Intermetallic FePt@PtBi Core–Shell Nanoparticles for Oxygen Reduction Electrocatalysis
| العنوان: | Intermetallic FePt@PtBi Core–Shell Nanoparticles for Oxygen Reduction Electrocatalysis |
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| المؤلفون: | Shaoxuan Yang, Jingyu Guan, Tongtong Liu, Zhengping Zhang, Jin Niu, Yihuan Yu, Feng Wang |
| المصدر: | Angewandte Chemie International Edition. 60:21899-21904 |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, Alloy, Intermetallic, chemistry.chemical_element, Nanoparticle, General Medicine, General Chemistry, engineering.material, Surface engineering, Electrocatalyst, Catalysis, chemistry.chemical_compound, chemistry, Chemical engineering, Coating, engineering, Platinum, Carbon monoxide |
| الوصف: | The development of active and stable platinum (Pt)-based oxygen reduction reaction (ORR) electrocatalysts with good resistance to poisoning is a prerequisite for widespread practical application of fuel cells. An effective strategy for enhancing the electrocatalytic performance is to tune or control the physicochemical state of the Pt surface. Herein, we show a general surface-engineering approach to prepare a range of nanostructured Pt alloys by coating with alloy PtBi shells. FePt@PtBi core-shell nanoparticles showed the best ORR performance with a mass activity of 0.96 A mgPt-1 and a specific activity of 2.06 mA cm-2 , respectively 7 times and 11 times those of the corresponding values for benchmark Pt/C. Moreover, FePt@PtBi shows much better tolerance to methanol and carbon monoxide than conventional Pt-based electrocatalysts. The observed comprehensive enhancement in ORR performance of FePt@PtBi can be attributed to the increased compressive strain of the Pt surface due to in-plane shearing resulting from the presence of the large Bi atoms in the surface-structured PtBi overlayers, as well as charge displacement via Pt-Bi bonding which mitigates crossover issues. |
| تدمد: | 1521-3773 1433-7851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95de6e1b2bd25321207a7367119ef46b https://doi.org/10.1002/anie.202107437 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....95de6e1b2bd25321207a7367119ef46b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213773 14337851 |
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