title: Supersaturation-controlled surface structure evolution of Pd@Pt core-shell nanocrystals: enhancement of the ORR activity at a sub-10 nm scale.
abstract: Here, we designed and implemented a facile strategy for controlling the surface evolution of Pd@Pt core-shell nanostructures by simply adjusting the volume of OH(-) to control the reducing ability of ascorbic acid and finally manipulating the supersaturation in the reaction system. The surface structure of the obtained Pd@Pt bimetallic nanocrystals transformed from a Pt {111} facet-exposed island shell to a conformal Pt {100} facet-exposed shell by increasing the pH value. The as-prepared well aligned Pd@Pt core-island shell nanocubes present both significantly enhanced electrocatalytic activity and favorable long-term stability toward the oxygen reduction reaction in alkaline media.
authors.affiliation: Department of Materials Science, Key Laboratory of Automobile Materials of MOE and State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People's Republic of China. wtzheng@jlu.edu.cn xqcui@jlu.edu.cn.
authors.forename: Kun
authors.initials: K
authors.lastname: Qi
authors.affiliation: Department of Materials Science, Key Laboratory of Automobile Materials of MOE and State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People's Republic of China. wtzheng@jlu.edu.cn xqcui@jlu.edu.cn.
authors.forename: Weitao
authors.initials: W
authors.lastname: Zheng
authors.affiliation: Department of Materials Science, Key Laboratory of Automobile Materials of MOE and State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People's Republic of China. wtzheng@jlu.edu.cn xqcui@jlu.edu.cn.
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Cui