Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron

Latyshev, Vitalii; You, Hoydoo; Kovalcikova, Alexandra; Komanicky, Vladimir

doi:10.1016/j.electacta.2019.135178

Title: Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron

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Abstract

The methanol electrooxidation catalysts in the form of Rh and FeRh thin films were prepared by magnetron sputtering deposition. To activate the FeRh catalyst, the as-prepared FeRh films were cycled in 0.1 M HClO₄ electrolyte in potential window from -0.25 V to 0.8 V (vs. Ag/AgCl). The dissolution of Fe atoms during the cycling leads to the formation of Rh-skeleton surface. Obtained FeRh catalysts exhibit significantly enhanced activity to methanol electrooxidation in both acidic and alkaline environments comparing to pure Rh catalyst. The optimal concentration of Fe is found to be 50%. Electrochemical impedance spectroscopy investigations show the higher rate of methanol dehydrogenation as well as better tolerance to CO intermediates poisoning of the FeRh catalysts. Furthermore, this study demonstrates that Rh-based catalysts can be considered as alternative to Pt-based catalysts.

Authors:

Latyshev, Vitalii ^[1]; You, Hoydoo ^[2]; Kovalcikova, Alexandra ^[3]; Komanicky, Vladimir ^[1]

P. J. Safarik Univ., Kosice (Slovak Republic)
Argonne National Lab. (ANL), Lemont, IL (United States)
Slovak Academy of Sciences, Kosice (Slovak Republic)

Publication Date:: 2019-11-01

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1577113

Alternate Identifier(s):: OSTI ID: 1573839

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Electrochimica Acta

Additional Journal Information:: Journal Volume: 330; Journal Issue: C; Journal ID: ISSN 0013-4686

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Fe-Rh Catalyst; Methanol oxidation reaction; Rhodium

Citation Formats


                    Latyshev, Vitalii, You, Hoydoo, Kovalcikova, Alexandra, and Komanicky, Vladimir. Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron.  United States: N. p., 2019. 
Web.  doi:10.1016/j.electacta.2019.135178.

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                    Latyshev, Vitalii, You, Hoydoo, Kovalcikova, Alexandra, & Komanicky, Vladimir. Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron.  United States.  https://doi.org/10.1016/j.electacta.2019.135178

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                    Latyshev, Vitalii, You, Hoydoo, Kovalcikova, Alexandra, and Komanicky, Vladimir. Fri .  
"Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron".  United States.  https://doi.org/10.1016/j.electacta.2019.135178.  https://www.osti.gov/servlets/purl/1577113.

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@article{osti_1577113,

  title        = {Enhancing catalytic activity of rhodium towards methanol electro-oxidation in both acidic and alkaline media by alloying with iron},

  author       = {Latyshev, Vitalii and You, Hoydoo and Kovalcikova, Alexandra and Komanicky, Vladimir},

  abstractNote = {The methanol electrooxidation catalysts in the form of Rh and FeRh thin films were prepared by magnetron sputtering deposition. To activate the FeRh catalyst, the as-prepared FeRh films were cycled in 0.1 M HClO4 electrolyte in potential window from -0.25 V to 0.8 V (vs. Ag/AgCl). The dissolution of Fe atoms during the cycling leads to the formation of Rh-skeleton surface. Obtained FeRh catalysts exhibit significantly enhanced activity to methanol electrooxidation in both acidic and alkaline environments comparing to pure Rh catalyst. The optimal concentration of Fe is found to be 50%. Electrochemical impedance spectroscopy investigations show the higher rate of methanol dehydrogenation as well as better tolerance to CO intermediates poisoning of the FeRh catalysts. Furthermore, this study demonstrates that Rh-based catalysts can be considered as alternative to Pt-based catalysts.},

  doi          = {10.1016/j.electacta.2019.135178},

  journal      = {Electrochimica Acta},

  number       = C,

  volume       = 330,

  place        = {United States},

  year         = {2019},

  month        = {11}

}

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