4.7 Review

Photocatalytic fuel cell-A review

期刊

CHEMICAL ENGINEERING JOURNAL
卷 428, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131074

关键词

Photocatalytic fuel cell; Photoelectrodes; Cell configurations; Recovery of chemical energy; Synergistic mechanisms

资金

  1. National Natural Science Foundation of China [21875200, 51905236]
  2. Natural Science Foundation of Hubei Province [2020CFB405]
  3. Research and Innovation Initiatives of WHPU [2020J05]
  4. Central Committee Guides Local Science and Technology Development Special Project of Hubei Province [2019ZYYD059, 2018ZYYD062]
  5. Qinglan Project of Jiangsu Province
  6. Shenzhen Knowledge Innovation Program (Basic Research) [JCYJ20190808181205752]
  7. Ningbo Municipal Government Innovation 2025 Scheme [2018B10023]
  8. Hong Kong Research Grants Council/General Research Fund [CityU11206520]

向作者/读者索取更多资源

Photocatalytic oxidation is widely used for degrading organic pollutants in water and air. Recent technological advancements have integrated photocatalysis into fuel cells to create photocatalytic fuel cells for simultaneous wastewater treatment and electricity production, enhancing PC activity through effective inhibition of electron-hole recombination.
Photocatalytic oxidation has been widely investigated and applied to perform degradation of organic pollutants in water and air. In recent technological advancement, photocatalysis (PC) is integrated into fuel cell (FC) to form photocatalytic fuel cell (PFC) for simultaneous wastewater treatment and production of electricity. In the PFC mechanisms, the organic pollutant, acting as a fuel in the fuel cell component, is decomposed upon light activation at the photoanode and the flow of photoexcited electrons is driven by the potential difference between the two electrodes. Thus, unwanted electron-hole recombination is effectively inhibited, resulting in enhanced PC activity. In other words, the chemical energy stored in the organic pollutant is recovered and converted into useful electricity during the wastewater treatment process. The photoelectrochemical technology can also be implemented for hydrogen generation and carbon dioxide reduction. Various strategies have been investigated for improving the PFC mechanisms through better visible-light photoelectrodes, innovative cell designs, dualphotoelectrode setup, as well as optimal control. In this review, the fundamentals and technological development of PFC will be discussed with special attention to novel cell configurations. With better knowledge and understanding of the PFC, we can identify promising research directions to further develop the PFC technologies.

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