Understanding the Mechanism of Fe-N-C Catalyst Oxygen Reduction Reaction Performance Enhancement: The Impact of Iron Valence State and Nitrogen Content.

• Tác giả: Yao Ge, Yuan He, Jun Li, Qiang Liao, Yang Xu, Yang Yang, Yudong Zhang, Xun Zhu
• Ngôn ngữ: eng
• Ký hiệu phân loại: 582 Plants noted for specific vegetative characteristics and flowers
• Thông tin xuất bản: United States : ACS applied materials & interfaces , 2025
• Bộ sưu tập: NCBI
• ID: 708668

Tóm tắt

Optimizing non-noble catalysts for the oxygen reduction reaction (ORR) is crucial for advancing energy storage and conversion technologies. This study investigates the influence of iron valence states and nitrogen precursor contents on the physicochemical properties and electrochemical performance of lignin-based Fe-N-C catalysts. Catalysts are synthesized using different valence iron sources and varying pyrrole contents. The results reveal that iron(II) doping increases microporosity and specific surface area, while iron(III) doping enhances mesoporous and iron contents of the carbon materials. XPS and Raman spectroscopy confirm the successful incorporation of Fe-N