{"title":"Manipulating local CO2/H2O ratio in electrocatalytic CO2 reduction toward multi-carbon product","authors":"Na Qiu, Wei Lu, Hai-Qing Wang","doi":"10.1007/s12598-024-02919-y","DOIUrl":null,"url":null,"abstract":"<p>Electrocatalytic CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) has been developed as a promising and attractive strategy to close the anthropogenic carbon cycle. Among various reduction products, multi-carbon (C<sub>2+</sub>) oxygenate and hydrocarbon compounds are desirable value-added fuels or chemicals. Extensive researches have revealed the crucial role of local CO<sub>2</sub> and H<sub>2</sub>O concentrations (or the adsorption of *CO and *H) close to the electrode/catalyst surface in manipulating multi-carbon generation pathways. In this mini reviews, we mainly summarized the recent progress of this field over the past five years. The modulating strategies for the hydrogen and carbon species ratio can be divided into three categories, i.e., catalyst morphology, electrolyte composition and mass transfer. The effectiveness of the aforementioned strategies in promoting multi-carbon product selectivity was discussed in detail from the perspectives of tuning the local CO<sub>2</sub> and H<sub>2</sub>O concentrations and the subsequent thermodynamic- and kinetic-controlled *CO and *H ratios. Finally, the critical challenges remaining in balancing the ratio of CO<sub>2</sub> and H<sub>2</sub>O as well as potential upgrading directions for future research are addressed.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"14 1","pages":""},"PeriodicalIF":9.6000,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02919-y","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Electrocatalytic CO2 reduction reaction (CO2RR) has been developed as a promising and attractive strategy to close the anthropogenic carbon cycle. Among various reduction products, multi-carbon (C2+) oxygenate and hydrocarbon compounds are desirable value-added fuels or chemicals. Extensive researches have revealed the crucial role of local CO2 and H2O concentrations (or the adsorption of *CO and *H) close to the electrode/catalyst surface in manipulating multi-carbon generation pathways. In this mini reviews, we mainly summarized the recent progress of this field over the past five years. The modulating strategies for the hydrogen and carbon species ratio can be divided into three categories, i.e., catalyst morphology, electrolyte composition and mass transfer. The effectiveness of the aforementioned strategies in promoting multi-carbon product selectivity was discussed in detail from the perspectives of tuning the local CO2 and H2O concentrations and the subsequent thermodynamic- and kinetic-controlled *CO and *H ratios. Finally, the critical challenges remaining in balancing the ratio of CO2 and H2O as well as potential upgrading directions for future research are addressed.
期刊介绍：
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.
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