Jung, Won Suk Lee, Woong Hee Oh, Hyung-Suk Popov, Branko N. 2024-01-19T16:31:21Z 2024-01-19T16:31:21Z 2021-09-02 2020-10-14 2050-7488 https://pubs.kist.re.kr/handle/201004/117994 A PtCo alloy catalyst was prepared by thermal diffusion of Co encapsulated with thin N-doped carbon layers on graphitic carbon into a Pt lattice (PtCo/NGC). The Co diffused up to the near-Pt surface and resulted in an intermetallic PtCo structure without the leaching process. The intermetallic PtCo structure thermally treated under optimized conditions showed 3-fold higher mass activity than the commercial Pt/C. The potential and maximum power density loss of PtCo/NGC after 30 000 potential cycles were 34 mV and 11%, respectively, which indicated that the PtCo/NGC was remarkably stable when compared to commercial Pt/C and commercial PtCo/GC catalysts. The enhanced catalytic performance and stability of the PtCo/NGC catalyst were attributed to the formation of an intermetallic structure that alleviated the Pt oxidation and Co dissolution. The outstanding performance and stability qualify the ordered intermetallic PtCo/NGC to be a promising cathode catalyst for the commercialization of fuel cells. English ROYAL SOC CHEMISTRY ONE-POT SYNTHESIS CATHODE CATALYSTS PLATINUM DISSOLUTION SURFACE-COMPOSITION TRANSITION-METALS PARTICLE-SIZE NITROGEN NANOPARTICLES ELECTROCATALYSIS PERFORMANCE Highly stable and ordered intermetallic PtCo alloy catalyst supported on graphitized carbon containing Co@CN for oxygen reduction reaction Article 10.1039/d0ta05182a 1 JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.38, pp.19833 - 19842 JOURNAL OF MATERIALS CHEMISTRY A 8 38 19833 19842 scie scopus 000575366700051 2-s2.0-85092431475 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article ONE-POT SYNTHESIS CATHODE CATALYSTS PLATINUM DISSOLUTION SURFACE-COMPOSITION TRANSITION-METALS PARTICLE-SIZE NITROGEN NANOPARTICLES ELECTROCATALYSIS PERFORMANCE Proton exchange membrane fuel cells Oxygen reduction reaction Intermetallic alloy Potential cycling Stability