@article{1b0280353cd24169bebe53df8787f67d,
title = "Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts",
abstract = "Nanoframe alloy structures represent a class of high-performance catalysts for the oxygen reduction reaction (ORR), owing to their high active surface area, efficient molecular accessibility, and nanoconfinement effect. However, structural and chemical instabilities of nanoframes remain an important challenge. Here, we report the synthesis of PtCu nanoframes constructed with an atomically ordered intermetallic structure (O-PtCuNF/C) showing high ORR activity, durability, and chemical stability. We rationally designed the O-PtCuNF/C catalyst by combining theoretical composition predictions with a silica-coating-mediated synthesis. The O-PtCuNF/C combines intensified strain and ligand effects from the intermetallic PtCu L11 structure and advantages of the nanoframes, resulting in superior ORR activity to disordered alloy PtCu nanoframes (D-PtCuNF/C) and commercial Pt/C catalysts. Importantly, the O-PtCuNF/C showed the highest ORR mass activity among PtCu-based catalysts. Furthermore, the O-PtCuNF/C exhibited higher ORR durability and far less etching of constituent atoms than D-PtCuNF/C and Pt/C, attesting to the chemically stable nature of the intermetallic structure.",
keywords = "electrocatalyst, intermetallic, nanoframe, oxygen reduction reaction",
author = "Kim, {Ho Young} and Taehyun Kwon and Yoonhoo Ha and Minki Jun and Hionsuck Baik and Jeong, {Hu Young} and Hyungjun Kim and Kwangyeol Lee and Joo, {Sang Hoon}",
note = "Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306 and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Funding Information: This paper is dedicated to Prof. Ryong Ryoo on the occasion of his 65th birthday. This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2015M1A2A2056560, NRF-2019M3E6A1064521, NRF-2019M3D1A1079306, and NRF-2019M1A2A2065614). T.K., M.J., and K.L. were supported by the NRF of Korea (NRF-2020R1A2B5B03002475). Y.H. and H.K. acknowledge the support by the NRF of Korea (NRF-2017M1A2A2092564). We also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = oct,
day = "14",
doi = "10.1021/acs.nanolett.0c02812",
language = "English",
volume = "20",
pages = "7413--7421",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "10",
}