Bae, Sung Jong Yoo, Sung Jong Lim, Yuntaek Kim, Sojeong Lim, Yirang Choi, Junghun Nahm, Kee Suk Hwang, Seung Jun Lim, Tae-Hoon Kim, Soo-Kil Kim, Pil 2024-01-20T15:01:48Z 2024-01-20T15:01:48Z 2021-09-04 2012-05 0959-9428 https://pubs.kist.re.kr/handle/201004/129318 To design Pt-based materials with a hollow structure via a galvanic reaction would be one of the effective ways to prepare electro-catalysts with high activity. The galvanic reaction between Pt ions and metal template is usually conducted under limited conditions, which makes the preparation of Pt hollow nanoparticles laborious. Here, we introduce a one-step and one-pot synthetic approach for the preparation of carbon-supported PtNi alloy hollow nanoparticles with a narrow size distribution. Prepared PtNi alloys were characterized by a nonporous shell consisting of a Pt-enriched surface layer and an inner alloy layer of Pt and Ni. Due to its unique structural advantages, this material showed excellent electrocatalytic performance for oxygen reduction (3.3- and 7.8-fold enhanced mass and specific activities compared to those of a commercial carbon-supported Pt nanoparticle). A possible mechanism for the formation of PtNi hollow structure is suggested. English ROYAL SOC CHEMISTRY OXYGEN REDUCTION REACTION CATALYSTS SPHERES ALLOY GOLD ELECTROCATALYSTS MORPHOLOGY Facile preparation of carbon-supported PtNi hollow nanoparticles with high electrochemical performance Article 10.1039/c2jm16827h 1 JOURNAL OF MATERIALS CHEMISTRY, v.22, no.18, pp.8820 - 8825 JOURNAL OF MATERIALS CHEMISTRY 22 18 8820 8825 scie scopus 000302634800014 2-s2.0-84859826610 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article OXYGEN REDUCTION REACTION CATALYSTS SPHERES ALLOY GOLD ELECTROCATALYSTS MORPHOLOGY 연료전지 PtNi alloy catalysts Hollow nanoparticles 산소환원반응