Elucidating the electro-catalytic oxidation of hydrazine over carbon nanotube-based transition metal single atom catalysts.

Release time:2022-02-22

Impact Factor:8.18

DOI number:10.1007/s12274-021-3397-9

Journal:Nano Research

Abstract:Elucidating the reaction mechanism of hydrazine oxidation reaction (HzOR) over carbon-based catalysts is highly propitious for the rational design of novel electrocatalysts for HzOR. In present work, isolated first-row transition metal atoms have been coordinated with N atoms on the graphite layers of carbon nanotubes via a M-N4-C configuration (MSA/CNT, M=Fe, Co and Ni). The HzOR over the three single atom catalysts follows a predominant 4-electron reaction pathway to emit N2 and a negligible 1-electron pathway to emit trace of NH3, while their electrocatalytic activity for HzOR is dominated by the absorption energy of N2H4 on them. Furthermore, FeSA/CNT reverses the passivation effect on Fe/C and shows superior performance than CoSA/CNT and NiSA/CNT with a recorded high mass activity for HzOR due to the higher electronic charge of Fe over Co and Ni in the M-N4-C configuration and the lowest absorption energy of N2H4 on FeSA/CNT among the three MSA/CNT catalysts.

Indexed by:Journal paper

Volume:14

Page Number:4650–4657

Translation or Not:no

Date of Publication:2021-03-21

Links to published journals:https://doi.org/10.1007/s12274-021-3397-9