Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction
Journal Article
·
· Angewandte Chemie (International Edition)
- Ruhr Univ., Bochum (Germany); Fritz-Haber Institute of the Max Planck Society, Berlin (Germany)
- Ruhr Univ., Bochum (Germany)
- Fritz-Haber Institute of the Max Planck Society, Berlin (Germany)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Deutsche Forschungsgemeinschaft (DFG); European Research Council (ERC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1785375
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 50 Vol. 59; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Selective Electrocatalytic Reduction of CO2 into CO at Small, Thiol-Capped Au/Cu Nanoparticles
Large-scale synthesis of metal/nitrogen Co-doped carbon catalysts for CO2 electroreduction
Electrochemical Flow Reactor Design Allows Tunable Mass Transport Conditions for Operando Surface Enhanced Infrared Absorption Spectroscopy
Journal Article
·
Wed Aug 08 20:00:00 EDT 2018
· Journal of Physical Chemistry. C
·
OSTI ID:1477176
Large-scale synthesis of metal/nitrogen Co-doped carbon catalysts for CO2 electroreduction
Journal Article
·
Mon Apr 17 20:00:00 EDT 2023
· Electrochimica Acta
·
OSTI ID:1975354
Electrochemical Flow Reactor Design Allows Tunable Mass Transport Conditions for Operando Surface Enhanced Infrared Absorption Spectroscopy
Journal Article
·
Sun Jul 02 20:00:00 EDT 2023
· ChemCatChem
·
OSTI ID:1994586