Catalytic behavior of Ru supported on Ce0.8Zr0.2O2 for hydrogen production

Carbajal-Ramos, I.A.; Gómez, Manuel F.; Condó, A.M.; Bengió, S.; Andrade-Gamboa, J.; Abello, M. Cristina; Gennari, F.C.

doi:10.1016/j.apcatb.2015.07.025

Cited by 27 publications

(11 citation statements)

References 77 publications

(95 reference statements)

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“…Its introduction onto CeO 2 and (CeZr)O 2 has shown benefits for hydrogen production from glycerol [22]. Ru based catalysts have been studied previously for steam reforming of ethanol [23], oxidative steam reforming [24], CO 2 activation [25] ,and ammonia synthesis [26].…”

Section: Introductionmentioning

confidence: 99%

Reactions of ethanol over CeO2 and Ru/CeO2 catalysts

Mudiyanselage

Al‐Shankiti

Foulis

et al. 2016

Applied Catalysis B: Environmental

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The reaction of ethanol has been investigated on Ru/CeO 2 in steady state conditions as well as with temperature programmed desorption (TPD). High resolution transmission electron microscopy (HRTEM) images indicated that the used catalyst contained Ru particles with a mean size of ca. 1.5 nm well dispersed on CeO 2 (of about 12-15 nm in size). Surface uptake of ethanol was measured by changing exposure to ethanol followed by TPD. Saturation coverage is found to be between 0.25 and 0.33 of a monolayer for CeO 2 that has been prior heated with O 2 at 773 K. The main reactions of ethanol on CeO 2 during TPD are: re-combinative desorption of ethanol; dehydrogenation to acetaldehyde; and dehydration to ethylene. The dehydration to ethylene occurs mainly in a small temperature window at about 700 K and it is attributed to ethoxides adsorbed on surface-oxygen defects. The presence of Ru considerably modified the reaction of ceria towards ethanol. It has switched the desorption products to CO, CO 2 , CH 4 and H 2. These latter products are typical reforming products. Ethanol steam reforming (ESR) conducted on Ru/CeO 2 indicated that optimal reaction activity is at about 673 K above which CO 2 production declines (together with that of H 2) due to reverse water gas shift. This trend was well captured during ethanol TPD where CO 2 desorbed about 50 K below than CO on both oxidized and reduced Ru/CeO 2 catalysts.

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Section: Introductionmentioning

confidence: 99%

Reactions of ethanol over CeO2 and Ru/CeO2 catalysts

Mudiyanselage

Al‐Shankiti

Foulis

et al. 2016

Applied Catalysis B: Environmental

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“…The case of CeO 2 , which is widely used as a redox catalyst, owing to its intrinsic ability to easily store and release oxygen species during a catalytic event (also known as oxygen storage capacity, OSC), is of particular interest [161, 162] . The OSC of ceria can indeed be altered by forming a composite with other oxides, such as ZrO 2 and CuO [151, 163] . CuO‐CeO 2 composites, prepared by ball milling CuO and CeO 2 together, showed higher reducibility than the individual components and exhibited much higher OSC values, which increased with the milling duration (Figure 23 a).…”

Section: Mixed Oxides and Nanocomposite Catalystsmentioning

confidence: 99%

Mechanochemical Synthesis of Catalytic Materials

Amrute

Bellis

Felderhoff

et al. 2021

Chemistry A European J

164

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The mechanochemical synthesis of nanomaterials for catalytic applications is a growing research field due to its simplicity, scalability, and eco‐friendliness. Besides, it provides materials with distinct features, such as nanocrystallinity, high defect concentration, and close interaction of the components in a system, which are, in most cases, unattainable by conventional routes. Consequently, this research field has recently become highly popular, particularly for the preparation of catalytic materials for various applications, ranging from chemical production over energy conversion catalysis to environmental protection. In this Review, recent studies on mechanochemistry for the synthesis of catalytic materials are discussed. Emphasis is placed on the straightforwardness of the mechanochemical route—in contrast to more conventional synthesis—in fabricating the materials, which otherwise often require harsh conditions. Distinct material properties achieved by mechanochemistry are related to their improved catalytic performance.

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“…The broad signal can be deconvoluted to several peaks in a range of 280-292 eV, indicative of multiple oxidation states of Ru n+ ions. 56,57 The O1s spectra for MLCRO materials are shown in Fig. 2(C).…”

Section: X-ray Photoelectron Spectra (Xps)mentioning

confidence: 99%