In Situ Pyrolysis Tracking and Real-Time Phase Evolution: From a Binary Zinc Cluster to Supercapacitive Porous Carbon |
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| Authors: | Yi-Fan Wang Yiyu Liang Yan-Fang Wu Jian Yang Xu Zhang Dr. Dandan Cai Dr. Xu Peng Dr. Mohamedally Kurmoo Prof. Dr. Ming-Hua Zeng |
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| Affiliation: | 1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry & Chemical Engineering, Hubei University, Wuhan, 430062 P. R. China;2. School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Guilin, 541004 P. R. China;3. Université de Strasbourg, CNRS-UMR7177, Institut de Chimie de Strasbourg, 4 rue Blaise Pascal, 67008 Strasbourg, France |
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| Abstract: | The in situ tracking of the pyrolysis of a binary molecular cluster [Zn7(μ3-CH3O)6(L)6][ZnLCl2]2 is presented with one brucite disk and two mononuclear fragments (L=mmimp: 2-methoxy-6-((methylimino)-methyl)phenolate) to porous carbon using TG-MS from 30 to 900 °C. Following up the spilled gas product during the decomposed reaction of zinc cluster along the temperature rising, and in conjunction with XRD, SEM, BET and other materials characterization, where three key steps were observed: 1) cleavage of the bulky external ligand; 2) reduction of ZnO and 3) volatilization of Zn. The real-time-dependent phase-sequential evolution of the remaining products and the processing of pore forming template transformation are proposed simultaneously. The porous carbon structure featuring a uniform nano-sized pore distribution synthesized at 900 °C with the highest surface area of 1644 m2 g−1 and pore volume of 0.926 cm3 g−1 exhibits the best known capacitance of 662 F g−1 at 0.5 A g−1. |
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| Keywords: | binary zinc clusters phase evolution pyrolysis tracking supercapacitive behavior |
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