title: Scalable Nanoporous (Pt1-xNix)3Al Intermetallic Compounds as Highly Active and Stable Catalysts for Oxygen Electroreduction.
abstract: Author: Bimetallic platinum-nickel (Pt-Ni) alloys as oxygen reduction reaction (ORR) electrocatalysts show genuine potential to boost widespread use of low-temperature fuel cells in vehicles by virtue of their high catalytic activity. However, their practical implementation encounters primary challenges in structural and catalytic durability caused by the low formation heat of Pt-Ni alloys. Here, we report nanoporous (NP) (Pt1-xNix)3Al intermetallic nanoparticles as oxygen electroreduction catalyst NP (Pt1-xNix)3Al, which circumvents this problem by making use of the extraordinarily negative formation heats of Pt-Al and Ni-Al bonds. The NP (Pt1-xNix)3Al nanocatalyst, which is mass-produced by alloying/dealloying and mechanical crushing technologies, exhibits specific activity of 3.6 mA cm-2Ptand mass activity of 2.4 A mg-1Ptat 0.90 V as a result of both ligand and compressive strain effects, while strong Ni-Al and Pt-Al bonds ensure their exceptional durability by alleviating evolution of Pt, Ni, and Al components and dissolutions of Ni and Al atoms.
authors.affiliation: Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University , Changchun 130022, China.
authors.forename: Gao-Feng
authors.initials: GF
authors.lastname: Han
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, The Institute of Physics, Chinese Academy of Science , Beijing 100190, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University , Changchun 130022, China.
authors.forename: Xing-You
authors.initials: XY
authors.lastname: Lang
authors.affiliation: Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University , Changchun 130022, China.
authors.forename: Bei-Bei
authors.initials: BB
authors.lastname: Xiao
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, The Institute of Physics, Chinese Academy of Science , Beijing 100190, China.
authors.forename: Zhen-Zhong
authors.initials: ZZ
authors.lastname: Yang
authors.affiliation: Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University , Changchun 130022, China.
authors.forename: Zi
authors.initials: Z
authors.lastname: Wen
authors.affiliation: Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and School of Materials Science and Engineering, Jilin University , Changchun 130022, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Jiang
keywords: dealloying; electrocatalysis; fuel cells; intermetallic compounds; nanoporous metals; oxygen reduction reaction; platinum alloys