MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Surface-Modified Ni–P/Fe Alloys through Annealing for Electrocatalytic Water Splitting in Alkaline Solution
Byeongchan ChoiYangdo KimHyoung Chan Kim
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JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: MT-MB2024008

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Abstract

The present work proposes a low-cost and scalable methodology to produce electrocatalytic layers based on nickel phosphide deposition for oxygen evolution reaction. Through controlled heat treatment, the composition of the Ni–P layer can be tailored to achieve a Ni–Fe–P composite layer, which is expected to enhance the electrochemical catalytic effect. The electrochemical performance of heat-treated electrodes is evaluated by examining the effects of heat treatment temperature and electroless deposition thickness. This study not only demonstrates an innovative approach for constructing heterogeneous interfaces for high-performance electrocatalysts but also hints at the potential extension of this strategy to modulate interfaces between other binary and ternary electrocatalysts, thus propelling the frontier of water splitting technologies.

Fig. 2 (a) LSV curves for OER activity in 1 M KOH (without iR compensation), (b) Nyquist plots at 350 mV vs. RHE, (c) Tafel plots, (d) J vs. scan rate for double-layer capacitance (Cdl) calculation, (e) chronopotentiometry stability test, and (f) multi-step chronopotentiometry curve for OER activity of Ni–P coated electrodes fabricated under different conditions. (online color) Fullsize Image
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