Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media

Mamtani, Kuldeep; Singh, Deepika; Dogu, Doruk; Jain, Deeksha; Millet, Jean-Marc M.; Ozkan, Umit S.

doi:10.1021/acs.energyfuels.8b01510

Title: Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media

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Abstract

In this work, CN_x catalysts were synthesized using Fe-doped MgO as a growth substrate. The oxygen reduction reaction (ORR) performance of the synthesized samples was evaluated in a half-cell. Acid-washing improved the ORR activity for the synthesized CN_x samples. This is attributed to the removal of the exposed metal, which is likely to be blocking the active sites. Characterization experiments suggest that acid-washing totally eliminates the support material (MgO) and renders carbon more graphitic. This is likely to be due to elimination of amorphous or less crystalline species during washing. In addition, characterization experiments reveal significant differences in the metallic species that are exposed versus those encased in the carbon nanostructure.

Authors:

Mamtani, Kuldeep ^[1]; Singh, Deepika ^[1]; Dogu, Doruk ^[1]; Jain, Deeksha ^[1]; Millet, Jean-Marc M. ^[2];

^[1]

The Ohio State Univ., Columbus, OH (United States)
Univ. Claude-Bernard, Cedex (France)

Publication Date:: 2018-09-18

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Ohio Coal Research Consortium; E.I. DuPont de Nemours & Co.; The Dow Chemical Company; Northwestern University

OSTI Identifier:: 1482241

Grant/Contract Number:: FG02-07ER15896; OCRC-C-04; AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Energy and Fuels

Additional Journal Information:: Journal Volume: 32; Journal Issue: 10; Journal ID: ISSN 0887-0624

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: ENGLISH

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Etching; Redox reactions; Iron; Catalysts; Magnetic properties

Citation Formats


                    Mamtani, Kuldeep, Singh, Deepika, Dogu, Doruk, Jain, Deeksha, Millet, Jean-Marc M., and Ozkan, Umit S.. Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media.  United States: N. p., 2018. 
Web.  doi:10.1021/acs.energyfuels.8b01510.

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                    Mamtani, Kuldeep, Singh, Deepika, Dogu, Doruk, Jain, Deeksha, Millet, Jean-Marc M., & Ozkan, Umit S.. Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media.  United States.  https://doi.org/10.1021/acs.energyfuels.8b01510

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                    Mamtani, Kuldeep, Singh, Deepika, Dogu, Doruk, Jain, Deeksha, Millet, Jean-Marc M., and Ozkan, Umit S.. Tue .  
"Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media".  United States.  https://doi.org/10.1021/acs.energyfuels.8b01510.  https://www.osti.gov/servlets/purl/1482241.

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@article{osti_1482241,

  title        = {Effect of Acid-Washing on the Nature of Bulk Characteristics of Nitrogen-Doped Carbon Nanostructures as Oxygen Reduction Reaction Electrocatalysts in Acidic Media},

  author       = {Mamtani, Kuldeep and Singh, Deepika and Dogu, Doruk and Jain, Deeksha and Millet, Jean-Marc M. and Ozkan, Umit S.},

  abstractNote = {In this work, CNx catalysts were synthesized using Fe-doped MgO as a growth substrate. The oxygen reduction reaction (ORR) performance of the synthesized samples was evaluated in a half-cell. Acid-washing improved the ORR activity for the synthesized CNx samples. This is attributed to the removal of the exposed metal, which is likely to be blocking the active sites. Characterization experiments suggest that acid-washing totally eliminates the support material (MgO) and renders carbon more graphitic. This is likely to be due to elimination of amorphous or less crystalline species during washing. In addition, characterization experiments reveal significant differences in the metallic species that are exposed versus those encased in the carbon nanostructure.},

  doi          = {10.1021/acs.energyfuels.8b01510},

  journal      = {Energy and Fuels},

  number       = 10,

  volume       = 32,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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