Selective Epitaxial Growth of Rh Nanorods on 2H/fcc Heterophase Au Nanosheets to Form 1D/2D Rh–Au Heterostructures for Highly Efficient Hydrogen Evolution

• DOI: 10.1021/jacs.1c00612
• Publication Date: 2021-03-11T14:52:27Z
• Authors: Jiawei Liu; Wenxin Niu; Guigao Liu; Bo Chen; Jingtao Huang; Hongfei Cheng; Dianyi Hu; Jie Wang; Qing Liu; Jingjie Ge; Pengfei Yin; Fanqi Meng; Qinghua Zhang; Lin Gu; Qipeng Lu; Hua Zhang
• Keywords: Nanorod; Nanomaterials; Nanosheet; Template

Phase engineering of nanomaterials (PEN) enables the preparation metal with unconventional phases that are different from their thermodynamically stable counterparts. These unconventional-phase can serve as templates to construct precisely controlled metallic heterostructures for wide applications. Nevertheless, how phase affects nucleation and growth secondary metals still requires systematic explorations. Here, two-dimensional (2D) square-like Au nanosheets an 2H/face-centered cubic (fcc) heterophase, composing two pairs opposite edges 2H/fcc heterophase fcc phase, respectively, basal planes, prepared then used grow one-dimensional (1D) Rh nanorods. The effect in regions on overgrowth nanorods has been systematically investigated. By tuning reaction conditions, three types 1D/2D Rh–Au prepared. In type A heterostructure, only defects including stacking faults and/or twin boundaries (denoted fcc-SF/T) 2H nanosheet. B fcc-SF/T planes C four Furthermore, heterostructure shows promising performance toward electrochemical hydrogen evolution (HER) acidic media, which is among best reported Rh-based other noble-metal-based HER electrocatalysts.