer electrolyte membrane fuel cell