Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction

Qi, Zhen; Biener, Juergen; Biener, Monika

doi:10.1021/acsaem.9b00355

Title: Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO₂-to-CO Reduction

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Abstract

Electrochemical CO₂ reduction (ECR) has become a viable option as the cost of renewable energy continues to decrease. One of the major obstacles that prevents its widespread use is the lack of efficient ECR catalysts due to our only slowly emerging understanding of catalyst design. Here, we report on a surface oxide-derived nanoporous gold catalyst prepared by one-step electrochemical dealloying that shows an extremely low overpotential (Faradaic efficiency for CO exceeds 90%) of 0.185 V (–0.3 V vs RHE) for CO₂-to-CO conversion in 0.1 M KHCO₃ solution. Here, we demonstrate that surface oxide-derived nanoporous gold shows improved ECR performance with higher Faradaic efficiency compared to clean nanoporous gold which is the consequence of its smaller overpotential for CO₂-to-CO reduction and simultaneous suppression of hydrogen evolution.

Authors:

Qi, Zhen ^[1]; Biener, Juergen ^[1];

^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division, Physical and Life Sciences Directorate

Publication Date:: Mon Aug 26 00:00:00 EDT 2019

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1575859

Report Number(s):: LLNL-JRNL-767518
Journal ID: ISSN 2574-0962; 957442

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: ACS Applied Energy Materials

Additional Journal Information:: Journal Volume: 2; Journal Issue: 11; Journal ID: ISSN 2574-0962

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrochemical CO2 reduction; nanoporous; dealloying; gold; electrocatalysis

Citation Formats


                    Qi, Zhen, Biener, Juergen, and Biener, Monika. Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction.  United States: N. p., 2019. 
Web.  doi:10.1021/acsaem.9b00355.

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                    Qi, Zhen, Biener, Juergen, & Biener, Monika. Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction.  United States.  https://doi.org/10.1021/acsaem.9b00355

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                    Qi, Zhen, Biener, Juergen, and Biener, Monika. Mon .  
"Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction".  United States.  https://doi.org/10.1021/acsaem.9b00355.  https://www.osti.gov/servlets/purl/1575859.

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@article{osti_1575859,

  title        = {Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction},

  author       = {Qi, Zhen and Biener, Juergen and Biener, Monika},

  abstractNote = {Electrochemical CO2 reduction (ECR) has become a viable option as the cost of renewable energy continues to decrease. One of the major obstacles that prevents its widespread use is the lack of efficient ECR catalysts due to our only slowly emerging understanding of catalyst design. Here, we report on a surface oxide-derived nanoporous gold catalyst prepared by one-step electrochemical dealloying that shows an extremely low overpotential (Faradaic efficiency for CO exceeds 90%) of 0.185 V (–0.3 V vs RHE) for CO2-to-CO conversion in 0.1 M KHCO3 solution. Here, we demonstrate that surface oxide-derived nanoporous gold shows improved ECR performance with higher Faradaic efficiency compared to clean nanoporous gold which is the consequence of its smaller overpotential for CO2-to-CO reduction and simultaneous suppression of hydrogen evolution.},

  doi          = {10.1021/acsaem.9b00355},

  journal      = {ACS Applied Energy Materials},

  number       = 11,

  volume       = 2,

  place        = {United States},

  year         = {Mon Aug 26 00:00:00 EDT 2019},

  month        = {Mon Aug 26 00:00:00 EDT 2019}

}

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Title: Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO2-to-CO Reduction

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Title: Surface Oxide-Derived Nanoporous Gold Catalysts for Electrochemical CO₂-to-CO Reduction