Effect of Iron Doping in Ordered Nickel Oxide Thin Film Catalyst for the Oxygen Evolution Reaction
Artikel i vetenskaplig tidskrift, 2024
Water splitting has emerged as a promising route for generating hydrogen as an alternative to conventional production methods. Finding affordable and scalable catalysts for the anodic half-reaction, the oxygen evolution reaction (OER), could help with its industrial widespread implementation. Iron-containing Ni-based catalysts have a competitive performance for the use in commercial alkaline electrolyzers. Due to the complexity of studying the catalysts at working conditions, the active phase and the role that iron exerts in conjunction with Ni are still a matter of investigation. Here, we study this topic with NiO(001) and Ni0.75Fe0.25Ox(001) thin film model electrocatalysts employing surface-sensitive techniques. We show that iron constrains the growth of the oxyhydroxide phase formed on top of the Ni or NiFe oxide, which is considered the active phase for the OER. Besides, operando Raman and grazing incidence X-ray absorption spectroscopy experiments reveal that the presence of iron affects both, the disorder level of the active phase and the oxidative charge around Ni during OER. The observed compositional, structural, and electronic properties of each system have been correlated with their electrochemical performance.
Fe doping
alkaline OER
NiOthin films
model catalysts
operando spectroscopy
Författare
Ane Etxebarria
Max-Planck-Gesellschaft
Universidad del Pais Vasco / Euskal Herriko Unibertsitatea
Mauricio Lopez Luna
Lawrence Berkeley Natl Lab, Adv Light Source ALS
Lawrence Berkeley National Laboratory
Max-Planck-Gesellschaft
Andrea Martini
Max-Planck-Gesellschaft
Uta Hejral
Chalmers, Fysik, Kemisk fysik
Martina Ruescher
Max-Planck-Gesellschaft
Chao Zhan
Max-Planck-Gesellschaft
Antonia Herzog
Massachusetts Institute of Technology (MIT)
Max-Planck-Gesellschaft
Afshan Jamshaid
Max-Planck-Gesellschaft
David Kordus
Max-Planck-Gesellschaft
Arno Bergmann
Max-Planck-Gesellschaft
Helmut Kuhlenbeck
Max-Planck-Gesellschaft
Beatriz Roldan Cuenya
Max-Planck-Gesellschaft
ACS CATALYSIS
2155-5435 (ISSN)
Vol. 14 18 14219-14232Ämneskategorier
Materialkemi
Den kondenserade materiens fysik
DOI
10.1021/acscatal.4c02572