@article{Pan2025, 
author = {Sanjiang Pan and Shenao Wang and Zishuo Xie and Hang Li and Yang Fu and Desong Wang},
title = {Se-doped MnO2 as a low-cost and high-efficiency catalyst for acidic oxygen evolution reaction},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {12},
pages = {94907912},
keywords = {non-noble metal, hydrogen production, proton exchange membrane, acid oxygen evolution reaction, manganese-based catalysts},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907912},
doi = {10.26599/NR.2025.94907912},
abstract = {Developing acid-stable manganese-based catalysts for the oxygen evolution reaction (OER) is pivotal for advancing proton exchange membrane water electrolysis (PEMWE). Here, we present a selenium-doped MnO2 catalyst, where the synergistic effects of Se and oxygen defects stabilize Mn3+ species and regulate *OH adsorption dynamics. In situ spectroscopic studies and density functional theory (DFT) calculations confirm that Se doping modulates the electronic structure of Mn centers, lowering the energy barrier for *OH deprotonation and accelerating OER kinetics. In 0.5 M H2SO4, Se-MnO2 achieves current densities of 10 and 100 mA·cm−2 with overpotentials of 345 ± 5 and 398 ± 5 mV, respectively, outperforming commercial RuO2. Integrated into PEM electrolyzers, the catalyst demonstrates exceptional stability over 400 h under dynamic current densities (100–500 mA·cm−2), showcasing structural integrity and negligible activity decay. The strategic doping of selenium significantly enhances catalytic performance, thereby offering a promising pathway toward the development of cost-effective electrocatalysts for applications under acidic conditions.}
}