Liu Nana, Bo Guyue, Liu Yani, Xu Xun, Du Yi, Dou Shi Xue
Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW, 2500, Australia.
BUAA-UOW Joint Research Centre, and School of Physics, Beihang University, Beijing, 10191, P. R. China.
Small. 2019 Aug;15(32):e1805147. doi: 10.1002/smll.201805147. Epub 2019 Feb 13.
A new family of single-atom-thick 2D germanium-based materials with graphene-like atomic arrangement, germanene and functionalized germanene, has attracted intensive attention due to their large bandgap and easily tailored electronic properties. Unlike carbon atoms in graphene, germanium atoms tend to adopt mixed sp /sp hybridization in germanene, which makes it chemically active on the surface and allows its electronic states to be easily tuned by chemical functionalization. Impressive achievements in terms of the applications in energy storage and catalysis have been reported by using germanene and functionalized germanene. Herein, the fabrication of epitaxial germanene on different metallic substrates and its unique electronic properties are summarized. Then, the preparation strategies and the fundamental properties of hydrogen-functionalized germanene (germanane or GeH) and other ligand-terminated forms of germanene are presented. Finally, the progress of their applications in energy storage and catalysis, including both experimental results and theoretical predictions, is analyzed.
一类具有类石墨烯原子排列的新型单原子厚二维锗基材料——锗烯及其功能化衍生物，因其具有较大的带隙和易于调节的电子性质而备受关注。与石墨烯中的碳原子不同，锗烯中的锗原子倾向于采用sp/sp混合杂化，这使得其表面具有化学活性，并使其电子态易于通过化学功能化进行调节。利用锗烯及其功能化衍生物在能量存储和催化应用方面已取得了令人瞩目的成果。本文总结了在不同金属衬底上外延生长锗烯的制备方法及其独特的电子性质。然后，介绍了氢功能化锗烯（锗烷或GeH）及其他配体终止形式的锗烯的制备策略和基本性质。最后，分析了它们在能量存储和催化应用方面的进展，包括实验结果和理论预测。
