Monodispersed sub-5.0 nm PtCu nanoalloys as enhanced bifunctional electrocatalysts for oxygen reduction reaction and ethanol oxidation reaction
| Autor: | Qiang Yuan, Ye Wang, Qinghong Zhang, Kai Wang, Zebin Shen, Taiyang Liu, Xun Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemical substance
Alloy Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention Catalysis Anode chemistry.chemical_compound Magazine chemistry Chemical engineering law engineering General Materials Science 0210 nano-technology Bifunctional Science technology and society |
| Zdroj: | Nanoscale. 9:2963-2968 |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/c7nr00193b |
| Popis: | The development of effective electrocatalysts with enhanced activity and stability for both the anode and the cathode reaction in fuel cells still remains a challenge. Here, we report a one-pot route to prepare monodispersed, uniform sub-5.0 nm PtCu alloy polyhedra with a narrow size distribution. These PtCu alloy polyhedra exhibit enhanced electrocatalytic activity for both cathode and anode reactions as compared to the commercial Pt/C catalyst under alkaline conditions. The specific activity and mass activity on Pt68Cu32 nanoalloys are 15 and 2.8 times that on Pt/C catalyst toward oxygen reduction reaction (ORR), respectively. And the peak current density and mass activity on Pt68Cu32 nanoalloys are 11.8 and 2.12 times that on Pt/C catalyst toward ethanol oxidation reaction (EOR), respectively. Furthermore, the as-synthesized Pt68Cu32 nanoalloys have much higher stability than commercial Pt/C black for both ORR and EOR. These experimental results show an effective approach to the development of monodispersed, sub-5.0 nm PtCu nanoalloys as bifunctional electrocatalysts for both the cathode and the anode reaction in fuel cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|