Hydrazine detection during ammonia electro-oxidation using an aggregation-induced emission dye

Kumar SIDDHARTH, Parvej ALAM, Md Delowar HOSSAIN, Ni XIE, Gabriel Sikukuu NAMBAFU, Faisal REHMAN, Jacky W.Y. LAM, Guohua CHEN, Jinping CHENG, Zhengtang LUO, Guanghao CHEN, Ben Zhong TANG, Minhua SHAO

Research output: Contribution to journalArticlespeer-review

40 Citations (Scopus)

Abstract

Ammonia electro-oxidation is an extremely significant reaction with regards to the nitrogen cycle, hydrogen economy, and wastewater remediation. The design of efficient electrocatalysts for use in the ammonia electro-oxidation reaction (AOR) requires comprehensive understanding of the mechanism and intermediates involved. In this study, aggregation-induced emission (AIE), a robust fluorescence sensing platform, is employed for the sensitive and qualitative detection of hydrazine (N₂H₄), one of the important intermediates during the AOR. Here, we successfully identified N₂H₄ as a main intermediate during the AOR on the model Pt/C electrocatalyst using 4-(1,2,2-triphenylvinyl)benzaldehyde (TPE-CHO), an aggregation-induced emission luminogen (AIEgen). We propose the AOR mechanism for Pt with N₂H₄ being formed during the dimerization process (NH₂ coupling) within the framework of the Gerischer and Mauerer mechanism. The unique chemodosimeter approach demonstrated in this study opens a novel pathway for understanding electrochemical reactions in depth. Copyright © 2021 American Chemical Society.
Original languageEnglish
Pages (from-to)2433-2440
JournalJournal of the American Chemical Society
Volume143
Issue number5
Early online date28 Jan 2021
DOIs
Publication statusPublished - 10 Feb 2021

Citation

Siddharth, K., Alam, P., Hossain, M. D., Xie, N., Nambafu, G. S., Rehman, F., . . . Shao, M. (2021). Hydrazine detection during ammonia electro-oxidation using an aggregation-induced emission dye. Journal of the American Chemical Society, 143(5), 2433-2440. doi: 10.1021/jacs.0c13178

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