{"title":"晶体缺陷对纯铜电催化二氧化碳还原性能的影响","authors":"Shengnan Hao , Kaveh Edalati , Qingsheng Gao , Huai-Jun Lin","doi":"10.1016/j.scriptamat.2024.116268","DOIUrl":null,"url":null,"abstract":"<div><p>Cu-based materials are promising electrochemical catalysts for CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) to synthesize various products of hydrocarbons and oxygenates. Crystal defects including vacancies, dislocations, grain boundaries can basically control the product selectivity of CO<sub>2</sub>RR. However, experimental evidence is lacking on the impact of crystal defects on the electrocatalytic CO<sub>2</sub>RR performance of bulk Cu-based alloys. In this study, 10 mm diameter pure Cu discs with carefully engineered dislocations, grain boundaries are prepared through high-pressure torsion (HPT) combined with annealing treatment, and the effect of crystal defects on electrocatalytic CO<sub>2</sub>RR performance is systematically studied. Compared with Cu discs with a small number of grain boundaries and a large number of dislocations, Cu discs with a large number of grain boundaries and a low density of dislocations show much better CO<sub>2</sub>RR performances, especially in terms of the generation of CO and high-value products such as C<sub>2</sub>H<sub>4</sub>.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of crystal defects on the electrocatalytic CO2 reduction performance of pure copper\",\"authors\":\"Shengnan Hao , Kaveh Edalati , Qingsheng Gao , Huai-Jun Lin\",\"doi\":\"10.1016/j.scriptamat.2024.116268\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Cu-based materials are promising electrochemical catalysts for CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) to synthesize various products of hydrocarbons and oxygenates. Crystal defects including vacancies, dislocations, grain boundaries can basically control the product selectivity of CO<sub>2</sub>RR. However, experimental evidence is lacking on the impact of crystal defects on the electrocatalytic CO<sub>2</sub>RR performance of bulk Cu-based alloys. In this study, 10 mm diameter pure Cu discs with carefully engineered dislocations, grain boundaries are prepared through high-pressure torsion (HPT) combined with annealing treatment, and the effect of crystal defects on electrocatalytic CO<sub>2</sub>RR performance is systematically studied. Compared with Cu discs with a small number of grain boundaries and a large number of dislocations, Cu discs with a large number of grain boundaries and a low density of dislocations show much better CO<sub>2</sub>RR performances, especially in terms of the generation of CO and high-value products such as C<sub>2</sub>H<sub>4</sub>.</p></div>\",\"PeriodicalId\":423,\"journal\":{\"name\":\"Scripta Materialia\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-07-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Scripta Materialia\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1359646224003038\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359646224003038","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Effect of crystal defects on the electrocatalytic CO2 reduction performance of pure copper
Cu-based materials are promising electrochemical catalysts for CO2 reduction reaction (CO2RR) to synthesize various products of hydrocarbons and oxygenates. Crystal defects including vacancies, dislocations, grain boundaries can basically control the product selectivity of CO2RR. However, experimental evidence is lacking on the impact of crystal defects on the electrocatalytic CO2RR performance of bulk Cu-based alloys. In this study, 10 mm diameter pure Cu discs with carefully engineered dislocations, grain boundaries are prepared through high-pressure torsion (HPT) combined with annealing treatment, and the effect of crystal defects on electrocatalytic CO2RR performance is systematically studied. Compared with Cu discs with a small number of grain boundaries and a large number of dislocations, Cu discs with a large number of grain boundaries and a low density of dislocations show much better CO2RR performances, especially in terms of the generation of CO and high-value products such as C2H4.
期刊介绍:
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.