A Multi-Doped Electrocatalyst for Efficient Hydrazine Oxidation

Kasinath Ojha, Eliyahu M. Farber, Tomer Y. Burshtein, David Eisenberg

Research output: Contribution to journalArticlepeer-review

Abstract

We report an efficient electrocatalyst for the oxidation of hydrazine, a promising fuel for fuel cells and an important analyte for health and environmental monitoring. To design this material, we emulated natural nitrogen-cycle enzymes, focusing on designing a cooperative, multi-doped active site. The catalytic oxidation occurs on Fe2MoC nanoparticles and on edge-positioned nitrogen dopants, all well-dispersed on a hierarchically porous, graphitic carbon matrix that provides active site exposure to mass-transfer and charge flow. The new catalyst is the first carbide with HzOR activity. It operates at the most negative onset potentials reported for carbon-based HzOR catalysts at pH 14 (0.28 V vs. RHE), and has good-to-excellent activity at pH values down to 0. It shows high faradaic efficiency for oxidation to N2 (3.6 e/N2H4), and is perfectly stable for at least 2000 cycles.

Original languageEnglish
Pages (from-to)17168-17172
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number52
DOIs
StatePublished - 21 Dec 2018

Keywords

  • N-doped carbon
  • biomimetic catalysis
  • carbide
  • electrocatalysis
  • hydrazine

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Catalysis

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