Year: 2025
Type: article
Abstract: Seawater electrolysis, powered by renewable energy, presents a promising and sustainable approach to addressing the issues of freshwater shortage and energy crisis. However, the presence of chloride ions (Cl − ) in seawater poses significant challenges, causing severe corrosion and compromising long‐term durability. Unlike conventional strategies that involve coverage of catalysts with protective layers, a reverse design conception is proposed herein to construct a heterostructure with exposed catalyst nanoparticles to simultaneously enhance OER kinetics and reduce Cl − adsorption. The as‐designed electrocatalyst of nickel telluride nanorod arrays decorated with ferronickel phosphide nanoparticles (NiTe/Ni 2 FeP) achieves ultralow overpotential of 232 mV to deliver a current density of 500 mA cm −2 in 1 m KOH & seawater. Furthermore, the electrocatalyst demonstrates high durability, maintaining stable performance for over 6800 h at current densities ranging from 100 to 1000 mA cm −2 under the same condition. Comprehensive characterizations and theoretical calculations reveal that the abundant interfaces between NiTe and Ni 2 FeP create a built‐in electric field effect to enable interfacial charge redistribution, which not only significantly reduces Cl − adsorption to mitigate Cl − induced corrosion, but also facilitates the structure transformation into highly active γ─Ni(Fe)OOH species for enhanced overall activity.
Source: Advanced Functional Materials
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Pearl River Talents Program, Guangzhou Municipal Science and Technology Project, Fundamental Research Funds for the Central Universities
OpenAlex ID: W4416725292