Wei Kecheng, Guan Huanqin, Luo Qiang, He Jie, Sun Shouheng
Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA.
Nanoscale. 2022 Aug 25;14(33):11869-11891. doi: 10.1039/d2nr02894h.
Given the continuous and excessive CO emission into the atmosphere from anthropomorphic activities, there is now a growing demand for negative carbon emission technologies, which requires efficient capture and conversion of CO to value-added chemicals. This review highlights recent advances in CO capture and conversion chemistry and processes. It first summarizes various adsorbent materials that have been developed for CO capture, including hydroxide-, amine-, and metal organic framework-based adsorbents. It then reviews recent efforts devoted to two types of CO conversion reaction: thermochemical CO hydrogenation and electrochemical CO reduction. While thermal hydrogenation reactions are often accomplished in the presence of H, electrochemical reactions are realized by direct use of electricity that can be renewably generated from solar and wind power. The key to the success of these reactions is to develop efficient catalysts and to rationally engineer the catalyst-electrolyte interfaces. The review further covers recent studies in integrating CO capture and conversion processes so that energy efficiency for the overall CO capture and conversion can be optimized. Lastly, the review briefs some new approaches and future directions of coupling direct air capture and CO conversion technologies as solutions to negative carbon emission and energy sustainability.
鉴于人为活动向大气中持续且过量排放一氧化碳，如今对负碳排放技术的需求日益增长，这需要将一氧化碳高效捕获并转化为增值化学品。本综述重点介绍了一氧化碳捕获与转化化学及工艺的最新进展。它首先总结了已开发用于一氧化碳捕获的各种吸附材料，包括基于氢氧化物、胺和金属有机框架的吸附剂。然后回顾了近期针对两类一氧化碳转化反应所做的努力：热化学一氧化碳加氢和电化学一氧化碳还原。热加氢反应通常在氢气存在的情况下完成，而电化学反应则通过直接使用可从太阳能和风能可再生产生的电能来实现。这些反应成功的关键在于开发高效催化剂并合理设计催化剂 - 电解质界面。该综述还进一步涵盖了近期关于整合一氧化碳捕获与转化过程的研究，以便能够优化一氧化碳整体捕获与转化的能源效率。最后，该综述简要介绍了一些新方法以及将直接空气捕获与一氧化碳转化技术相结合作为负碳排放和能源可持续性解决方案的未来方向。
