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Abstract Development of efficient catalysts for ammonia decomposition is crucial for hydrogen production from ammonia. Herein, Ru nanoparticles (NPs) highly dispersed on Pr2O3 (Ru/Pr2O3) were prepared and investigated as catalyst for ammonia decomposition reaction. Under relatively high weight hourly space velocity (WHSV = …
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Herein, we report a novel HOR catalyst, RuNi1, in which Ni is atomically dispersed on the Ru nanocrystals. To note, the as-prepared RuNi1 catalyst exhibits excellent catalytic activity and stability for HOR in alkaline media, which is superior to those of Ru-Ni bimetallic nanocrystals, pristine Ru, and commercial Pt/C catalysts.
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O-vacancies are defects commonly correlated with the production of CH 4 by CO 2 hydrogenation on reducible catalysts. Their effect on the stability of active CO ads and its origin is, however, not commonly explored for low Ru-loaded catalysts (Ru < 0.5 wt%). Herein, we investigated two catalysts containing a comparable amount of Ru (≈ 0.4 wt%) …
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Because Azure Cosmos DB distributes the provisioned throughput equally across all the partition key ranges, P1 and P2 each can scale between 1000 - 10,000 RU/s. Suppose in a 1 minute interval, in a given second, P1 consumed 6000 request units and P2 consumed 8000 request units. The normalized RU consumption of P1 is 60% and 80% …
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Potassium-promoted ruthenium supported on CaO is a very efficient catalyst for ammonia decomposition, surpassing the performance of other Ru-supported solids. At an optimum Ru loading of 3% wt, catalysts with a K/Ru atomic ratio of 0.9 showed the best catalytic performance under a wide range of operating con
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A comparative investigation was performed to examine the intrinsic catalytic activity and durability of carbon supported Ru, Ir, and Pt nanoparticles and corresponding bulk materials for the electrocatalytic oxygen evolution reaction (OER). The electrochemical surface characteristics of nanoparticles and bulk materials were studied by surface …
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Bu durumda endirekt ekstrüzyon basıncı (pe ); Malzemenin mukavemetine,ekstrüzyon oranına ve kalıp geometrisine bağlı olarak değişir. pe = f (, R,, ) Ekstrüzyonda deformasyon homojen değildir.Buna göre; pe = Q e = ( 0,8 + 1,2 lnR ) bağıntısıyla hesaplanabilir. = malzemenin ortalama plastik gerilmesidir.
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The Ru/CoO hybrid catalyst was fabricated in-situ on conductive substrates by cation exchange route combined with chemical reduction. As shown in Fig. 1 (a and b), the Ru/CoO hybrid catalysts densely cover the entire carbon fibre and well maintain the one-dimensional morphology of CoO NRs (Fig. S1 and Fig. S2). The energy dispersive …
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The rate of metallic Ru performance deterioration, especially in alkaline electrolyte, was, however, much higher than that of metallic Ir. An analogous conclusion was drawn in a similar study by Reier et al. [39]. In a similar manner to Ru electrodes, iridium oxides are much more stable than the metal [27], [40], [41], [42]. Note, that in all ...
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The alkaline electrocatalytic hydrogen evolution reaction (HER) is an attractive strategy to realize efficient conversion of electric energy to chemical energy. 1-6 Pt is recognized as the most efficient catalyst for HER. However, the scarcity and high-cost of Pt greatly impedes its practical applications. 7-9 Ru is a promising substitute for Pt due …
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The nitridation process forming nitrided-Ru(NPs), which are imperfectly covered by a G N shell, allows superb long-term operation durability. The catalyst splits water into molecular oxygen and hydrogen at 1.50/1.40 V (in 0.1 m HClO 4 /1 m KOH), demonstrating its potential as a ready-to-use, highly effective energy device for industrial ...
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Ru (001) exhibits a more negative ΔG H* value of −0.43 eV, indicating excessive strong adsorption of H, which impedes the desorption of H. For the model of Ru/SnO 2, the ΔG H* value of Ru sites is −0.36 eV, suggesting the optimized Ru−H binding energy. In addition, the Sn−H binding energy (close to the Ru sites) is also improved.
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Ekstrüzyon kelimesi Türkçe'de "yüksek pasınç altında püskürtme" anlamına gelir. Fransızca extrusion "yüksek pasınç altında püskürtme" sözcüğünden alıntıdır. Fransızca sözcük Latince extrudere, extrus- "püskürtmek" fiilinden +tion sonekiyle türetilmiştir. Bu sözcük Latince trudere, trus- "itmek" fiilinden ...
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