@article{Wang2025, 
author = {Fei Wang and Ya Gao and Zhenqiang Jiang and Feng Tian and Zhongya Pang and Xing Yu and Guangshi Li and Hsien-Yi Hsu and Shen Hu and Li Ji and Xionggang Lu and Xingli Zou},
title = {Bridging-induced densified MXene films with ultralow single-atom Pt loading for highly efficient hydrogen evolution},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {8},
pages = {94907671},
keywords = {hydrogen evolution reaction, mass activity, Ti3−xC2Ty MXene films, single-atom platinum},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907671},
doi = {10.26599/NR.2025.94907671},
abstract = {Platinum (Pt)-based materials have garnered significant attention due to their exceptional electrocatalytic performance and potential for advancing water splitting technology. However, reducing Pt usage simultaneously maintaining its high catalytic performance remains a critical challenge. Here, ultralow content (0.25 wt.‰) of Pt single atoms (SAs) was successfully anchored onto Ti3−xC2Ty MXene nanosheets, followed by the preparation of self-supported, densified MXene film electrocatalysts through a sequential bridging process involving hydrogen and covalent bonding (denoted as 0.25-HCM@PtSA). The resulting 0.25-HCM@PtSA film catalyst exhibits excellent hydrogen evolution reaction (HER) performance, showcasing a small overpotential of 48 mV at 10 mA·cm−2, an ultrahigh mass activity of 28.93 A·mgPt−1, and a large turnover frequency of 23.45 s−1 at an overpotential of 100 mV. Furthermore, density functional theory calculations reveal that the anchoring Pt SAs on the densified MXene film reduce the binding energy and hybridization strength between H atoms and the support, contributing to rapid hydrogen adsorption–desorption kinetics and high HER activity. This work provides a promising and scalable strategy for designing two-dimensional (2D) materials-based noble metal electrocatalysts with ultralow metal loading and high catalytic activity.}
}