Understanding hydrazine oxidation electrocatalysis on undoped carbon

Tomer Y. Burshtein, Kesha Tamakuwala, Matan Sananis, Ilya Grinberg, Nagaprasad Reddy Samala, David Eisenberg

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Carbons are ubiquitous electrocatalytic supports for various energy-related transformations, especially in fuel cells. Doped carbons such as Fe-N-C materials are particularly active towards the oxidation of hydrazine, an alternative fuel and hydrogen carrier. However, there is little discussion of the electrocatalytic role of the most abundant component - the carbon matrix - towards the hydrazine oxidation reaction (HzOR). We present a systematic investigation of undoped graphitic carbons towards the HzOR in alkaline electrolyte. Using highly oriented pyrolytic graphite electrodes, as well as graphite powders enriched in either basal planes or edge defects, we demonstrate that edge defects are the most active catalytic sites during hydrazine oxidation electrocatalysis. Theoretical DFT calculations support and explain the mechanism of HzOR on carbon edges, identifying unsaturated graphene armchair defects as the most likely active sites. Finally, these findings explain the ‘double peak’ voltammetric feature observed on many doped carbons during the HzOR.

Original languageEnglish
Pages (from-to)9897-9903
Number of pages7
JournalPhysical Chemistry Chemical Physics
Issue number17
StatePublished - 5 Apr 2022

Bibliographical note

Funding Information:
We thank the Israel Science Foundation (grant 2430/19), the Grand Technion Energy Program, the Israel National Research Center for Electrochemical Propulsion (INREP), and the Ministry of Energy (graduate scholarship program) for financial support.

Publisher Copyright:
© 2022 The Royal Society of Chemistry.


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