Conference
Synthesis of Palladium-Rhodium bimetallic Nanoparticles for Formic Acid Dehydrogenation
| العنوان: | Synthesis of Palladium-Rhodium bimetallic Nanoparticles for Formic Acid Dehydrogenation |
|---|---|
| المؤلفون: | Ilaria Barlocco, Sofia Capelli, Elisa Zanella, Xiaowei Chen, Juan J. Delgado, Alberto Villa |
| المساهمون: | I. Barlocco, S. Capelli, E. Zanella, X. Chen, J.J. Delgado, A. Villa |
| سنة النشر: | 2021 |
| المجموعة: | The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
| مصطلحات موضوعية: | Settore CHIM/03 - Chimica Generale e Inorganica, Settore ING-IND/22 - Scienza e Tecnologia dei Materiali |
| الوصف: | Noble metals alloyed nanoparticles are fundamental for several essential industrial processes. Although academia is switching its attention on cheaper and abundant transition metals, industries continue to employ noble metal-based catalysts due to their higher catalytic performance. For these reasons a key challenge is to modify these catalysts, increasing their activity, selectivity and stability. In particular, palladium-based catalysts are widely employed in different types of heterogeneous catalytic reactions 1. The addition of a second metal to Pd can tune the catalytic properties of the material due to the formation of new electronic states (ligand effect) combined with the strain of the lattice (steric effects) 2. Rhodium also plays a fundamental role in many reactions such as formic acid hydrogenation3. Formic acid (FA) is a non-toxic compound obtained from catalytic conversion of biomass and it possesses a high hydrogen content (4.4 wt%). FA can be easily decomposed into CO2 and H2 (the desired reaction) and CO and H2O. Unfortunately, the formation of carbon monoxide is detrimental for the catalysts because of its affinity with metals. The selective decomposition of formic acid can act as an elegant way to store hydrogen and recycling CO2 to formic acid again 4. Ham and coworkers used theoretical calculation to demonstrate that the addition of Rh to Pd enhance the activity of pure Pd in the formic acid dehydrogenation, enhancing the selectivity to H2 and avoiding the formation of CO which acts as poison for Pd catalysts. The beneficial effect of introduction Rh to Pd was attributed to a contraction of surface Pd-Pd distance and the increase in the electron density in surface Pd atoms compared to pure Pd 5. Herein, we report the synthesis of preformed bimetallic Pd-Rh nanoparticles with different Pd:Rh ratios (nominal molar ratio: 80-20, 60- 40, 40-60, 20-80) and the corresponding Pd and Rh monometallic ones by sol immobilization using polyvinyl alcohol (PVA) as protective agent and NaBH4 as reducing ... |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | ICheaP-International Conference on Chemical and Process Engineering; http://hdl.handle.net/2434/829347; https://www.aidic.it/icheap15/ |
| الاتاحة: | http://hdl.handle.net/2434/829347 https://www.aidic.it/icheap15/ |
| رقم الانضمام: | edsbas.667D505 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |