In this paper, monolithic nanoporous Ni-Fe electrocatalyst is developed by dealloying a Ni-Fe-Al alloy, fabricated by a laser-based manufacturing method, as the electrocatalyst toward oxygen evolution reaction (OER). The nanoporous Ni-Fe alloy displays an improved electrochemical performance by exhibiting an OER current density of 100 mA/cm(2) at 442 mV overpotential in the 1 M KOH aqueous solution, which is better than that of laser processed bulk Ni-Fe alloy (464 mV). The structures, crystallinities, and chemical compositions of the nanoporous Ni-Fe electrocatalyst are characterized by SEM, XRD and EDXS. With an activity comparable to the electrocatalysts reported to date, the monolithic nanoporous Ni-Fe electrodes are also highly flexible in mechanical configurations, due to the combined advantages of both laser and dealloying processes, which provide new options for OER electrode design. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.