Dealloying fabrication of hierarchical porous Nickel-Iron foams for efficient oxygen evolution reaction.

ABSTRACT: Designing and preparing highly active oxygen evolution reaction (OER) electrodes are essential for improving the overall efficiency of water splitting. Increasing the number of active sites is the simplest way to enhance OER performance. Herein, we present a dealloy-etched Ni-Fe foam with a hierarchical nanoporous structure as integrated electrodes with excellent performance for OER. Using the dealloying method on the Ni-Fe foam framework, a nanoporous structure is produced, which is named nanoporous Ni-Fe@Ni-Fe foam (NP-NF@NFF). Because of the peculiarities of the dealloying method, the NP-NF@NFF produced contains oxygen vacancies and heterojunctions. As a result, NP-NF@NFF electrode outperforms state-of-the-art noble metal catalysts with an extremely low overpotential of 210 and 285 mV a

SUBMITTER: Zhou T 

PROVIDER: S-EPMC9669365 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature