@article{Xu2024, 
author = {Bingyan Xu and Xuan Huang and Shangheng Liu and Zhiwei Hu and Cheng-Wei Kao and Ting-Shan Chan and Hongbo Geng and Ying Zhang and Xiaoqing Huang},
title = {Antimony oxides-protected ultrathin Ir-Sb nanowires as bifunctional hydrogen electrocatalysts},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {3},
pages = {1042-1049},
keywords = {Ir nanowire, amorphous antimony oxides, bifunctional mechanism, hydrogen evolution reaction, hydrogen oxidation reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-023-5996-0},
doi = {10.1007/s12274-023-5996-0},
abstract = {Developing electrocatalysts with fast kinetics and long-term stability for alkaline hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is of considerable importance for the industrial production of green and sustainable energy. Here, an ultrathin Ir-Sb nanowires ( Ir-Sb NWs) protected by antimony oxides (SbOx) was synthesized as an efficient bifunctional catalyst for both HOR and HER under alkaline media. Except from the much higher mass activities of Ir-Sb nanowires than those of Ir nanowires (Ir NWs) and commercial Pt/C, the SbOx protective layer also contributes to the maintenance of morphology and anti-CO poisoning ability, leading to the long-term cycling performance in the presence of CO. Specifically, the Ir-Sb NW/SbOx exhibits the highest catalytic activities, which are about 3.5 and 4.8 times to those of Ir NW/C and commercial Pt/C toward HOR, respectively. This work provides that the ultrathin morphology and H2O-occupied Sb sites can exert the intrinsic high activity of Ir and effectively optimize the absorption of OH* both in alkaline HER/HOR electrolysis.}
}