Diphenylmethane-based cross-linked polyisocyanide: synthesis and application as nitrite electrochemical probe and N-doped carbon precursor


With 4,4′-diaminodiphenylmethane as the starting material, a compound (M1) containing two functional isocyanide groups was successfully prepared via Hofmann method, and a polyisocyanide derivative (P1), with a cross-linked structure, was successfully prepared via Ni2+-catalyzed polymerization. Electrochemical detection of nitrite was achieved by utilizing P1-modified glassy carbon electrode as the working electrode, and the corresponding detection limit reached ~ 0.51 μM (3σ/k). Subsequently, nitrogen-doped porous carbon material (P1-C) was obtained by direct carbonization of P1. The preliminary study of its electrochemical performance was carried out. Specific capacitance of P1-C reached 152.5 F g−1 at 0.5 A g−1, and high capacitance retention of 94.4% was recorded after 1000 galvanostatic charge–discharge cycles (at 1 A g−1), indicating that P1-C can act as potential energy storage electrode material.

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Authors greatly appreciate the financial support from the National Natural Science Foundation of China (Project No. 21774103, 21364013) and the Youth Science and Technology Innovation Team of SWPU (Nos. 2017CXTD05, 2018CXTD05).

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Zhang, K., Shi, W., Yang, C. et al. Diphenylmethane-based cross-linked polyisocyanide: synthesis and application as nitrite electrochemical probe and N-doped carbon precursor. J Mater Sci (2020).

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