@article{Li2026, 
author = {Junmin Li and Geng Wu and Yi Shi and Xiao Han and Qi Jin and Mengting Lv and Xun Hong},
title = {Ultrathin amorphous Ru0.91Ta0.09Ox nanosheets for enhanced electrochemical stability in acidic oxygen evolution reaction},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {2},
pages = {94907956},
keywords = {oxygen evolution reaction, amorphous Ru0.91Ta0.09Ox nanosheets, electronic structure modulation, electrochemical stability},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907956},
doi = {10.26599/NR.2025.94907956},
abstract = {Efficient Ru-based catalysts are crucial for reducing reliance on costly Ir in acidic oxygen evolution reaction (OER). However, Ru-based oxides suffer from severe Ru dissolution and overoxidation under acidic conditions, limiting practical application. Here, we synthesized ultrathin amorphous Ru0.91Ta0.09Ox nanosheets with a thickness of 2.2 nm. The O K-edge X-ray absorption near-edge spectroscopy (XANES) spectra reveal a positive shift in the t2g peak for A-Ru0.91Ta0.09Ox nanosheets (NSs), indicating reduced Ru–O bond covalency. Notably, A-Ru0.91Ta0.09Oₓ NSs exhibit outstanding acidic OER performance, delivering a low overpotential of 185  mV at 10 mA·cm−2. Moreover, the chronoamperometry stability test shows A-Ru0.91Ta0.09Oₓ NSs maintained a much more stable current density over 105 h compared to A-RuOx NSs and C-RuO2. The Ru 3p X-ray photoelectron spectroscopy (XPS) spectra at different potentials reveal that Ta transfers electrons to Ru, suppressing peroxidation and reducing Ru dissolution, which accounts for the enhanced stability of A-Ru0.91Ta0.09Ox NSs. Furthermore, the enhanced stability of A-Ru0.97Nb0.03Ox NSs and A-Ru0.82W0.18Ox NSs further validate the general applicability of integrating corrosion-resistant metals with amorphous RuOx nanosheets to boost acidic OER stability.}
}