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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS I22-Small angle scattering & Diffraction	Iron, nitrogen Co-doped carbon spheres as low cost, scalable electrocatalysts for the oxygen reduction reaction Jingyu Feng , Rongsheng Cai , Emanuele Magliocca , Hui Luo , Luke Higgins , Giulio L. Fumagalli Romario , Xiaoqiang Liang , Angus Pedersen , Zhen Xu , Zhenyu Guo , Arun Periasamy , Dan Brett , Thomas S. Miller , Sarah J. Haigh , Bhoopesh Mishra , Maria-Magdalena Titirici Advanced Functional Materials 324 DOI: 10.1002/adfm.202102974 Diamond Proposal Number(s): [26201, 27900] Open Access Show Abstract ▼ Abstract: Atomically dispersed transition metal-nitrogen-carbon catalysts are emerging as low-cost electrocatalysts for the oxygen reduction reaction in fuel cells. However, a cost-effective and scalable synthesis strategy for these catalysts is still required, as well as a greater understanding of their mechanisms. Herein, iron, nitrogen co-doped carbon spheres (Fe@NCS) have been prepared via hydrothermal carbonization and high-temperature post carbonization. It is determined that FeN4 is the main form of iron existing in the obtained Fe@NCS. Two different precursors containing Fe2+ and Fe3+ are compared. Both chemical and structural differences have been observed in catalysts starting from Fe2+ and Fe3+ precursors. Fe2+@NCS-A (starting with Fe2+ precursor) shows better catalytic activity for the oxygen reduction reaction. This catalyst is studied in an anion exchange membrane fuel cell. The high open-circuit voltage demonstrates the potential approach for developing high-performance, low-cost fuel cell catalysts.	Aug 2021

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B18-Core EXAFS
I22-Small angle scattering & Diffraction

Iron, nitrogen Co-doped carbon spheres as low cost, scalable electrocatalysts for the oxygen reduction reaction