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Self-assembly of Pt nanocrystals into three-dimensional superlattices results in enhanced electrocatalytic performance for methanol oxidation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xu, Guangran Liu, Jiayin Liu, Baocang Zhang, Jun |
| Copyright Year | 2019 |
| Abstract | Because of the collective effects emerging from integrated nanostructures, more and more research endeavors have been dedicated to realizing the self-organization of nanostructures into complex integrated architectures with multiple functionalities. Thus, the self-organization of nanostructures into higher-order superstructures is becoming an attractive theme in materials research of nanoscience. Herein, we develop a simple and low-temperature solution approach without the need of any preformed Pt seeds to directly realize a series of three-dimensional (3D) Pt nanocrystal superlattices (NSLs) composed of well-defined interior Pt nanocrystals assembled into 3D face-centered cubic (fcc) superlattice structures. The effects of experimental parameters including solvents, surfactants and structure-directing agents on the assembly behavior, structural configuration, and morphological arrangement of 3D Pt NSLs are systematically studied. Through modulating the experimental parameters, the self-organization of 3D Pt NSLs can be elegantly controlled, and an in-depth mechanism depicting the pathway for Pt nanocrystals self-organized into various 3D Pt NSLs is proposed. The optimal 3D Pt NSLs used as an efficient electrocatalyst exhibit excellent catalytic performance with CO-tolerant catalytic ability and long-term stability for the methanol oxidation reaction (MOR) with a mass activity of 403 mA mgPt−1, which is 2 times higher than that of a commercial 20% Pt/C electrocatalyst (200 mA mgPt−1). This work provides a pathway to realize robust higher-order 3D Pt NSLs with enhanced electrocatalytic performance for the MOR. The long-term stability and the CO-tolerant catalytic ability of 3D Pt NSLs are anticipated to lead to an ideal system with relevance to applications in the renewable energy field. |
| Starting Page | 411 |
| Ending Page | 419 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C8CE01382A |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c8/ce/c8ce01382a/c8ce01382a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C8CE01382A |
| Volume Number | 21 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
