Structural Engineering of Ultrathin ReS<sub>2</sub> on Hierarchically Architectured Graphene for Enhanced Oxygen Reduction.
basic_science · Level V
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- Record sourced from PubMed, PMID 33621465.
- Also identified by DOI 10.1021/acsnano.1c00420.
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Abstract
Herein, binary heteronanosheets made of ultrathin ReS<sub>2</sub> nanosheets and reduced graphene oxide (RGO) with either a two-dimensional (2D) "sheet-on-sheet" architecture (2D ReS<sub>2</sub>/RGO) or a three-dimensional hierarchical structure (3D ReS<sub>2</sub>/RGO) are constructed through rational structure-engineering strategies. In the resultant 3D ReS<sub>2</sub>/RGO heteronanosheets, the ultrathin ReS<sub>2</sub> nanosheets are bridged on the RGO surface through Re-O bonds in a vertically oriented manner, which endows the heteronanosheets with open frameworks and a hierarchical porous structure. In sharp contrast to the 2D ReS<sub>2</sub>/RGO, the 3D ReS<sub>2</sub>/RGO heteronanosheets are featured with abundant active sites and channels for efficient electrolyte ions transport. This, coupled with the strong affinity toward oxygen-containing intermediates intrinsically associated with the binary ReS<sub>2</sub>/RGO structure, imparts excellent oxygen reduction performance to the 3D ReS<sub>2</sub>/RGO heteronanosheets for potential applications in fuel cells and metal-air batteries.