Artificial Leaf for Solar-Driven Ammonia Conversion at Milligram-Scale Using Triple Junction III-V Photoelectrode

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

5 Scopus Citations
View graph of relations

Author(s)

  • Hao Huang
  • Dharmaraj Periyanagounder
  • Cailing Chen
  • Qiong Lei
  • Yu Han
  • Kuo-Wei Huang

Detail(s)

Original languageEnglish
Article number2205808
Journal / PublicationAdvanced Science
Volume10
Issue number14
Online published22 Mar 2023
Publication statusPublished - 17 May 2023

Link(s)

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.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Download Statistics

No data available