Electrochemical synthesis of valuable nitrogen-based chemicals using nitrate/nitrite as feedstock under ambient conditions

• Main Author: Lee, Carmen
• Other Authors: Alex Yan Qingyu
• Format: Thesis-Doctor of Philosophy
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Chemistry; Engineering; Materials, electrochemistry
• Online Access: https://hdl.handle.net/10356/173818
• Institution: Nanyang Technological University

The nitrogen cycle has captured the attention of numerous researchers because the creation and breakdown of crucial compounds have significantly transformed both the environment and human health. Examples of these important chemicals include ammonia and urea, which are vital for population growth. Over the past century, there has been a rapid and extensive production of ammonia through the Haber-Bosch process. A considerable portion of this produced ammonia is then utilized in the synthesis of urea by chemically combining it with carbon dioxide. Both these processes are not only energy-intensive but also incur high capital and maintenance costs due to their demanding operating conditions. Additionally, human activities, such as the heavy use of nitrogen-based fertilizer leads to the release of nitrate/nitrite in wastewater, have further contributed to negative environmental impacts. Given these challenges, there is a pressing need to develop a more sustainable approach for producing these chemicals. In this regard, electrochemical synthesis of key chemicals through the reduction of nitrate/nitrite has emerged as an appealing alternative.