Steering the methanol steam reforming performance of Cu/ZrO2 catalysts by modification of the Cu-ZrO2 interface dimensions resulting from Cu loading variation

Ploner, Kevin; Nezhad, Parastoo Delir Kheyrollahi; Watschinger, Maximilian; Schlicker, Lukas; Bekheet, Maged F.; Gurlo, Aleksander; Gili, Albert; Doran, Andrew; Schwarz, Sabine; Stöger-Pollach, Michael; Bernardi, Johannes; Armbrüster, Marc; Klötzer, Bernhard; Penner, Simon

doi:10.1016/j.apcata.2021.118279

Cited by 18 publications

(8 citation statements)

References 36 publications

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“…It is noted that the size of metallic Cu nanoparticles is confirmed to be greater with higher loadings, which results in a lower proportion of Cu–O v –Ce interfacial sites as well as Cu + sites that are formed by electronic interaction at these regions. 22,33 Therefore, we assign the two bands at 2110–2106 and 2089–2088 cm −1 to CO adsorption on Cu 0 and Cu + sites, respectively. Our assignment contradicts the literature, possibly due to the distinct particle size, morphology, and degree of metal–support interactions.…”

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confidence: 99%

“…25 These structural evolutions can involve changes of oxidation states, 26 molecular structures, 27 interface geometries, [28][29][30][31][32] and nanoparticle morphologies. 33 For Cu/CeO 2 catalysts, the presence of Cu + /Cu 0 and Ce 3+ /Ce 4+ redox pairs also lead to complex valence alterations. 34 Particularly, the interchange of Ce 3+ /Ce 4+ can result in the evolution of the atomic structure, such as strong metal-support interaction (SMSI), highlighting the necessity to investigate the dynamic structure of supported Cu/CeO 2 catalysts.…”

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confidence: 99%

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Dynamics of the Cu/CeO₂catalyst during methanol steam reforming

Jin

Wang

et al. 2022

Catal. Sci. Technol.

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confidence: 99%

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confidence: 99%

Dynamics of the Cu/CeO₂catalyst during methanol steam reforming

Jin

Wang

et al. 2022

Catal. Sci. Technol.

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“…It has been reported that Cu/ZrO 2 catalysts can be prepared in various ways, such as co-precipitation of metal salts, copper impregnation on ZrO 2 supports, amorphous aerogel formation, and polymer templating techniques [82]. Ploner et al prepared a Cu/ZrO 2 catalyst based on a similar procedure of water impregnation, which improved the activity and selectivity of methanol reforming for hydrogen production by changing the copper loading [40]. It was found that the Cu/ZrO 2 catalyst prepared by the fractional precipitation method can improve the activity and stability of the catalyst.…”

Section: Improving Preparation Methodsmentioning

confidence: 99%

“…There are four typical ways to produce hydrogen from methanol: methanol decomposition (MD) [30][31][32], partial oxidation of methanol (POM) [33][34][35], steam reforming of methanol (SRM) [9,36], and oxidative steam reforming of methanol (OSRM) [37][38][39]. Methanol reforming can produce a large amount of hydrogen, which is one of the important reasons why it is widely studied by researchers [40][41][42]. SRM also contains two side reactions, which are methanol decomposition and water gas shift reactions [43].…”

Section: Introductionmentioning

confidence: 99%

Advances in Enhancing the Stability of Cu-Based Catalysts for Methanol Reforming

Xiao

Lai

et al. 2022

Catalysts

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The advent of fuel cells has led to a series of studies on hydrogen production. As an excellent hydrogen carrier, methanol can be used for reforming to produce hydrogen. Copper-based catalysts have been widely used in methanol reforming due to their high catalytic activity and low-cost preparation. However, copper-based catalysts have been subjected to poor stability due to spontaneous combustion, sintering, and deactivation. Thus, the research on the optimization of copper-based catalysts is of great significance. This review analyzes several major factors that affect the stability of copper-based catalysts, and then comments on the progress made in recent years to improve the catalytic stability through various methods, such as developing preparation methods, adding promoters, and optimizing supports. A large number of studies have shown that sintering and carbon deposition are the main reasons for the deactivation of copper-based catalysts. It was found that the catalysts prepared by the modified impregnation method exhibit higher catalytic activity and stability. For the promoters and supports, it was also found that the doping of metal oxides such as MgO and bimetallic oxides such as CeO2-ZrO2 as the support could present better catalytic performance for the methanol reforming reaction. It is of great significance to discover some new materials, such as copper-based spinel oxide, with a sustained-release catalytic mechanism for enhancing the stability of Cu-based catalysts. However, the interaction mechanism between the metal and the support is not fully understood, and the research of some new material copper-based catalysts in methanol reforming has not been fully studied. These are the problems to be solved in the future.

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“…In case of methanol In accordance with thermodynamics, reaction (1) dominates at low temperatures that in many cases make it possible to obtain products with low CO content. For this, it is necessary to carry out the process using catalysts based on copper, nickel, or noble metals [17][18][19][20][21][22][23]. In particular, high catalytic activity of nickel-copper and platinum-rhodium alloys has been shown [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Methanol Steam Reforming on Bimetallic Catalysts Based on In and Nb Doped Titania or Zirconia: A Support Effect

2021

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Methanol steam reforming (MSR) is considered an effective method for hydrogen storage and to generate high-quality hydrogen for fuel cells. In this work, a comprehensive investigation of the methanol steam reforming process using a bimetallic Pt–Rh and Cu–Ni based on different oxide supports is presented. Highly dispersed titania and zirconia doped with indium and niobium ions were synthesized by sol–gel method. The effect of the nature and quantity of the dopant cation (In, Nb) on the catalytic performance of titania supported metal catalysts was investigated. The conclusions obtained show a significant effect of both the metal alloy and the oxide support nature on the activity and selectivity of the methanol steam reforming process. Pt–Rh alloy catalyst shows higher hydrogen yield, but its selectivity in the MSR process is lower than for the catalysts containing the Cu0.8-Ni0.2 alloy. Heterovalent indium doping of titania leads to the catalytic activity increase. It was suggested that this is due to the defects formation in the oxygen TiO2 sublattice. On the contrary, the use of niobium oxide as a dopant decreases the catalyst activity in the methanol steam reforming process but leads to the selectivity increase in the studied process.

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Steering the methanol steam reforming performance of Cu/ZrO2 catalysts by modification of the Cu-ZrO2 interface dimensions resulting from Cu loading variation

Cited by 18 publications

References 36 publications

Dynamics of the Cu/CeO₂catalyst during methanol steam reforming

Dynamics of the Cu/CeO₂catalyst during methanol steam reforming

Advances in Enhancing the Stability of Cu-Based Catalysts for Methanol Reforming

Methanol Steam Reforming on Bimetallic Catalysts Based on In and Nb Doped Titania or Zirconia: A Support Effect

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Steering the methanol steam reforming performance of Cu/ZrO2 catalysts by modification of the Cu-ZrO2 interface dimensions resulting from Cu loading variation

Cited by 18 publications

References 36 publications

Dynamics of the Cu/CeO2catalyst during methanol steam reforming

Dynamics of the Cu/CeO2catalyst during methanol steam reforming

Advances in Enhancing the Stability of Cu-Based Catalysts for Methanol Reforming

Methanol Steam Reforming on Bimetallic Catalysts Based on In and Nb Doped Titania or Zirconia: A Support Effect

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Dynamics of the Cu/CeO₂catalyst during methanol steam reforming

Dynamics of the Cu/CeO₂catalyst during methanol steam reforming