Details

Autor(en) / Beteiligte

• Pan, Fei
• Ni, Kun
• Xu, Tao
• Chen, Huaican
• Wang, Yusong
• Gong, Ke
• Liu, Cai
• Li, Xin
• Lin, Miao-Ling
• Li, Shengyuan
• Wang, Xia
• Yan, Wensheng
• Yin, Wen
• Tan, Ping-Heng
• Sun, Litao
• Yu, Dapeng
• Ruoff, Rodney S
• Zhu, Yanwu

Titel

Long-range ordered porous carbons produced from C 60

Ist Teil von

• Nature (London), 2023-02, Vol.614 (7946), p.95

Ort / Verlag

England

Erscheinungsjahr

2023

Link zum Volltext

Beschreibungen/Notizen

• Carbon structures with covalent bonds connecting C molecules have been reported , but their production methods typically result in very small amounts of sample, which restrict the detailed characterization and exploration necessary for potential applications. We report the gram-scale preparation of a new type of carbon, long-range ordered porous carbon (LOPC), from C powder catalysed by α-Li N at ambient pressure. LOPC consists of connected broken C cages that maintain long-range periodicity, and has been characterized by X-ray diffraction, Raman spectroscopy, magic-angle spinning solid-state nuclear magnetic resonance spectroscopy, aberration-corrected transmission electron microscopy and neutron scattering. Numerical simulations based on a neural network show that LOPC is a metastable structure produced during the transformation from fullerene-type to graphene-type carbons. At a lower temperature, shorter annealing time or by using less α-Li N, a well-known polymerized C crystal forms owing to the electron transfer from α-Li N to C . The carbon K-edge near-edge X-ray absorption fine structure shows a higher degree of delocalization of electrons in LOPC than in C (s). The electrical conductivity is 1.17 × 10  S cm at room temperature, and conduction at T < 30  K appears to result from a combination of metallic-like transport over short distances punctuated by carrier hopping. The preparation of LOPC enables the discovery of other crystalline carbons starting from C (s).