Hydrazine Detection during Ammonia Electro-oxidation Using an Aggregation-Induced Emission Dye

Kumar Siddharth, Aprvej Alam, Md Delowar Hossain, Ni Xie, Gabriel Nambafu, Faisal Rehman, Jacky Lam, Guohua Chen, Jinping Cheng, Zhengtang Luo, Guanghao Chen, Benzhong Tang, Minhua Shao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)2433-2440
Number of pages8
JournalJournal of the American Chemical Society
Issue number5
Publication statusPublished - 10 Feb 2021

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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