@article{Nie2026, 
author = {Siyang Nie and Qingda Liu and Liang Wu and Xun Wang},
title = {Surface entropy-engineering: Towards general synthesis of high entropy subnano-oxides},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {4},
pages = {94908030},
keywords = {high entropy oxides, subnano-oxides, photocatalysis CO2 reduction, surface entropy},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908030},
doi = {10.26599/NR.2025.94908030},
abstract = {High entropy oxides (HEOs), composed of at least five nearly equimolar principal atoms occupying a similar sublattice, demonstrate promising catalytic potential but limited activity. Low-dimensional HEOs, serving as the metastable phase, possess distinctive electronic structures and fully exposed active sites, which anticipate showcasing appealing performance; however, their synthesis remains challenging. Herein, through the incorporation of clusters for kinetic control, a library of single-phase high entropy oxides (HEOs) with single-unit-cell thickness was synthesized under mild conditions (373 K). By modulating the surface entropies, including vibrational, translational, and rotational entropy, the synthesized high entropy subnano-oxides can exhibit structures, such as subnano-wires, subnano-sheets, and spiral coils. Contributed by the fully exposed active sites and electron delocalization among two-dimensional (2D) layer, HEOs presented as subnano-sheets display enhanced catalytic activity for photocatalytic reduction of CO2 to CH4, achieving a yield (5777 ± 230.21 μmol·g−1·h−1), which is 41 times higher than that of bulk HEO obtained from the high-temperature calcination synthetic route.}
}