Emerging alternative for artificial ammonia synthesis through catalytic nitrate reduction

Article

Hao, Derek, Chen, Zhi-gang, Figiela, Monika, Stepniak, Izabela, Wei, Wei and Ni, Bing-Jie. 2021. "Emerging alternative for artificial ammonia synthesis through catalytic nitrate reduction." Journal of Materials Science and Technology. 77, pp. 163-168. https://doi.org/10.1016/j.jmst.2020.10.056
Article Title

Emerging alternative for artificial ammonia synthesis through catalytic nitrate reduction

ERA Journal ID4724
Article CategoryArticle
AuthorsHao, Derek, Chen, Zhi-gang, Figiela, Monika, Stepniak, Izabela, Wei, Wei and Ni, Bing-Jie
Journal TitleJournal of Materials Science and Technology
Journal Citation77, pp. 163-168
Number of Pages6
Year2021
PublisherElsevier
Place of PublicationChina
ISSN1005-0302
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jmst.2020.10.056
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S1005030220309798
Abstract

Artificial catalytic synthesis of ammonia has become a hot research frontier in recent years. It is regarded as a promising approach that may replace the Haber-Bosch process and reduce global carbon dioxide emission. However, it is extremely difficult for the cleavage of nitrogen molecules under ambient conditions. Thus the ammonia yield rate is still low and the study is still limited in lab scale. If nitrites or nitrates are used as nitrogen sources, rather than nitrogen gas, the catalytic efficiency can be significantly improved, and the residual nitrate and nitrite contaminations in water systems can be efficiently eliminated and converted to energy sources at the same time. It is an emerging alternative for artificial ammonia synthesis, while there is not enough focus on the reduction of nitrate and nitrite. Herein, we systematically compared the differences between the reduction of nitrogen and nitrates, as well as listed the challenges in this area. The total conversion rate and energy efficiency of catalytic nitrate reduction are much higher than nitrogen gas reduction due to the much higher solubility and better converting pathway, which might be further enhanced by employing catalysts improvement strategies. Further, we also proposed suitable materials as well as a few future researches needs that may help boost the development of artificial ammonia synthesis using nitrate.

KeywordsNitrogen fixation ; Nitrate reduction; Ammonia synthesis; Electrocatalysis ; Photocatalysis
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020400402. Chemical and thermal processes in energy and combustion
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Byline AffiliationsUniversity of Technology Sydney
Centre for Future Materials
University of Queensland
Poznan University of Technology, Poland
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