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Effect of Carbon Black, Carbon Nanotubes and Carbon Nanohorns on Electrochemical Performance of FeCoN/C Catalyst in Low Concentration Direct Ammonia Fuel Cells

カーボンブラック、カーボンナノチューブ、カーボンナノホーンが低濃度直接アンモニア燃料電池におけるFeCoN/C触媒の電気化学性能に与える影響 (AI 翻訳)

Muhammad Javed Iqbal, Li-Wei Tseng, Fa-Cheng Su, Qaiser Abbas, Hsiharng Yang

Electrochem📚 査読済 / ジャーナル2026-06-12#水素
DOI: 10.3390/electrochem7020014
原典: https://doi.org/10.3390/electrochem7020014

🤖 gxceed AI 要約

日本語

本研究では、直接アンモニア燃料電池の高性能化に向けて、FeCoN触媒のカーボン担体最適化を検討。カーボンブラック（XC-72R）がカーボンナノチューブやナノホーンよりも優れた活性と低抵抗を示し、最大出力密度71 mW/cm2を達成。この結果は、低濃度アンモニア燃料電池の実用化に向けた触媒設計指針となる。

English

This study optimizes carbon supports for FeCoN catalysts in direct ammonia fuel cells. Carbon black (XC-72R) outperforms carbon nanotubes and carbon nanohorns, achieving the highest power density of 71 mW/cm2 with low resistance. The findings guide cathode catalyst design for next-generation low-concentration ammonia fuel cells.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本は水素社会実現に向けアンモニア燃料の利用を推進中。本研究成果は触媒コスト低減に寄与し、国内の燃料電池開発に示唆を与える。

In the global GX context

Globally, direct ammonia fuel cells are a carbon-free energy solution. This paper provides empirical data on carbon support selection, advancing the commercialization of ammonia-based power generation.

👥 読者別の含意

🔬研究者:Materials scientists and electrochemists can use the comparative performance data to guide catalyst support selection for ammonia fuel cells.

📄 Abstract（原文）

Direct ammonia fuel cells (DAFCs) offer a promising pathway for carbon-free energy conversion but their practical performance is limited by sluggish cathode kinetics. In this work, non-precious FeCoN catalysts offer a cost-effective solution, yet carbon support optimization is crucial for activity and stability. FeCoN/XC-72R, FeCoN/CNT, and FeCoN/CNH cathode catalysts were synthesized by annealing at 550–750 °C. Their structure and morphology were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Electrochemical behavior was evaluated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in alkaline medium containing KOH and NH4OH. FeCoN/XC-72R exhibited the lowest resistance of 27 Ω and superior activity. In single cell tests using a 40 wt% PtIr/C anode catalyst at 2 mg cm−2, the FeCoN/XC-72R catalyst achieved the highest power density of 71 mW/cm2 under optimized conditions of 0.1M NH4OH + 3M KOH, 100 °C, and O2 feed. Among the carbon supports, carbon black (XC-72R) proved the most effective support for FeCoN catalysts in low concentration DAFCs, outperforming carbon nanotubes (CNTs) and carbon nanohorns (CNHs). These findings highlight the importance of carbon support selection in the design of efficient cathodes for next generation low concentration direct ammonia fuel cells.

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