Iron-Locked Hydr(oxy)oxide Catalysts via Ion-Compensatory Reconstruction Boost Large-Current-Density Water Oxidation.

ABSTRACT: Nickel-iron based hydr(oxy)oxides have been well recognized as one of the best oxygen-evolving catalysts in alkaline water electrolysis. A crucial problem, however, is that iron leakage during prolonged operation would lead to the oxygen evolution reaction (OER) deactivation over time, especially under large current densities. Here, the NiFe-based Prussian blue analogue (PBA) is designed as a structure-flexible precursor for navigating an electrochemical self-reconstruction (ECSR) with Fe cation compensation to fabricate a highly active hydr(oxy)oxide (NiFeO_x H_y ) catalyst stabilized with NiFe synergic active sites. The generated NiFeO_x H_y catalyst exhibits the low overpotentials of 302 and 313 mV required to afford large current densities of 50

SUBMITTER: Liu J 

PROVIDER: S-EPMC10238203 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature