Comparative study for low temperature water-gas shift reaction on Pt/ceria catalysts: Role of different ceria supports

Jain, Rishabh; Poyraz, Altuğ S.; Gamliel, David P.; Valla, Julia A.; Suib, Steven L.; Marić, Radenka

doi:10.1016/j.apcata.2015.09.041

Cited by 53 publications

(40 citation statements)

References 97 publications

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“…This eliminates the intermediate steps of filtration, drying, and calcination. By incorporating a secondary spray system, nanoparticles can also be deposited on various supports such as carbon [47], magneli phase titania [48] and ceria [41,42]. RSDT provides complete control of the nanoparticle size, crystallinity [49], porosity, film thickness, and support concentration [47].…”

Section: Introductionmentioning

confidence: 99%

“…RSDT is a subset of flame spray pyrolysis which was developed by Maric et al [39] for the synthesis of nanoparticles. This process can employ a broad selection of precursors [40][41][42][43][44][45][46] compared to conventional vapor-fed flame reactors. In RSDT, nanoparticles are generated in the flame, and then are either directly deposited on the substrate as a film or collected as a nanopowder.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Jain

Lei

Marić

2016

Sensors and Actuators B: Chemical

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a b s t r a c tA porous tungsten oxide (WO 3 ) NO 2 sensor was developed by a one-step flame based process called Reactive Spray Deposition Technology (RSDT). This nano-crystalline WO 3 film was deposited directly on gold interdigitated electrodes. The sensing characteristics of this NO 2 sensor was measured at the parts per million (ppm) level, (0.17-5 ppm in air) at 300 • C. The sensors showed a relatively fast response time (∼7s) and recovery time (∼5 min), respectively. The stability of the sensor was evaluated for 300 h in 0.5 ppm NO 2 at 300 • C in (2000 response-recovery cycles). The sensor was stable up to 6 days (∼150 h) of continuous operation and degraded between 150-300 h. The morphology and surface properties of the WO 3 film were investigated with XRD, Raman spectroscopy, BET, SEM, TEM, and HRTEM.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Jain

Lei

Marić

2016

Sensors and Actuators B: Chemical

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“…The construction of such tandem catalytic systems requires advanced synthetic methodologies for both the ceria preparation and the active component deposition. The scalable methods of preparation of CeO 2 supports vary from the cerium salts solution hydrolysis to the flame spray pyrolysis . Among these methods the simplest and most straightforward one is the thermal decomposition of cerium salts, such as Ce(NO 3 ) 3 ⋅ 6H 2 O, Ce 2 (C 2 O 4 ) 3 , (NH 4 ) 2 [Ce(NO 3 ) 6 ], and Ce 2 (CO 3 ) 2 O ⋅ H 2 O .…”

Section: Introductionmentioning

confidence: 99%

Cerium(III) Nitrate Derived CeO₂ Support Stabilising PtO_x Active Species for Room Temperature CO Oxidation

et al. 2020

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A new approach for preparing a PtOx/CeO2 catalyst for low‐temperature CO oxidation has been developed. The approach includes; i) preparation of a CeO2 support through the controllable thermal decomposition of Ce(NO3)3 ⋅ 6H2O, and then ii) deposition of polynuclear platinum nitrato complexes ([H3O⊂18‐crown‐6]2[Pt2(μ2‐OH)2(NO3)8][Pt4(μ3‐OH)2(μ2‐OH)4(NO3)10]) on the CeO2 support. The NO3−‐rich ceria support produced at the onset temperature of Ce(NO3)3 ‐> CeO2 transformation (220 °C) yields the “PtOx/CeO2‐220” catalyst that shows intriguingly high activity in CO oxidation, at room temperature and below. To understand the nature of the low‐temperature catalytic activity, prepared catalysts have been studied using X‐ray photoelectron spectroscopy (XPS), Raman and operando X‐ray absorption fine structure spectroscopy (XAFS) and transmission electron microscopy (TEM).

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“…Recent studies have resulted in several WGS catalysts that could be alternatives to those used commercially (Fe–Cr and Cu–Zn–Al). Some authors have focused on the redox properties and the oxygen storage capacity of ceria (CeO 2 ), and then proposed ceria‐supported noble metal catalysts or less expensive ceria‐supported transition metal catalysts such as Cu or Ni as viable alternatives. Recently, a Cu–Ni bimetallic catalyst has been reported to show high performance under reaction conditions , .…”

Section: Introductionmentioning

confidence: 99%

Low‐Cost Catalysts for the Water Gas Shift Reaction Based on Cu–Ni on La‐Promoted Ceria

2018

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Proton‐exchange membrane fuel cells are of great interest for vehicular applications. A highly pure, sustainably obtained H2 stream is desirable to use as the cell feed. In the water gas shift (WGS) process, large amounts of CO, which is a poison for the cell anode, are removed from a bioalcohol‐derived H2 stream before it enters the cell. In this study, Cu–Ni catalysts supported on La‐doped ceria were analyzed and studied in the WGS reaction. The supports were prepared by the urea thermal decomposition method with different percentages of La as a promoter of ceria. The metal phase was incorporated by incipient wet impregnation. Many characterization techniques were employed in this work (BET, XRD, SEM, ICP, TPR, OSC), and the relationship between the resulting properties and catalytic performance was investigated to determine the effect of La. A mixture of Cu and Ni was found to be the most effective active phase, having considerable activity and selectivity towards the desired reaction. Low degrees of La doping in ceria enhance oxygen mobility in the lattice. A commercial Ce salt containing La as its main impurity (ca. 2 %) is a convenient precursor, given its good performance and low cost compared to a high‐purity salt.

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Comparative study for low temperature water-gas shift reaction on Pt/ceria catalysts: Role of different ceria supports

Cited by 53 publications

References 97 publications

Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Cerium(III) Nitrate Derived CeO₂ Support Stabilising PtO_x Active Species for Room Temperature CO Oxidation

Low‐Cost Catalysts for the Water Gas Shift Reaction Based on Cu–Ni on La‐Promoted Ceria

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Comparative study for low temperature water-gas shift reaction on Pt/ceria catalysts: Role of different ceria supports

Cited by 53 publications

References 97 publications

Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Ultra-low NO2 detection by gamma WO3 synthesized by Reactive Spray Deposition Technology

Cerium(III) Nitrate Derived CeO2 Support Stabilising PtOx Active Species for Room Temperature CO Oxidation

Low‐Cost Catalysts for the Water Gas Shift Reaction Based on Cu–Ni on La‐Promoted Ceria

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Cerium(III) Nitrate Derived CeO₂ Support Stabilising PtO_x Active Species for Room Temperature CO Oxidation