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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS E01-JEM ARM 200CF	Hemoglobin-derived Fe-Nx-S species supported by bamboo-shaped carbon nanotubes as efficient electrocatalysts for the oxygen evolution reaction Weiming Chen , Xuanli Luo , Sanliang Ling , Yongfang Zhou , Bihan Shen , Thomas J. A. Slater , Jesum Alves Fernandes , Tingting Lin , Jianshe Wang , Yi Shen Carbon DOI: 10.1016/j.carbon.2020.06.064 Diamond Proposal Number(s): [23723, 17198] Show Abstract ▼ Abstract: Herein, we report a facile route to synthesize isolated single iron atoms on nitrogen-sulfur-codoped carbon matrix via a direct pyrolysis process in which hemoglobin, a by-product of the meat industry, was utilized as a precursor for iron, nitrogen and sulfur while bamboo-shaped carbon nanotubes served as a support owing to their excellent conductivity and numerous defects. The resulting metal-nitrogen complexed carbon showed outstanding catalytic performance for the oxygen evolution reaction (OER) in alkaline solutions. At an overpotential of 380 mV, the optimal sample yielded a current density of 83.6 mA cm−2, which is 2.5 times that of benchmark IrO2 (32.8 mA cm−2), rendering it as one of the best OER catalysts reported so far. It also showed negligible activity decay in alkaline solutions during long-term durability tests. Control experiments and X-ray absorption fine structure analyses revealed that Fe-Nx species in the samples are the active sites for OER. Further density functional theory calculations indicated that the presence of sulfur in the carbon matrix modified the electronic structures of active species, thereby leading to the superior activity of the sample.	Jun 2020

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B18-Core EXAFS
E01-JEM ARM 200CF

Hemoglobin-derived Fe-Nx-S species supported by bamboo-shaped carbon nanotubes as efficient electrocatalysts for the oxygen evolution reaction

Weiming Chen , Xuanli Luo , Sanliang Ling , Yongfang Zhou , Bihan Shen , Thomas J. A. Slater , Jesum Alves Fernandes , Tingting Lin , Jianshe Wang , Yi Shen

Carbon

DOI: 10.1016/j.carbon.2020.06.064

Diamond Proposal Number(s): [23723, 17198]

Show Abstract ▼

Jun 2020