Light-Induced Activation of Adaptive Junction for Efficient Solar-Driven Oxygen Evolution

In Situ Unraveling the Interfacial Metal–Silicon Junction

Ching Wei Tung, Tsung Rong Kuo, Chia Shuo Hsu, Yen Chuang, Hsiao Chien Chen, Chung Kai Chang, Chia Ying Chien, Ying Jui Lu, Ting Shan Chan, Jyh Fu Lee, Jiun Yun Li, Hao Ming Chen

研究成果: 雜誌貢獻文章

摘要

The integration of surface metal catalysts with semiconductor absorbers to produce photocatalytic devices is an attractive method for achieving high-efficiency solar-induced water splitting. However, once combined with a photoanode, detailed discussions of the light-induced processes on metal/semiconductor junction remain largely inadequate. Here, by employing in situ X-ray scattering/diffraction and absorption spectroscopy, the generation of a photoinduced adaptive structure is discovered at the interfacial metal–semiconductor (M–S) junction between a state-of-the-art porous silicon wire and nickel electrocatalyst, where oxygen evolution occurs under illumination. The adaptive layer in M–S junction through the light-induced activation can enhance the voltage by 247 mV (to reach a photocurrent density of 10 mA cm−2) with regard to the fresh photoanode, and increase the photocurrent density by six times at the potential of 1.23 V versus reversible reference electrode (RHE). This photoinduced adaptive layer offers a new perspective regarding the catalytic behavior of catalysts, especially for the photocatalytic water splitting of the system, and acting as a key aspect in the development of highly efficient photoelectrodes.

原文英語
文章編號1901308
期刊Advanced Energy Materials
DOIs
出版狀態已發佈 - 一月 1 2019

指紋

Photocurrents
Metals
Chemical activation
Semiconductor junctions
Oxygen
Catalysts
Water
Electrocatalysts
Porous silicon
Nickel
X ray scattering
Absorption spectroscopy
Diffraction
Lighting
Wire
Semiconductor materials
Electrodes
Electric potential

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

引用此文

Light-Induced Activation of Adaptive Junction for Efficient Solar-Driven Oxygen Evolution : In Situ Unraveling the Interfacial Metal–Silicon Junction. / Tung, Ching Wei; Kuo, Tsung Rong; Hsu, Chia Shuo; Chuang, Yen; Chen, Hsiao Chien; Chang, Chung Kai; Chien, Chia Ying; Lu, Ying Jui; Chan, Ting Shan; Lee, Jyh Fu; Li, Jiun Yun; Chen, Hao Ming.

於: Advanced Energy Materials, 01.01.2019.

研究成果: 雜誌貢獻文章

Tung, Ching Wei ; Kuo, Tsung Rong ; Hsu, Chia Shuo ; Chuang, Yen ; Chen, Hsiao Chien ; Chang, Chung Kai ; Chien, Chia Ying ; Lu, Ying Jui ; Chan, Ting Shan ; Lee, Jyh Fu ; Li, Jiun Yun ; Chen, Hao Ming. / Light-Induced Activation of Adaptive Junction for Efficient Solar-Driven Oxygen Evolution : In Situ Unraveling the Interfacial Metal–Silicon Junction. 於: Advanced Energy Materials. 2019.
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abstract = "The integration of surface metal catalysts with semiconductor absorbers to produce photocatalytic devices is an attractive method for achieving high-efficiency solar-induced water splitting. However, once combined with a photoanode, detailed discussions of the light-induced processes on metal/semiconductor junction remain largely inadequate. Here, by employing in situ X-ray scattering/diffraction and absorption spectroscopy, the generation of a photoinduced adaptive structure is discovered at the interfacial metal–semiconductor (M–S) junction between a state-of-the-art porous silicon wire and nickel electrocatalyst, where oxygen evolution occurs under illumination. The adaptive layer in M–S junction through the light-induced activation can enhance the voltage by 247 mV (to reach a photocurrent density of 10 mA cm−2) with regard to the fresh photoanode, and increase the photocurrent density by six times at the potential of 1.23 V versus reversible reference electrode (RHE). This photoinduced adaptive layer offers a new perspective regarding the catalytic behavior of catalysts, especially for the photocatalytic water splitting of the system, and acting as a key aspect in the development of highly efficient photoelectrodes.",
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