title: Rational design of Pt-Ni-Co ternary alloy nanoframe crystals as highly efficient catalysts toward the alkaline hydrogen evolution reaction.
abstract: The rational design of highly efficient electrocatalysts for the hydrogen evolution reaction (HER) is of prime importance for establishing renewable and sustainable energy systems. The alkaline HER is particularly challenging as it involves a two-step reaction of water dissociation and hydrogen recombination, for which platinum-based binary catalysts have shown promising activity. In this work, we synthesized high performance platinum-nickel-cobalt alloy nanocatalysts for the alkaline HER through a simple synthetic route. This ternary nanostructure with a Cartesian-coordinate-like hexapod shape could be prepared by a one-step formation of core-dual shell Pt@Ni@Co nanostructures followed by a selective removal of the Ni@Co shell. The cobalt precursor brings about a significant impact on the control of size and shape of the nanostructure. The PtNiCo nanohexapods showed a superior alkaline HER activity to Pt/C and binary PtNi hexapods, with 10 times greater specific activity than Pt/C. In addition, the PtNiCo nanohexapods demonstrated excellent activity and durability for the oxygen reduction reaction in acidic media.
authors.affiliation: Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Korea and Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea. kylee1@korea.ac.kr.
authors.forename: Aram
authors.initials: A
authors.lastname: Oh
authors.affiliation: Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. shjoo@unist.ac.kr.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Sa
authors.affiliation: Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Korea and Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea. kylee1@korea.ac.kr.
authors.forename: Hyeyoun
authors.initials: H
authors.lastname: Hwang
authors.affiliation: Korea Basic Science Institute (KBSI), Seoul 02841, Korea.
authors.forename: Hionsuck
authors.initials: H
authors.lastname: Baik
authors.affiliation: Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Korea and Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea. kylee1@korea.ac.kr.
authors.forename: Jun
authors.initials: J
authors.lastname: Kim
authors.affiliation: Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Korea and Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea. kylee1@korea.ac.kr.
authors.forename: Byeongyoon
authors.initials: B
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea. shjoo@unist.ac.kr.
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Joo
authors.affiliation: Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Korea and Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea. kylee1@korea.ac.kr.
authors.forename: Kwangyeol
authors.initials: K
authors.lastname: Lee