Academic Journal
Highly Effective Pt-Co/ZSM-5 Catalysts with Low Pt Loading for Preferential CO Oxidation in H2-Rich Mixture
| العنوان: | Highly Effective Pt-Co/ZSM-5 Catalysts with Low Pt Loading for Preferential CO Oxidation in H2-Rich Mixture |
|---|---|
| المؤلفون: | Marina Shilina, Irina Krotova, Sergey Nikolaev, Sergey Gurevich, Denis Yavsin, Olga Udalova, Tatiana Rostovshchikova |
| المصدر: | Hydrogen, Vol 4, Iss 1, Pp 154-173 (2023) |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Science (General) |
| مصطلحات موضوعية: | hydrogen purification technologies, CO-PROX, platinum, laser electrodispersion, cobalt, zeolite, Science (General), Q1-390 |
| الوصف: | New Pt-Co catalysts of hydrogen purification from CO impurities for fuel cells were fabricated via the deposition of monodispersed 1.7 nm Pt nanoparticles using laser electrodispersion on Co-modified ZSM-5 prepared by the Co(CH3COO)2 impregnation. The structure of prepared Pt-Co zeolites was studied by low-temperature N2 sorption, TEM, EDX, and XPS methods. The comparative analysis of samples with different Pt (0.01–0.05 wt.%) and Co (2.5–4.5 wt.%) contents on zeolites with the ratio of Si/Al = 15, 28, and 40 was performed in the CO-PROX reaction in H2-rich mixture (1%CO + 1%O2 + 49%H2 + 49%He). The synergistic catalytic action of Pt and Co on zeolite surface makes it possible to completely remove CO from a mixture with hydrogen in a wide temperature range from 50 to 150 °C; the high efficiency of designed composites with low Pt loading is maintained for a long time. The enhancement of PROX performance originates from the formation of new active sites for the CO oxidation at the Pt-Co interfaces within zeolite channels and at the surface. In terms of their activity, stability, and selectivity, such composites are significantly superior to known supported Pt-Co catalysts. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2673-4141 |
| Relation: | https://www.mdpi.com/2673-4141/4/1/11; https://doaj.org/toc/2673-4141 |
| DOI: | 10.3390/hydrogen4010011 |
| URL الوصول: | https://doaj.org/article/ef89e66791f141b4a84da7dc0201c653 |
| رقم الانضمام: | edsdoj.f89e66791f141b4a84da7dc0201c653 |
| قاعدة البيانات: | Directory of Open Access Journals |
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