NiFe_xP@NiCo-LDH nanoarray bifunctional electrocatalysts for coupling of methanol oxidation and hydrogen production

摘要

NiFe.P@NiCo-LDH/CC nanosheet core-shell nanoarrays electrocatalysts are prepared by electrodeposition and phosphating methods for relatively low potential production of H2 and value-added formate in methanol/water electrolysis systems. During the oxygen evolution reaction process, the over potential is 269 mA at the current density of 50 mA cm-2 and the Tafel slope is 97 mV dec-1. It also realizes the stable long-term electrocatalysis of methanol to formate under high current density and maintains a relatively high Faraday efficiency of 100. Meanwhile, the energy saving is higher than 10 in the methanol oxidation and co-hydrogen production system that achieves great attention. The superior performance of NiFe.P@NiCo-LDH/CC bifunctional electrocatalysts might be beneficial from the interaction to Ni and Fe bimetallic extranuclear electrons that exposes more active sites. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.