Directed self-assembly pathways of three-dimensional Pt/Pd nanocrystal superlattice electrocatalysts for enhanced methanol oxidation reaction
文献类型：期刊论文
| 作者 | Xu, GR; Si, R; Liu, JY; Zhang, LY; Gong, X; Gao, R; Liu, BC; Zhang, J |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2018 |
| 卷号 | 6期号:26页码:12759-12767 |
| 关键词 | TOTAL-ENERGY CALCULATIONS AUGMENTED-WAVE METHOD ONE-POT SYNTHESIS BIMETALLIC NANODENDRITES METAL NANOCRYSTALS OXYGEN REDUCTION GREEN SYNTHESIS BASIS-SET ELECTROOXIDATION NANOPARTICLES |
| ISSN号 | 2050-7488 |
| DOI | 10.1039/c8ta03196g |
| 文献子类 | 期刊论文 |
| 英文摘要 | Although considerable interest has been devoted to revealing the formation of vigorous particles, very little is known about the regulating mechanism of these particles being self-assembled into higher-order supercrystals. Herein, we present a robust one-step approach to create three-dimensional (3D) Pt/Pd nanocrystal superlattices (NSLs) via self-assembly of Pt/Pd seeds anchored on polyvinylpyrrolidone chains into 3D networks with the assistance of Pt2+/Pd2+ coordinated N,N-dimethylformamide (DMF) as a bridging backbone linker. The 3D Pt/Pd NSLs are composed of well-defined interior Pt/Pd nanocrystals in a 3D face-centered cubic (fcc) superlattice oriented along the (111), (200) and (220) planes. EXAFS and XPS measurements confirm the strong synergy effect of Pt/Pd in 3D Pt/Pd NSLs due to the rich Pt-0 species on the surface, predicting the enhanced electrocatalytic performance. The DFT calculations further reveal that the electrocatalytic enhancement of 3D Pt/Pd NSLs arises from the improved capability of methanol adsorption on metallic Pt active sites enriched by appropriate Pd alloying and surface nitrogen doping during the synthesis. The 3D Pt/Pd NSLs show a high current density of 952 mA mg(-1), 4.7 times higher than that of the commercial Pt/C catalyst. The self-assembly pathways may be extended to synthesize other 3D noble metal NSLs with enhanced electrocatalytic performance for direct methanol fuel cells. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/30906]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Synfuels China Co Ltd, Natl Energy Ctr Coal Liquids, Beijing 101400, Peoples R China 2.Inner Mongolia Univ, Inner Mongolia Key Lab Nanosci & Nanotechnol, Sch Chem & Chem Engn, Hohhot 010021, Peoples R China 3.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, GR,Si, R,Liu, JY,et al. Directed self-assembly pathways of three-dimensional Pt/Pd nanocrystal superlattice electrocatalysts for enhanced methanol oxidation reaction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(26):12759-12767. |
| APA | Xu, GR.,Si, R.,Liu, JY.,Zhang, LY.,Gong, X.,...&Zhang, J.(2018).Directed self-assembly pathways of three-dimensional Pt/Pd nanocrystal superlattice electrocatalysts for enhanced methanol oxidation reaction.JOURNAL OF MATERIALS CHEMISTRY A,6(26),12759-12767. |
| MLA | Xu, GR,et al."Directed self-assembly pathways of three-dimensional Pt/Pd nanocrystal superlattice electrocatalysts for enhanced methanol oxidation reaction".JOURNAL OF MATERIALS CHEMISTRY A 6.26(2018):12759-12767. |
入库方式： OAI收割
来源：上海应用物理研究所
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