Affiliation:
1. Key Laboratory of Cluster Science Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Advanced Technology Research Institute (Jinan) School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China
2. Department Beijing Advanced Innovation Center for Intelligent Robots and Systems School of Medical Technology Beijing Institute of Technology Beijing 100081 P. R. China
3. Analysis and Testing Center Beijing Institute of Technology Beijing 100081 P. R. China
Abstract
AbstractTwo‐dimensional low‐melting‐point (LMP) metal nanocrystals are attracting increasing attention with broad and irreplaceable applications due to their unique surface and topological structures. However, the chemical synthesis, especially the fine control over the nucleation (reduction) and growth (crystallization), of such LMP metal nanocrystals remains elusive as limited by the challenges of low standard redox potential, low melting point, poor crystalline symmetry, etc. Here, a controllable reduction‐melting‐crystallization (RMC) protocol to synthesize free‐standing and surfactant‐free bismuth nanocrystals with tunable dimensions, morphologies, and surface structures is presented. Especially, ultrathin bismuth nanosheets with flat or jagged surfaces/edges can be prepared with high selectivity. The jagged bismuth nanosheets, with abundant surface steps and defects, exhibit boosted electrocatalytic CO2 reduction performances in acidic, neutral, and alkaline aqueous solutions, achieving the maximum selectivity of near unity at the current density of 210 mA cm–2 for formate evolution under ambient conditions. This work creates the RMC pathway for the synthesis of free‐standing two‐dimensional LMP metal nanomaterials and may find broader applicability in more interdisciplinary applications.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Beijing Municipal Natural Science Foundation
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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