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Title: Covalent Organic Framework (COF) Derived Ni–N–C Catalysts for Electrochemical CO 2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites

Abstract

Electrochemical CO2 reduction is a potential approach to convert CO2 into valuable chemicals using electricity as feedstock. Abundant and affordable catalyst materials are needed to upscale this process in a sustainable manner. Nickel-nitrogen-doped carbon (Ni-N-C) is an efficient catalyst for CO2 reduction to CO, and the single-site Ni-Nx motif is believed to be the active site. However, critical metrics for its catalytic activity, such as active site density and intrinsic turnover frequency, so far lack systematic discussion. In this work, we prepared a set of covalent organic framework (COF)-derived Ni-N-C catalysts, for which the Ni-Nx content could be adjusted by the pyrolysis temperature. The combination of high-angle annular dark-field scanning transmission electron microscopy and extended X-ray absorption fine structure evidenced the presence of Ni single-sites, and quantitative X-ray photoemission addressed the relation between active site density and turnover frequency.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [1];  [4];  [1];  [1];  [1];  [1];  [3];  [3]; ORCiD logo [2];  [3]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]
  1. Technical Univ. of Berlin (Germany)
  2. Technical Univ. of Denmark, Lyngby (Denmark)
  3. Fritz-Haber Institute of Max-Planck Society, Berlin (Germany)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); European Union (EU); German Research Foundation (DFG)
OSTI Identifier:
1867772
Grant/Contract Number:  
AC05-00OR22725; 851441; 390540038
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 61; Journal Issue: 15; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; active site density; CO2 reduction; covalent organic framework; single-site Ni-N-C; turnover frequency

Citation Formats

Li, Changxia, Ju, Wen, Vijay, Sudarshan, Timoshenko, Janis, Mou, Kaiwen, Cullen, David A., Yang, Jin, Wang, Xingli, Pachfule, Pradip, Brückner, Sven, Jeon, Hyo Sang, Haase, Felix T., Tsang, Sze‐Chun, Rettenmaier, Clara, Chan, Karen, Cuenya, Beatriz Roldan, Thomas, Arne, and Strasser, Peter. Covalent Organic Framework (COF) Derived Ni–N–C Catalysts for Electrochemical CO 2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites. United States: N. p., 2022. Web. doi:10.1002/anie.202114707.
Li, Changxia, Ju, Wen, Vijay, Sudarshan, Timoshenko, Janis, Mou, Kaiwen, Cullen, David A., Yang, Jin, Wang, Xingli, Pachfule, Pradip, Brückner, Sven, Jeon, Hyo Sang, Haase, Felix T., Tsang, Sze‐Chun, Rettenmaier, Clara, Chan, Karen, Cuenya, Beatriz Roldan, Thomas, Arne, & Strasser, Peter. Covalent Organic Framework (COF) Derived Ni–N–C Catalysts for Electrochemical CO 2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites. United States. https://doi.org/10.1002/anie.202114707
Li, Changxia, Ju, Wen, Vijay, Sudarshan, Timoshenko, Janis, Mou, Kaiwen, Cullen, David A., Yang, Jin, Wang, Xingli, Pachfule, Pradip, Brückner, Sven, Jeon, Hyo Sang, Haase, Felix T., Tsang, Sze‐Chun, Rettenmaier, Clara, Chan, Karen, Cuenya, Beatriz Roldan, Thomas, Arne, and Strasser, Peter. Mon . "Covalent Organic Framework (COF) Derived Ni–N–C Catalysts for Electrochemical CO 2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites". United States. https://doi.org/10.1002/anie.202114707. https://www.osti.gov/servlets/purl/1867772.
@article{osti_1867772,
title = {Covalent Organic Framework (COF) Derived Ni–N–C Catalysts for Electrochemical CO 2 Reduction: Unraveling Fundamental Kinetic and Structural Parameters of the Active Sites},
author = {Li, Changxia and Ju, Wen and Vijay, Sudarshan and Timoshenko, Janis and Mou, Kaiwen and Cullen, David A. and Yang, Jin and Wang, Xingli and Pachfule, Pradip and Brückner, Sven and Jeon, Hyo Sang and Haase, Felix T. and Tsang, Sze‐Chun and Rettenmaier, Clara and Chan, Karen and Cuenya, Beatriz Roldan and Thomas, Arne and Strasser, Peter},
abstractNote = {Electrochemical CO2 reduction is a potential approach to convert CO2 into valuable chemicals using electricity as feedstock. Abundant and affordable catalyst materials are needed to upscale this process in a sustainable manner. Nickel-nitrogen-doped carbon (Ni-N-C) is an efficient catalyst for CO2 reduction to CO, and the single-site Ni-Nx motif is believed to be the active site. However, critical metrics for its catalytic activity, such as active site density and intrinsic turnover frequency, so far lack systematic discussion. In this work, we prepared a set of covalent organic framework (COF)-derived Ni-N-C catalysts, for which the Ni-Nx content could be adjusted by the pyrolysis temperature. The combination of high-angle annular dark-field scanning transmission electron microscopy and extended X-ray absorption fine structure evidenced the presence of Ni single-sites, and quantitative X-ray photoemission addressed the relation between active site density and turnover frequency.},
doi = {10.1002/anie.202114707},
journal = {Angewandte Chemie (International Edition)},
number = 15,
volume = 61,
place = {United States},
year = {Mon Jan 31 00:00:00 EST 2022},
month = {Mon Jan 31 00:00:00 EST 2022}
}

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