Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1126/science.aao3691 |
Selective increase in CO2 electroreduction activity at grain-boundary surface terminations | |
Mariano, Ruperto G.1; McKelvey, Kim2,3; White, Henry S.2; Kanan, Matthew W.1 | |
2017-12-01 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 358期号:6367页码:1187-1191 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Ireland |
英文摘要 | Altering amaterial's catalytic properties requires identifying structural features that give rise to active surfaces. Grain boundaries create strained regions in polycrystalline materials by stabilizing dislocations and may provide a way to create high-energy surfaces for catalysis that are kinetically trapped. Although grain-boundary density has previously been correlated with catalytic activity for some reactions, direct evidence that grain boundaries create surfaces with enhanced activity is lacking. We used a combination of bulk electrochemical measurements and scanning electrochemical cell microscopy with submicrometer resolution to show that grain-boundary surface terminations in gold electrodes are more active than grain surfaces for electrochemical carbon dioxide (CO2) reduction to carbon monoxide (CO) but not for the competing hydrogen (H-2) evolution reaction. The catalytic footprint of the grain boundary is commensurate with its dislocation-induced strain field, providing a strategy for broader exploitation of grain-boundary effects in heterogeneous catalysis. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416584000042 |
WOS关键词 | ELECTRON BACKSCATTER DIFFRACTION ; HYDROGEN EVOLUTION REACTION ; DISLOCATION DENSITY DISTRIBUTIONS ; ELECTROCHEMICAL-CELL MICROSCOPY ; OXYGEN REDUCTION REACTION ; NANOSCALE ELECTROCHEMISTRY ; PLATINUM-ELECTRODES ; GOLD NANOPARTICLES ; CARBON NANOTUBES ; STRAIN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/197440 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Stanford Univ, Dept Chem, 337 Campus Dr, Stanford, CA 94305 USA; 2.Univ Utah, Dept Chem, 315 S 1400 E, Salt Lake City, UT 84112 USA; 3.Trinity Coll Dublin, Sch Chem, Dublin 2, Ireland |
推荐引用方式 GB/T 7714 | Mariano, Ruperto G.,McKelvey, Kim,White, Henry S.,et al. Selective increase in CO2 electroreduction activity at grain-boundary surface terminations[J]. SCIENCE,2017,358(6367):1187-1191. |
APA | Mariano, Ruperto G.,McKelvey, Kim,White, Henry S.,&Kanan, Matthew W..(2017).Selective increase in CO2 electroreduction activity at grain-boundary surface terminations.SCIENCE,358(6367),1187-1191. |
MLA | Mariano, Ruperto G.,et al."Selective increase in CO2 electroreduction activity at grain-boundary surface terminations".SCIENCE 358.6367(2017):1187-1191. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论