Efficient bifunctional catalysts for overall water splitting: porous Fe–Mo oxide hybrid nanorods,Nanoscale

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Efficient bifunctional catalysts for overall water splitting: porous Fe–Mo oxide hybrid nanorods
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/05 , DOI: 10.1039/d0nr00446d
Wei Chen _{1,

2,

3,

4,

5} , Guangfu Qian _{1,

2,

3,

4,

5} , Qinglian Xu _{1,

2,

3,

4,

5} , Chen Yu _{1,

2,

3,

4,

5} , Mengya Yu _{1,

2,

3,

4,

5} , Yijiang Xia _{6,

7,

8,

9} , Shibin Yin _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

用于整体水分解的高效双功能催化剂：多孔的Fe-Mo氧化物杂化纳米棒

用于氧分解反应（OER）和氢分解反应（HER）的高效且廉价的双功能催化剂对于水分解至关重要。在这里，我们通过水热法成功地制备了多孔的Fe-Mo氧化物杂化纳米棒，然后进行了高温退火。它们在碱性介质中对OER和HER表现出出色的催化活性，并在200和66 mV的超电势下产生10 mA cm ^-2的电流密度。此外，它们可作为双功能电极材料用于整体水分解，在1.52 V的电压下实现10 mA cm ^-2的电流密度，并保持60 mA cm ^-2的电流密度持续60小时。具有自支撑结构的独特形态可以暴露更多的活性位点，促进电荷转移，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整体水分解的廉价和高性能催化材料提供了一条有价值的途径。

更新日期：2020-04-03

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