Nitrogen reduction to ammonia at high efficiency and rates based on a phosphonium proton shuttle

doi:10.1126/science.abg2371

GSTDTAP > 气候变化

DOI	10.1126/science.abg2371
	Nitrogen reduction to ammonia at high efficiency and rates based on a phosphonium proton shuttle
	Bryan H. R. Suryanto; Karolina Matuszek; Jaecheol Choi; Rebecca Y. Hodgetts; Hoang-Long Du; Jacinta M. Bakker; Colin S. M. Kang; Pavel V. Cherepanov; Alexandr N. Simonov; Douglas R. MacFarlane
	2021-06-11
发表期刊	Science
出版年	2021
英文摘要	An electrochemical route to ammonia could substantially lower the greenhouse gas emissions associated with the current thermal Haber-Bosch process. One relatively promising option under study involves reductive formation of lithium nitride, which can be protonated to ammonia. However, the ethanol used to date as a local proton source in these studies may degrade under the reaction conditions. Suryanto et al. report the use of a tetraalkyl phosphonium salt in place of ethanol (see the Perspective by Westhead et al. ). This cation can stably undergo deprotonation–reprotonation cycles and, as an added benefit, it enhances the ionic conductivity of the medium. Science , abg2371, this issue p. [1187][1]; see also abi8329, p. [1149][2] Ammonia (NH3) is a globally important commodity for fertilizer production, but its synthesis by the Haber-Bosch process causes substantial emissions of carbon dioxide. Alternative, zero-carbon emission NH3 synthesis methods being explored include the promising electrochemical lithium-mediated nitrogen reduction reaction, which has nonetheless required sacrificial sources of protons. In this study, a phosphonium salt is introduced as a proton shuttle to help resolve this limitation. The salt also provides additional ionic conductivity, enabling high NH3 production rates of 53 ± 1 nanomoles per second per square centimeter at 69 ± 1% faradaic efficiency in 20-hour experiments under 0.5-bar hydrogen and 19.5-bar nitrogen. Continuous operation for more than 3 days is demonstrated. [1]: /lookup/doi/10.1126/science.abg2371 [2]: /lookup/doi/10.1126/science.abi8329
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/329911
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Bryan H. R. Suryanto,Karolina Matuszek,Jaecheol Choi,et al. Nitrogen reduction to ammonia at high efficiency and rates based on a phosphonium proton shuttle[J]. Science,2021.
APA	Bryan H. R. Suryanto.,Karolina Matuszek.,Jaecheol Choi.,Rebecca Y. Hodgetts.,Hoang-Long Du.,...&Douglas R. MacFarlane.(2021).Nitrogen reduction to ammonia at high efficiency and rates based on a phosphonium proton shuttle.Science.
MLA	Bryan H. R. Suryanto,et al."Nitrogen reduction to ammonia at high efficiency and rates based on a phosphonium proton shuttle".Science (2021).