Artificial Leaf for Solar-Driven Ammonia Conversion at Milligram-Scale Using Triple Junction III-V Photoelectrode
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2205808 |
Journal / Publication | Advanced Science |
Volume | 10 |
Issue number | 14 |
Online published | 22 Mar 2023 |
Publication status | Published - 17 May 2023 |
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DOI | DOI |
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Attachment(s) | Documents
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85150914036&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(ad67f04b-3905-488d-a1ea-47ab248a22e5).html |
Abstract
Developing a green and energy-saving alternative to the traditional Haber-Bosch process for converting nitrogen into ammonia is urgently needed. Imitating from biological nitrogen fixation and photosynthesis processes, this work develops a monolithic artificial leaf based on triple junction (3J) InGaP/GaAs/Ge cell for solar-driven ammonia conversion under ambient conditions. A gold layer serves as the catalytic site for nitrogen fixation with photogenerated electrons. The Au/Ti/3J InGaP/GaAs/Ge photoelectrochemical (PEC) device achieves high ammonia production rates and Faradaic efficiencies in a two-electrode system without applying external potential. For example, at 0.2 sunlight intensity, the solar-to-ammonia (STA) conversion efficiency reaches 1.11% and the corresponding Faradaic efficiency is up to 28.9%. By integrating a Ni foil on the anode side for the oxygen evolution reaction (OER), the monolithic artificial leaf exhibits an ammonia production rate of 8.5 µg cm−2 h at 1.5 sunlight intensity. Additionally, a 3 × 3 cm unassisted wireless PEC device is fabricated that produces 1.0039 mg of ammonia in the 36-h durability test. Thus, the new artificial leaf can successfully and directly convert solar energy into chemical energy and generate useful products in an environmentally friendly approach. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.
Research Area(s)
- artificial leaf, large-scale, nitrogen fixation, solar-to-ammonia conversion, triple-junction cell
Citation Format(s)
Artificial Leaf for Solar-Driven Ammonia Conversion at Milligram-Scale Using Triple Junction III-V Photoelectrode. / Huang, Hao; Periyanagounder, Dharmaraj; Chen, Cailing et al.
In: Advanced Science, Vol. 10, No. 14, 2205808, 17.05.2023.
In: Advanced Science, Vol. 10, No. 14, 2205808, 17.05.2023.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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