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DOI | 10.1126/science.aat8051 |
Tunable intrinsic strain in two-dimensional transition metal electrocatalysts | |
Wang, Lei1; Zeng, Zhenhua2; Gao, Wenpei3; Maxson, Tristan2; Raciti, David1; Giroux, Michael1; Pan, Xiaoqing3,4; Wang, Chao1; Greeley, Jeffrey2 | |
2019-02-22 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 363期号:6429页码:870-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Tuning surface strain is a powerful strategy for tailoring the reactivity of metal catalysts. Traditionally, surface strain is imposed by external stress from a heterogeneous substrate, but the effect is often obscured by interfacial reconstructions and nanocatalyst geometries. Here, we report on a strategy to resolve these problems by exploiting intrinsic surface stresses in two-dimensional transition metal nanosheets. Density functional theory calculations indicate that attractive interactions between surface atoms lead to tensile surface stresses that exert a pressure on the order of 10(5) atmospheres on the surface atoms and impart up to 10% compressive strain, with the exact magnitude inversely proportional to the nanosheet thickness. Atomic-level control of thickness thus enables generation and fine-tuning of intrinsic strain to optimize catalytic reactivity, which was confirmed experimentally on Pd(110) nanosheets for the oxygen reduction and hydrogen evolution reactions, with activity enhancements that were more than an order of magnitude greater than those of their nanoparticle counterparts. |
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:000459387100044 |
WOS关键词 | OXYGEN REDUCTION REACTION ; PALLADIUM NANOSHEETS ; HYDROGEN EVOLUTION ; CATALYTIC-ACTIVITY ; ELASTIC STRAIN ; SURFACE ; PLATINUM ; STRESS ; NANOPARTICLES ; RECONSTRUCTION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/200822 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA; 2.Purdue Univ, Davidson Sch Chem Engn, W Lafayette, IN 47907 USA; 3.Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA; 4.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA |
推荐引用方式 GB/T 7714 | Wang, Lei,Zeng, Zhenhua,Gao, Wenpei,et al. Tunable intrinsic strain in two-dimensional transition metal electrocatalysts[J]. SCIENCE,2019,363(6429):870-+. |
APA | Wang, Lei.,Zeng, Zhenhua.,Gao, Wenpei.,Maxson, Tristan.,Raciti, David.,...&Greeley, Jeffrey.(2019).Tunable intrinsic strain in two-dimensional transition metal electrocatalysts.SCIENCE,363(6429),870-+. |
MLA | Wang, Lei,et al."Tunable intrinsic strain in two-dimensional transition metal electrocatalysts".SCIENCE 363.6429(2019):870-+. |
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