NiFe Catalysts for Oxygen Evolution Reaction: Is There an Optimal Thickness for Generating a Dynamically Stable Active Interface?
Year: 2024
Authors: Ciambriello L., Alessandri I., Gavioli L., Vassalini I.
Autors Affiliation: Univ Cattolica Sacro Cuore, Interdisciplinary Labs Adv Mat Phys i LAMP, Via Garzetta 46, I-25133 Brescia, Italy; Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, Via Garzetta 46, I-25133 Brescia, Italy; UdR Brescia, INSTM, Brescia, Italy; Univ Brescia, Dept Informat Engn DII, Via Branze 38, I-25123 Brescia, Italy; INO CNR, Via Branze 38, I-2513 Brescia, Italy.
Abstract: Here we investigated the dynamics of OER activity of NiFe (90/10) catalysts over 1000 potential sweep cycles as a function of their mass loading. Over twenty different films with mass loading in the 10 ng/cm2-30 mu g/cm2 range were deposited by Supersonic Cluster Beam Deposition (SCBD), allowing to study the progress of OER in sub-monolayer, monolayer and multilayer regimes. Upon prolonged potential sweeps the electrocatalytic performances of multilayers decreased, while those of monolayers were significantly improved. The best balance in terms of catalytic efficiency and stability in working conditions is found for mass loadings corresponding to a NiFe monolayer, corresponding to a mass loading around 1 mu g/cm2 and a thickness of about 3 nm. The Oxygen Evolution Activity of NiFe films with different thickness was monitored over 1000 potential sweep cycles, revealing the optimal mass loading needed to maintain catalytic activity while avoiding excessive material consumption. image
Journal/Review: CHEMCATCHEM
More Information: This research was partially supported by Fondazione Cariplo (TESLA Project)KeyWords: Electrocatalysts; EnergyDOI: 10.1002/cctc.202400286Citations: 2data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here