Comparative study of NiFe-LDH nanosheet anodes on stainless steel, nickel, and carbon porous transport layers for anion exchange membrane water electrolysis
Journal
International Journal of Hydrogen Energy
Journal Volume
199
Start Page
152862
ISSN
03603199
Date Issued
2026-01-09
Author(s)
Abstract
Nickel-iron layered double hydroxides (NiFe-LDHs) are promising oxygen evolution reaction (OER) catalysts for anion exchange membrane water electrolysis (AEMWE). We compare catalytic performance of NiFe-LDH hydrothermally grown on stainless steel fiber paper (SSP), nickel fiber paper (NFP), and carbon paper (CP) porous transport layers (PTLs). The experimental results indicate that NiFe-LDH catalytic performance depends strongly on PTLs. Scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction analyses confirm uniform growth and substrate-dependent surface reconstruction. Electrochemical tests show that NiFe-LDH/SSP exhibits the best OER activity with an overpotential of 289 mV at 50 mA cm−2, and a Tafel slope of 29 mV dec−1. AEMWE test demonstrates current density of 1304 mA cm−2 operated at 2.0 V and 70 °C. 9 % degradation occurs after 5000-cycle accelerated stress test. Despite partial FeOOH formation, the NiFe-LDH/SSP retains its nanosheet framework and conductivity. These results highlight the critical role of PTLs in determining catalytic performance.
Subjects
Anion exchange membrane water electrolysis
NiFe-LDH
Oxygen evolution reaction
Porous transport layer
Publisher
Elsevier Ltd
Type
journal article