Photoelectrochemical Synthesis of Ammonia on the Aerophilic-Hydrophilic Heterostructure with 37.8% Efficiency

Jianyun Zheng, Yanhong Lyu, Man Qiao, Ruilun Wang, Yangyang Zhou, Hao Li, Chen Chen, Yafei Li*, Huaijuan Zhou, San Ping Jiang, Shuangyin Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

255 Citations (Scopus)

Abstract

Liquid ammonia can be the key enabler for being an easily transported energy storage carrier, which is highly desirable to be produced from renewable energy, such as solar or electricity, under eco-friendly and mild conditions. However, innovation in the photoelectrochemical devices with high activity, stability, and selectivity for nitrogen-to-ammonia fixation has proven to be very challenging because nitrogen reduction reaction competes with the hydrogen evolution reaction, which occurs preferentially on the photocathode surface at a comparable thermodynamic potential. Thus, we have designed a unique aerophilic-hydrophilic heterostructured Si-based photocathode for improving the energy conversion efficiency. The aerophilic-hydrophilic heterostructure provides a new insight on designing efficient and robust photocathodes for nitrogen fixation.

Original languageEnglish
Pages (from-to)617-633
Number of pages17
JournalChem
Volume5
Issue number3
DOIs
Publication statusPublished - 14 Mar 2019
Externally publishedYes

Keywords

  • SDG2: Zero hunger
  • SDG3: Good health and well-being
  • Si-based photocathodes
  • aerophilic-hydrophilic
  • heterostructure
  • high faradic efficiency
  • photoelectrochemical nitrogen reduction reaction

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