English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Realizing High and Stable Electrocatalytic Oxygen Evolution for Iron-Based Perovskites by Co-Doping-Induced Structural and Electronic Modulation

MPS-Authors
/persons/resource/persons126666

Hu,  Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

She, S., Zhu, Y., Wu, X., Hu, Z., Shelke, A., Pong, W.-F., et al. (2022). Realizing High and Stable Electrocatalytic Oxygen Evolution for Iron-Based Perovskites by Co-Doping-Induced Structural and Electronic Modulation. Advanced Functional Materials, 32(15): 2111091, pp. 1-10. doi:10.1002/adfm.202111091.


Cite as: https://hdl.handle.net/21.11116/0000-000A-799F-C
Abstract
Oxygen evolution reaction (OER) is a vital electrochemical process for various energy conversion and fuel production technologies. Co/Ni-rich perovskite oxides are extensively studied as promising alternatives to precious-metal catalysts; however, low-cost and earth-abundant iron (Fe)-rich perovskites are rarely investigated to date due to their poor activity and durability. This study reports an Fe-rich Sr0.95Ce0.05Fe0.9Ni0.1O3−δ (SCFN) perovskite oxide with minor Ce/Ni co-doping in A/B sites as a high-performance OER electrocatalyst. Impressively, SCFN shows more than an order of magnitude enhancement in mass-specific activity compared to the SrFeO3−δ (SF) parent oxide, and delivers an attractive small overpotential of 340 mV at 10 mA cm−2, outperforming many Co/Ni-rich perovskite oxides ever reported. Additionally, SCFN displays robust operational durability with negligible activity loss under alkaline OER conditions. The increased activity and stability of SCFN can be ascribed to co-doping-induced synergistic promotion between structural and electronic modulation, where Ce doping facilitates the formation of a 3D corner-sharing cubic structure and Ni doping gives rise to strong electronic interactions between active sites, which is key to achieving a highly active long-life catalyst. Importantly, this strategy is universal and can be extended to other Fe-based parent perovskite oxides with high structural diversity. © 2021 Wiley-VCH GmbH