Time-resolved spectroscopy uncovers deprotonation-induced reconstruction in oxygen-evolution NiFe-based (oxy)hydroxides
University of Science and Technology of China · National Synchrotron Radiation Laboratory · +1 more institution
Abstract
Transition-metal layered double hydroxides are widely utilized as electrocatalysts for the oxygen evolution reaction (OER), undergoing dynamic transformation into active oxyhydroxides during electrochemical operation. Nonetheless, our understanding of the non-equilibrium structural changes that occur during this process remains limited. In this study, utilizing in situ energy-dispersive X-ray absorption spectroscopy and machine learning analysis, we reveal the occurrence of deprotonation and elucidate the role of incorporated iron in facilitating the transition from nickel-iron layered double hydroxide (NiFe LDH) into its active oxyhydroxide. Our findings demonstrate that iron substitution promotes…
Citation impact
- FWCI
- 31.57
- Percentile
- 100%
- References
- 43
Authors
11- DWDan WuCorresponding
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- LHLongfei Hu
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- XLXiaokang Liu
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- TLTong Liu
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- XZXiangyu Zhu
University of Science and Technology of China, Anhui University
Topics & keywords
- Deprotonation
- Spectroscopy
- Oxygen evolution
- Oxygen
- Materials science
- Chemistry
- Physics
- Physical chemistry