Journal
ACS CATALYSIS
Volume 13, Issue 21, Pages 14415-14453Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.3c02410
Keywords
nitrogen-based energy; Haber-Boschprocess; NH3; photoelectro catalysis; plasmacatalysis
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This study summarizes the prospective analysis of nitrogen-based energy carriers, focusing on the renewable synthesis, conversion, and utilization of ammonia. It provides an effective approach for achieving zero carbon emission and paves the way for the development of nitrogen-based energy technologies.
The reliance of a future carbon-free horizon is strongly aligned with the long-term energy storage avenues which are completely derived from renewable energy resources. Ammonia with its high energy content and density can perform as a decent candidate for buffering the short-term storage options. However, the current NH3 production majorly feeding the current huge desire for ammonia is dominated by the conventional nonrenewable Haber-Bosch (H-B) process route, thus continuously damaging the target of carbon neutrality goals. High-purity hydrogen (H-2) gas is an essential precursor for the H-B process; however, it is a significant energy consumer (about 2% of the global energy supply) and contributes over 420 million tons of CO2/annum. Therefore, the research on the renewable synthesis of nitrogen-based energy carriers (such as ammonia) from the direct electrochemical, photocatalytic, or plasma catalytic processes; its conversion; and utilization to the potential derivatives has been a hot topic in the past few decades. A prospective analysis of the highly appealing processes has been summarized in this study, which could facilitate the adaption of renewable alternatives as an effective approach for zero carbon emission, paving the excellent pathways along the road to the development of nitrogen-based energy technologies, especially the targeted development of ammonia. Further, this Review covers the current and future impacts of the H-B process, the development of aspiring ammonia synthesis routes (via electro, photo, bio, chemical loop, or plasma catalysis), and its conversion and utilization to the renewable derivatives in terms of fabrication of model catalysts, advanced characterization technology, and efficient device design.
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