Schuett Fabian M, Esau Derek, Varvaris K Liam, Gelman Shelly, Björk Jonas, Rosen Johanna, Jerkiewicz Gregory, Jacob Timo
Institute of Electrochemistry, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany.
Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada.
Angew Chem Int Ed Engl. 2020 Aug 3;59(32):13246-13252. doi: 10.1002/anie.201915389. Epub 2020 May 8.
The growth of noble-metal single crystals via the flame fusion method was developed in the 1980s. Since then, there have been no major advancements to the technique until the recent development of the controlled-atmosphere flame fusion (CAFF) method to grow non-noble Ni single crystals. Herein, we demonstrate the generality of this method with the first preparation of fcc Cu as well as the first hcp and bcc single crystals of Co and Fe, respectively. The high quality of the single crystals was verified using scanning electron microscopy and Laue X-ray backscattering. Based on Wulff constructions, the equilibrium shapes of the single-crystal particles were studied, confirming the symmetry of the fcc, hcp, and bcc single-crystal lattices. The low cost of the CAFF method makes all kinds of high-quality non-noble single crystals independent of their lattice accessible for use in electrocatalysis, electrochemistry, surface science, and materials science.
贵金属单晶通过火焰熔融法生长是在20世纪80年代发展起来的。从那时起，直到最近开发出可控气氛火焰熔融（CAFF）法来生长非贵金属镍单晶，该技术才取得重大进展。在此，我们通过首次制备面心立方（fcc）结构的铜以及首次分别制备六方密排（hcp）结构和体心立方（bcc）结构的钴和铁单晶，证明了该方法的通用性。使用扫描电子显微镜和劳厄X射线背散射验证了单晶的高质量。基于伍尔夫构造，研究了单晶颗粒的平衡形状，证实了面心立方、六方密排和体心立方单晶晶格的对称性。CAFF法的低成本使得各种高质量的非贵金属单晶，无论其晶格如何，都可用于电催化、电化学、表面科学和材料科学。
