Atoms diffusion-induced phase engineering of platinum-gold alloy nanocrystals with high electrocatalytic performance for the formic acid oxidation reaction
| Autor: | Yong-Qiang Kang, Mancheng Hu, Hui-Min Liu, Yu Chen, Ya-Nan Zhai, Fumin Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Alloy chemistry.chemical_element 02 engineering and technology Substrate (electronics) engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry chemistry Chemical engineering Nanocrystal engineering Noble metal Dehydrogenation 0210 nano-technology Platinum Bimetallic strip |
| Zdroj: | Journal of Colloid and Interface Science. 514:299-305 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2017.12.043 |
| Popis: | Bimetallic noble metal nanocrystals have been widely applied in many fields, which generally are synthesized by the wet-chemistry reduction method. This work presents a purposely designed atoms diffusion induced phase engineering of PtAu alloy nanocrystals on platy Au substrate (PtAu-on-Au nanostructures) through simple hydrothermal treatment. Benefitting from the synergistic effects of component and structure, PtAu-on-Au nanostructures remarkably enhance the dehydrogenation pathway of the formic acid oxidation reaction (FAOR), and thus exhibit much higher FAOR activity and durability compared with Pt nanocrystals on platy Au substrate (Pt-on-Au nanostructures) and commercial Pd black due to an excellent stability of platy Au substrate and a high oxidation resistance of PtAu alloy nanocrystals. The atoms diffusion-induced phase engineering demonstrated in this work builds a bridge between the traditional metallurgy and modern nanotechnologies, which also provides some useful insights in developing noble metals based alloyed nanostructures for the energy and environmental applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect