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Title: Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction

Abstract

Operando nuclear resonant inelastic X-ray scattering (NRIXS) and X-ray absorption fine-structure spectroscopy (XAFS) measurements were used to gain insight into the structure and surface composition of FeCu and FeAg nanoparticles (NPs) during the electrochemical CO2 reduction (CO2RR) and to extract correlations with their catalytic activity and selectivity. The formation of a core–shell structure during CO2RR for FeAg NPs was inferred from the analysis of the operando NRIXS data (phonon density of states, PDOS) and XAFS measurements. Electrochemical analysis of the FeAg NPs revealed a faradaic selectivity of 36 % for CO in 0.1 M KHCO3 at -1.1 V vs. RHE, similar to that of pure Ag NPs. In contrast, a predominant selectivity towards H2 evolution is obtained in the case of the FeCu NPs, analogous to the results obtained for pure Fe NPs, although small Cu NPs have also been shown to favor H2 production.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [3];  [4];  [4];  [4]; ORCiD logo [3]; ORCiD logo [3]
  1. Ruhr Univ., Bochum (Germany); Fritz-Haber Institute of the Max Planck Society, Berlin (Germany)
  2. Ruhr Univ., Bochum (Germany)
  3. Fritz-Haber Institute of the Max Planck Society, Berlin (Germany)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
European Research Council (ERC); German Research Foundation (DFG); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1785375
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 59; Journal Issue: 50; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CO(2)electroreduction; NRIXS; XAFS; nanoparticles; operando measurements

Citation Formats

Kunze, Sebastian, Grosse, Philipp, Bernal Lopez, Miguel, Sinev, Ilya, Zegkinoglou, Ioannis, Mistry, Hemma, Timoshenko, Janis, Hu, Michael Y., Zhao, Jiyong, Alp, Ercan E., Chee, See Wee, and Roldan Cuenya, Beatriz. Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction. United States: N. p., 2020. Web. doi:10.1002/anie.202010535.
Kunze, Sebastian, Grosse, Philipp, Bernal Lopez, Miguel, Sinev, Ilya, Zegkinoglou, Ioannis, Mistry, Hemma, Timoshenko, Janis, Hu, Michael Y., Zhao, Jiyong, Alp, Ercan E., Chee, See Wee, & Roldan Cuenya, Beatriz. Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction. United States. https://doi.org/10.1002/anie.202010535
Kunze, Sebastian, Grosse, Philipp, Bernal Lopez, Miguel, Sinev, Ilya, Zegkinoglou, Ioannis, Mistry, Hemma, Timoshenko, Janis, Hu, Michael Y., Zhao, Jiyong, Alp, Ercan E., Chee, See Wee, and Roldan Cuenya, Beatriz. Tue . "Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction". United States. https://doi.org/10.1002/anie.202010535. https://www.osti.gov/servlets/purl/1785375.
@article{osti_1785375,
title = {Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction},
author = {Kunze, Sebastian and Grosse, Philipp and Bernal Lopez, Miguel and Sinev, Ilya and Zegkinoglou, Ioannis and Mistry, Hemma and Timoshenko, Janis and Hu, Michael Y. and Zhao, Jiyong and Alp, Ercan E. and Chee, See Wee and Roldan Cuenya, Beatriz},
abstractNote = {Operando nuclear resonant inelastic X-ray scattering (NRIXS) and X-ray absorption fine-structure spectroscopy (XAFS) measurements were used to gain insight into the structure and surface composition of FeCu and FeAg nanoparticles (NPs) during the electrochemical CO2 reduction (CO2RR) and to extract correlations with their catalytic activity and selectivity. The formation of a core–shell structure during CO2RR for FeAg NPs was inferred from the analysis of the operando NRIXS data (phonon density of states, PDOS) and XAFS measurements. Electrochemical analysis of the FeAg NPs revealed a faradaic selectivity of 36 % for CO in 0.1 M KHCO3 at -1.1 V vs. RHE, similar to that of pure Ag NPs. In contrast, a predominant selectivity towards H2 evolution is obtained in the case of the FeCu NPs, analogous to the results obtained for pure Fe NPs, although small Cu NPs have also been shown to favor H2 production.},
doi = {10.1002/anie.202010535},
journal = {Angewandte Chemie (International Edition)},
number = 50,
volume = 59,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2020},
month = {Tue Oct 06 00:00:00 EDT 2020}
}

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