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Your search keyword '"Sougrati, Moulay Tahar"' showing total 8 results
Start Over Author "Sougrati, Moulay Tahar" Journal journal of the american chemical society
8 results on '"Sougrati, Moulay Tahar"'

1. Chemical Kinetic Method for Active-Site Quantification in Fe-N-C Catalysts and Correlation with Molecular Probe and Spectroscopic Site-Counting Methods

Author

Bates, Jason S., primary, Martinez, Jesse J., additional, Hall, Melissa N., additional, Al-Omari, Abdulhadi A., additional, Murphy, Eamonn, additional, Zeng, Yachao, additional, Luo, Fang, additional, Primbs, Mathias, additional, Menga, Davide, additional, Bibent, Nicolas, additional, Sougrati, Moulay Tahar, additional, Wagner, Friedrich E., additional, Atanassov, Plamen, additional, Wu, Gang, additional, Strasser, Peter, additional, Fellinger, Tim-Patrick, additional, Jaouen, Frédéric, additional, Root, Thatcher W., additional, and Stahl, Shannon S., additional

Published
2023
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3. Evolution Pathway from Iron Compounds to Fe1(II)–N4 Sites through Gas-Phase Iron during Pyrolysis

Author

Li, Jingkun, primary, Jiao, Li, additional, Wegener, Evan, additional, Richard, Lynne Larochelle, additional, Liu, Ershuai, additional, Zitolo, Andrea, additional, Sougrati, Moulay Tahar, additional, Mukerjee, Sanjeev, additional, Zhao, Zipeng, additional, Huang, Yu, additional, Yang, Fan, additional, Zhong, Sichen, additional, Xu, Hui, additional, Kropf, A. Jeremy, additional, Jaouen, Frédéric, additional, Myers, Deborah J., additional, and Jia, Qingying, additional

Published
2019
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4. Evolution Pathway from Iron Compounds to Fe1(II)–N4Sites through Gas-Phase Iron during Pyrolysis

Author

Li, Jingkun, Jiao, Li, Wegener, Evan, Richard, Lynne Larochelle, Liu, Ershuai, Zitolo, Andrea, Sougrati, Moulay Tahar, Mukerjee, Sanjeev, Zhao, Zipeng, Huang, Yu, Yang, Fan, Zhong, Sichen, Xu, Hui, Kropf, A. Jeremy, Jaouen, Frédéric, Myers, Deborah J., and Jia, Qingying

Abstract

Pyrolysis is indispensable for synthesizing highly active Fe–N–C catalysts for the oxygen reduction reaction (ORR) in acid, but how Fe, N, and C precursors transform to ORR-active sites during pyrolysis remains unclear. This knowledge gap obscures the connections between the input precursors and the output products, clouding the pathway toward Fe–N–C catalyst improvement. Herein, we unravel the evolution pathway of precursors to ORR-active catalyst comprised exclusively of single-atom Fe1(II)–N4sites via in-temperature X-ray absorption spectroscopy. The Fe precursor transforms to Fe oxides below 300 °C and then to tetrahedral Fe1(II)–O4via a crystal-to-melt-like transformation below 600 °C. The Fe1(II)–O4releases a single Fe atom that diffuses into the N-doped carbon defect forming Fe1(II)–N4above 600 °C. This vapor-phase single Fe atom transport mechanism is verified by synthesizing Fe1(II)–N4sites via “noncontact pyrolysis” wherein the Fe precursor is not in physical contact with the N and C precursors during pyrolysis.

Published
2020
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5. Understanding the Roles of Anionic Redox and Oxygen Release during Electrochemical Cycling of Lithium-Rich Layered Li4FeSbO6

Author

McCalla, Eric, primary, Sougrati, Moulay Tahar, additional, Rousse, Gwenaelle, additional, Berg, Erik Jamstorp, additional, Abakumov, Artem, additional, Recham, Nadir, additional, Ramesha, Kannadka, additional, Sathiya, Mariyappan, additional, Dominko, Robert, additional, Van Tendeloo, Gustaaf, additional, Novák, Petr, additional, and Tarascon, Jean-Marie, additional

Published
2015
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8. Evolution Pathway from Iron Compounds to Fe 1 (II)-N 4 Sites through Gas-Phase Iron during Pyrolysis.

Author

Li J, Jiao L, Wegener E, Richard LL, Liu E, Zitolo A, Sougrati MT, Mukerjee S, Zhao Z, Huang Y, Yang F, Zhong S, Xu H, Kropf AJ, Jaouen F, Myers DJ, and Jia Q

Abstract

Pyrolysis is indispensable for synthesizing highly active Fe-N-C catalysts for the oxygen reduction reaction (ORR) in acid, but how Fe, N, and C precursors transform to ORR-active sites during pyrolysis remains unclear. This knowledge gap obscures the connections between the input precursors and the output products, clouding the pathway toward Fe-N-C catalyst improvement. Herein, we unravel the evolution pathway of precursors to ORR-active catalyst comprised exclusively of single-atom Fe 1 (II)-N 4 sites via in-temperature X-ray absorption spectroscopy. The Fe precursor transforms to Fe oxides below 300 °C and then to tetrahedral Fe 1 (II)-O 4 via a crystal-to-melt-like transformation below 600 °C. The Fe 1 (II)-O 4 releases a single Fe atom that diffuses into the N-doped carbon defect forming Fe 1 (II)-N 4 above 600 °C. This vapor-phase single Fe atom transport mechanism is verified by synthesizing Fe 1 (II)-N 4 sites via "noncontact pyrolysis" wherein the Fe precursor is not in physical contact with the N and C precursors during pyrolysis.

Published
2020
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