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Tuning Layered Double Hydroxides from Trimetallic to High-Entropy Nanomaterials for Enhanced Oxygen Evolution in Alkaline Environments

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Layered double hydroxides (LDHs) enriched with multiple metal elements and high-entropy alloys (HEAs) have gained attention as effective catalysts for the oxygen evolution reaction (OER). In this study, we report the hydrothermal synthesis of high-entropy FeCoCrMnCu (FCCMC) LDHs, aiming to develop cost-efficient and durable electrocatalysts. Extensive material characterization using FE-SEM, HR-TEM, XRD, EDX, and XPS confirmed the successful fabrication of FCCMC LDHs with uniform elemental dispersion and well-defined crystal structure. When tested under alkaline conditions, FCCMC LDHs displayed superior OER performance compared to their ternary (FeCoCr, FCC) and quaternary (FeCoCrMn, FCCM) analogs. Specifically, FCCMC achieved a notably low overpotential of 295 mV at 10 mA cm –2 and a Tafel slope of 119.5 mV dec –1, suggesting more favorable catalytic kinetics. Moreover, the FCCMC catalyst demonstrated impressive operational stability, maintaining activity over 74 h without significant performance loss. Collectively, these results identify FCCMC LDHs as a highly promising candidate for advancing efficient and stable electrocatalysts, supporting future progress in clean and sustainable energy technologies.

Source: ACS Applied Nano Materials

DOI: 10.1021/acsanm.5c03590

Authors: Chandrasekaran Pitchai, Chao-Fang Huang, Chih-Ming Chen

Institution: National Chung Hsing University

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,500