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BiVO4 Film Coupling with CoAl2O4 Nanoparticles for Photoelectrochemical Water Splitting Utilizing Broad Solar Spectrum through p–n Heterojunction, Photothermal, and Cocatalytic Synergism
Langmuir ( IF 3.7 ) Pub Date : 2024-08-20 , DOI: 10.1021/acs.langmuir.4c02294 Yujie Huang 1 , Binyao Liu 2 , Yiwen Yang 1 , Hao Xiao 1 , Tao Han 1 , Hanmei Jiang 1 , Jiahe Li 1 , Yong Zhou 3 , Gaili Ke 1 , Huichao He 1
Langmuir ( IF 3.7 ) Pub Date : 2024-08-20 , DOI: 10.1021/acs.langmuir.4c02294 Yujie Huang 1 , Binyao Liu 2 , Yiwen Yang 1 , Hao Xiao 1 , Tao Han 1 , Hanmei Jiang 1 , Jiahe Li 1 , Yong Zhou 3 , Gaili Ke 1 , Huichao He 1
Affiliation
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Water oxidation is an endothermic and kinetics–sluggish reaction; the research of photoanodes with photothermal and cocatalytic properties is of great significance. Herein, BiVO4/CoAl2O4 film photoanodes were studied for solar water splitting through coupling spinel p-type CoAl2O4 nanoparticles on n-type BiVO4 films. Compared to the BiVO4 photoanode, better performance was observed on the BiVO4/CoAl2O4 photoanode during water oxidation. A photocurrent of 3.47 mA/cm2 was produced on the BiVO4/CoAl2O4 photoanode at 1.23 V vs RHE, which is two-fold to the BiVO4 photoanode (1.70 mA/cm2). Additionally, the BiVO4/CoAl2O4 photoanodes showed an acceptable stability for water oxidation. The BiVO4/CoAl2O4 photoanode being of higher water oxidation performance could be attributed to the presence of p–n heterojunction, cocatalytic, and photothermal effects. In specific, under the excitation of λ < 520 nm light, the holes produced in/on BiVO4 can be transferred to CoAl2O4 owing to the p–n heterojunctions of BiVO4/CoAl2O4. Meanwhile, the temperature on the BiVO4/CoAl2O4 photoanode rises quickly up to ∼53 °C under AM 1.5 G irradiation due to the photothermal property of CoAl2O4 through capturing the 520 < λ < 720 nm light. The temperature rising on the BiVO4/CoAl2O4 photoanode improves the cocatalytic activity of CoAl2O4 and modifies the wettability of BiVO4/CoAl2O4 for effective water oxidation.
中文翻译：
BiVO4 薄膜与 CoAl2O4 纳米颗粒耦合，通过 p-n 异质结、光热和共催化协同作用，利用宽太阳光谱进行光电化学水分解
水氧化是吸热且动力学缓慢的反应；具有光热和助催化性能的光阳极的研究具有重要意义。在此，研究了通过在n型BiVO 4薄膜上耦合尖晶石p型CoAl 2 O 4纳米颗粒来用于太阳能水分解的BiVO 4 /CoAl 2 O 4薄膜光阳极。与BiVO 4光阳极相比，BiVO 4 /CoAl 2 O 4光阳极在水氧化过程中观察到更好的性能。在1.23 V vs RHE下，在BiVO 4 /CoAl 2 O 4光电阳极上产生3.47 mA/cm 2的光电流，这是BiVO 4光电阳极(1.70 mA/cm 2 )的两倍。此外，BiVO 4 /CoAl 2 O 4光阳极表现出可接受的水氧化稳定性。 BiVO 4 /CoAl 2 O 4光阳极具有较高的水氧化性能，这可能归因于p-n异质结、共催化和光热效应的存在。具体来说，在λ < 520 nm光的激发下，由于BiVO 4 /CoAl 2 O 4的p-n异质结，BiVO 4中/上产生的空穴可以转移到CoAl 2 O 4上。同时，由于CoAl 2 O 4的光热特性，通过捕获520 < λ < 720 nm光，BiVO 4 /CoAl 2 O 4光阳极上的温度在AM 1.5 G照射下迅速上升至~53 °C。 BiVO 4 /CoAl 2 O 4光阳极上的温度升高提高了CoAl 2 O 4的助催化活性并改变了BiVO 4 /CoAl 2 O 4的润湿性以有效氧化水。
更新日期：2024-08-20
中文翻译：
BiVO4 薄膜与 CoAl2O4 纳米颗粒耦合，通过 p-n 异质结、光热和共催化协同作用，利用宽太阳光谱进行光电化学水分解
水氧化是吸热且动力学缓慢的反应；具有光热和助催化性能的光阳极的研究具有重要意义。在此，研究了通过在n型BiVO 4薄膜上耦合尖晶石p型CoAl 2 O 4纳米颗粒来用于太阳能水分解的BiVO 4 /CoAl 2 O 4薄膜光阳极。与BiVO 4光阳极相比，BiVO 4 /CoAl 2 O 4光阳极在水氧化过程中观察到更好的性能。在1.23 V vs RHE下，在BiVO 4 /CoAl 2 O 4光电阳极上产生3.47 mA/cm 2的光电流，这是BiVO 4光电阳极(1.70 mA/cm 2 )的两倍。此外，BiVO 4 /CoAl 2 O 4光阳极表现出可接受的水氧化稳定性。 BiVO 4 /CoAl 2 O 4光阳极具有较高的水氧化性能，这可能归因于p-n异质结、共催化和光热效应的存在。具体来说，在λ < 520 nm光的激发下，由于BiVO 4 /CoAl 2 O 4的p-n异质结，BiVO 4中/上产生的空穴可以转移到CoAl 2 O 4上。同时，由于CoAl 2 O 4的光热特性，通过捕获520 < λ < 720 nm光，BiVO 4 /CoAl 2 O 4光阳极上的温度在AM 1.5 G照射下迅速上升至~53 °C。 BiVO 4 /CoAl 2 O 4光阳极上的温度升高提高了CoAl 2 O 4的助催化活性并改变了BiVO 4 /CoAl 2 O 4的润湿性以有效氧化水。
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