Chen Wei, Qian Guangfu, Xu Qinglian, Yu Chen, Yu Mengya, Xia Yijiang, Yin Shibin
College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Physical Science and Technology, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China.
Nanoscale. 2020 Apr 3;12(13):7116-7123. doi: 10.1039/d0nr00446d.
Efficient and inexpensive bifunctional catalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are essential for water splitting. Herein, we successfully prepare porous Fe-Mo oxide hybrid nanorods through a hydrothermal method followed by annealing at high temperature. They exhibit excellent catalytic activity for OER and HER in alkaline media, and produce a current density of 10 mA cm-2 at overpotentials of 200 and 66 mV. Besides, they work as bifunctional electrode materials for overall water splitting, achieving a current density of 10 mA cm-2 at a voltage of 1.52 V, and maintaining a current density of 60 mA cm-2 for 60 h. The unique morphology with self-supported structure can expose more active sites and facilitate charge transfer, and is not easy to peel off, thus it improves the catalytic activity and stability. This work therefore provides a valuable route for designing and fabricating inexpensive and high-performance catalytic materials for overall water splitting.
用于析氧反应（OER）和析氢反应（HER）的高效且廉价的双功能催化剂对于水分解至关重要。在此，我们通过水热法并随后在高温下退火成功制备了多孔铁-钼氧化物混合纳米棒。它们在碱性介质中对OER和HER表现出优异的催化活性，在过电位为200和66 mV时产生10 mA cm-2的电流密度。此外，它们作为用于全水分解的双功能电极材料，在1.52 V的电压下实现了10 mA cm-2的电流密度，并在60 mA cm-2的电流密度下保持60小时。具有自支撑结构的独特形态可以暴露出更多的活性位点并促进电荷转移，并且不易剥离，从而提高了催化活性和稳定性。因此，这项工作为设计和制造用于全水分解的廉价且高性能催化材料提供了一条有价值的途径。
