An Unconventional Iron Nickel Catalyst for the Oxygen Evolution Reaction

The oxygen evolution reaction (OER) is a key process that enables the storage of renewable energies in the form of chemical fuels. Here, we describe a catalyst that exhibits turnover frequencies higher than state-of-the-art catalysts that operate in alkaline solutions, including the benchmark nickel iron oxide. This new catalyst is easily prepared from readily available and industrially relevant nickel foam, and it is stable for many hours. Operando X-ray absorption spectroscopic data reveal that the catalyst is made of nanoclusters of gamma-FeOOH covalently linked to gamma-NiOOH support. According to density functional theory (DFT) computations, this structure may allow a reaction path involving iron as the oxygen evolving center and a nearby terrace O site on the gamma-NiOOH support oxide as a hydrogen acceptor.


Published in:
Acs Central Science, 5, 3, 558-568
Year:
Mar 27 2019
ISSN:
2374-7943
2374-7951
Keywords:
Laboratories:




 Record created 2019-06-18, last modified 2019-08-19

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)