A new dynamic N<sub>2</sub>O reduction system based on Rh/ceria–zirconia: from mechanistic insight towards a practical application

Wang, Yixiao; Boer, Jorrit Postuma de; Makkee, Michiel

doi:10.1039/d0cy02035d

Cited by 3 publications

(1 citation statement)

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“…According to extensive studies, Rh is generally considered the most active catalytic component for the decomposition of N 2 O in the presence of O 2 and H 2 O, although its activity is higher in the absence of O 2 and H 2 O. − The choice of a support for the Rh catalyst is very important, and the effects of supports have been extensively investigated. The materials used as supports for Rh include simple metal oxides, such as Al 2 O 3 , CeO 2 , ZrO 2 , and TiO 2 ; mixed oxides; mesoporous materials; and zeolites. − Researchers at BASF evaluated ∼30 Rh-based catalysts, including metal-oxide-supported Rh and Rh-incorporated spinel materials derived from hydrotalcites, and Rh/zeolite catalysts, under conditions relevant to diesel applications . The effects of O 2 and H 2 O cofeeds and hydrothermal aging on the catalytic activity in N 2 O decomposition were systematically investigated, and Rh/CeO 2 was identified as the most promising catalyst.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst

et al. 2022

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The removal of N 2 O from the atmosphere by its catalytic decomposition to N 2 and O 2 is an important process for curbing global warming. In this study, we investigated a variety of catalysts, and a ZrO 2 -supported RhO x (RhO x /ZrO 2 ) catalyst was identified as the optimum catalyst for N 2 O decomposition at a relatively low temperature (∼350 °C) in the presence of O 2 . RhO x supported on ZrO 2 performs better than RhO x loaded on other supports, as well as other metal oxides supported on ZrO 2 and Cu-and Fe-based zeolite catalysts. The average particle sizes of RhO x in RhO x /ZrO 2 at Rh loadings of 1, 5, 10, and 15 wt % were 1.5, 1.9, 2.0, and 2.5 nm, respectively. According to the catalytic decomposition rate per Rh used, the loading amount of Rh species has a significant impact on the efficiency of N 2 O decomposition, with the optimal Rh loading being 10 wt % (Rh metal basis). The apparent activation energy (E a ) for the catalytic decomposition of N 2 O over RhO x /ZrO 2 with 10 wt % Rh was 111 kJ mol −1 , which is almost the same as that for bulk Rh 2 O 3 (110 kJ mol −1 ). These results suggest that the RhO x species in relatively large particles serve more effectively as catalytically active sites compared to those in particles smaller than 1.5 nm. Moreover, kinetic studies and in situ/operando X-ray absorption spectroscopy studies revealed that the reaction is mediated by the redox cycles of the RhO x species, during which N 2 O acts as an oxidizing agent to fill the oxygen vacancies that are created upon heating with concomitant formation of molecular O 2 .

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Section: Introductionmentioning

confidence: 99%

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst

et al. 2022

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Review of nitrous oxide direct catalytic decomposition and selective catalytic reduction catalysts

Zhuang,

Guan,

Chen

et al. 2024

Chemical Engineering Journal

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Progress and challenges in nitrous oxide decomposition and valorization

Wu,

Du,

Gao

et al. 2024

Chem. Soc. Rev.

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A new dynamic N₂O reduction system based on Rh/ceria–zirconia: from mechanistic insight towards a practical application

Abstract: Simultaneous reduction of N2O in the presence of co-existing oxidants, especially NO, from industrial plants, is a challenging task.

Cited by 3 publications

References 32 publications

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst

Review of nitrous oxide direct catalytic decomposition and selective catalytic reduction catalysts

Progress and challenges in nitrous oxide decomposition and valorization

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A new dynamic N2O reduction system based on Rh/ceria–zirconia: from mechanistic insight towards a practical application

Abstract: Simultaneous reduction of N2O in the presence of co-existing oxidants, especially NO, from industrial plants, is a challenging task.

Cited by 3 publications

References 32 publications

Catalytic Decomposition of N2O in the Presence of O2 through Redox of Rh Oxide in a RhOx/ZrO2 Catalyst

Catalytic Decomposition of N2O in the Presence of O2 through Redox of Rh Oxide in a RhOx/ZrO2 Catalyst

Review of nitrous oxide direct catalytic decomposition and selective catalytic reduction catalysts

Progress and challenges in nitrous oxide decomposition and valorization

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Product

Resources

About

A new dynamic N₂O reduction system based on Rh/ceria–zirconia: from mechanistic insight towards a practical application

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst

Catalytic Decomposition of N₂O in the Presence of O₂ through Redox of Rh Oxide in a RhO_x/ZrO₂ Catalyst