Unraveling the Catalytic Graphitization Mechanism of Ni-P Electroless Plated Cokes via In Situ Analytical Approaches.

Autor:	Choi GB; Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea., Ahn JR; Industrialization Division, Korea Carbon Industry Promotion Agency (KCARBON), 110-11 Banryong-ro, Deokjin-gu, Jeonju 54853, Republic of Korea., Kim J; Carbon & Light Materials Application Research Group, Korea Institute of Industrial Technology (KITECH), 222 Palbok-ro, Deokjin-gu, Jeonju 54853, Republic of Korea., Seo TH; Green Energy & Nano Technology R&D Group, KITECH, 6 Cheomdan-gwagiro 208-gil, Buk-gu, Gwangju 61012, Republic of Korea., Lee SW; Industrialization Division, Korea Carbon Industry Promotion Agency (KCARBON), 110-11 Banryong-ro, Deokjin-gu, Jeonju 54853, Republic of Korea.
Jazyk:	angličtina
Zdroj:	ACS omega [ACS Omega] 2024 Jan 31; Vol. 9 (6), pp. 6741-6748. Date of Electronic Publication: 2024 Jan 31 (Print Publication: 2024).
DOI:	10.1021/acsomega.3c07692
Abstrakt:	We elucidate the catalytic graphitization mechanism using in situ analytical approaches. Catalytic graphitization is achieved through a Ni-P electroless plating process at a relatively low temperature of 1600 °C, which allows for a high crystallinity of coke. We also employ an ultrasonic treatment during the Ni-P electroless plating stage to effectively form metal layers on the surface. The impact of the ultrasonic treatment on the Ni-P electroless plating is confirmed by field emission scanning electron microscopy images of the cross-section and an elemental composition analysis using energy dispersive X-ray spectroscopy mapping. Structural analysis of the graphitized cokes via X-ray diffraction (XRD) and Raman spectroscopy shows that Ni-P electroless plating significantly accelerates the graphitization process. Furthermore, we illuminate the graphitization behavior through in situ transmission electron microscopy and XRD analysis. Nickel layers on the coke surface facilitate graphite formation by encouraging the dissolution and precipitation of amorphous carbons, thus resulting in efficient graphitization at a relatively low temperature. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu