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Cu3Mo2O9/BiVO4 Heterojunction Films with Integrated Thermodynamic and Kinetic Advantages for Solar Water Oxidation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-08-31 , DOI: 10.1021/acssuschemeng.0c04561 Biao Xiong 1 , Yuting Wu 1 , Jinyan Du 1 , Jie Li 1 , Binyao Liu 1 , Gaili Ke 1 , Huichao He 1 , Yong Zhou 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-08-31 , DOI: 10.1021/acssuschemeng.0c04561 Biao Xiong 1 , Yuting Wu 1 , Jinyan Du 1 , Jie Li 1 , Binyao Liu 1 , Gaili Ke 1 , Huichao He 1 , Yong Zhou 2
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The development of BiVO4-based heterojunction photoanodes with thermodynamic and kinetic advantages is one of the breakthrough directions to fulfill the potential of BiVO4 for solar water splitting. Here, we designed and investigated a Cu3Mo2O9/BiVO4 heterojunction film photoanode that consisted of p-type Cu3Mo2O9 nanoparticles and an n-type BiVO4 film for water oxidation. Compared to the BiVO4 film, the resultant Cu3Mo2O9/BiVO4 heterojunction film shows better activity and stability during water oxidation owing to the synergistic effect of the p–n heterojunction and Cu3Mo2O9 cocatalysis. Specifically, the formed p–n heterojunctions of Cu3Mo2O9/BiVO4 are thermodynamically favorable to the separation and transfer of photoexcited holes–electrons, which result in a higher activity of the Cu3Mo2O9/BiVO4 photoanode for water oxidation. Meanwhile, the Cu3Mo2O9 electrocatalysis could be initiated by the photoexcited holes of BiVO4, which can enhance the water oxidation kinetics and stability of the Cu3Mo2O9/BiVO4 film photoanode. Our study provides a reference to design BiVO4-based heterojunction photoanodes with integrated advantages in thermodynamics and kinetics for water splitting.
中文翻译：
具有热动力学和动力学综合优势的Cu 3 Mo 2 O 9 / BiVO 4异质结薄膜用于太阳能氧化
具有热力学和动力学优势的基于BiVO 4的异质结光阳极的开发是实现BiVO 4用于太阳能水分解的潜力的突破性方向之一。在这里，我们设计并研究了由p型Cu 3 Mo 2 O 9纳米粒子和n型BiVO 4膜组成的Cu 3 Mo 2 O 9 / BiVO 4异质结膜光电阳极，用于水氧化。与BiVO 4膜相比，所得的Cu 3 Mo 2 O 9 / BiVO 4由于p–n异质结和Cu 3 Mo 2 O 9的协同催化作用，异质结膜在水氧化过程中表现出更好的活性和稳定性。特别是，Cu 3 Mo 2 O 9 / BiVO 4形成的p–n异质结在热力学上有利于光激发空穴-电子的分离和转移，从而导致Cu 3 Mo 2 O 9 / BiVO 4光电阳极的活性更高。用于水氧化。同时，Cu 3 Mo 2 O 9BiVO 4的光激发空穴可以引发电催化作用，可以增强Cu 3 Mo 2 O 9 / BiVO 4薄膜光阳极的水氧化动力学和稳定性。我们的研究为设计基于BiVO 4的异质结光阳极提供了参考，该阳极在水分解的热力学和动力学方面具有综合优势。
更新日期：2020-09-21
中文翻译：
具有热动力学和动力学综合优势的Cu 3 Mo 2 O 9 / BiVO 4异质结薄膜用于太阳能氧化
具有热力学和动力学优势的基于BiVO 4的异质结光阳极的开发是实现BiVO 4用于太阳能水分解的潜力的突破性方向之一。在这里，我们设计并研究了由p型Cu 3 Mo 2 O 9纳米粒子和n型BiVO 4膜组成的Cu 3 Mo 2 O 9 / BiVO 4异质结膜光电阳极，用于水氧化。与BiVO 4膜相比，所得的Cu 3 Mo 2 O 9 / BiVO 4由于p–n异质结和Cu 3 Mo 2 O 9的协同催化作用，异质结膜在水氧化过程中表现出更好的活性和稳定性。特别是，Cu 3 Mo 2 O 9 / BiVO 4形成的p–n异质结在热力学上有利于光激发空穴-电子的分离和转移，从而导致Cu 3 Mo 2 O 9 / BiVO 4光电阳极的活性更高。用于水氧化。同时，Cu 3 Mo 2 O 9BiVO 4的光激发空穴可以引发电催化作用，可以增强Cu 3 Mo 2 O 9 / BiVO 4薄膜光阳极的水氧化动力学和稳定性。我们的研究为设计基于BiVO 4的异质结光阳极提供了参考，该阳极在水分解的热力学和动力学方面具有综合优势。
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