The removal of carbon monoxide by iron oxide nanoparticles

Li, Ping; Miser, Donald E.; Rabiei, Shahryar; Yadav, Ramkuber T.; Hajaligol, Mohammad R.

doi:10.1016/s0926-3373(02)00297-7

Cited by 363 publications

(219 citation statements)

References 12 publications

Supporting

Mentioning

200

Contrasting

Unclassified

Order By: Relevance

“…The reaction showed zero-order kinetics for O 2 and first order for CO at 520 -570 K [44,45]. Microkinetic modeling revealed that the reaction between CO and surface O species is the rate-determining step [46].…”

Section: General Discussion and Proposed Mechanismmentioning

confidence: 96%

“…Oxidation of CO on iron oxides (Fe 2 O 3 ) has been previously studied both experimentally and theoretically [45][46][47][48]. The reaction is typically carried out at temperatures above 500 K in excess of oxygen, although the reaction may occur even in the absence of external oxygen over iron oxide nanoparticles [45].…”

Section: General Discussion and Proposed Mechanismmentioning

confidence: 99%

“…The reaction is typically carried out at temperatures above 500 K in excess of oxygen, although the reaction may occur even in the absence of external oxygen over iron oxide nanoparticles [45]. It was found that the reaction proceeds through dissociative adsorption of O 2 , which is considered to be a non-activated process, and removal of oxygen by a gas-phase CO via an Eley-Rideal type mechanism.…”

Section: General Discussion and Proposed Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Monolayer iron oxide film on platinum promotes low temperature CO oxidation

Sun

Qin

Lewandowski

et al. 2009

Journal of Catalysis

221

236

View full text Add to dashboard Cite

Abstract. CO oxidation on a clean Pt(111) single crystal and thin iron oxide films grown on Pt(111) was studied at different CO:O 2 ratios (between 1:5 and 5:1) and partial pressures up to 60 mbar at 400 -450 K. Structural characterization of the model catalysts was performed by scanning tunneling microscopy, low energy electron diffraction, Auger electron spectroscopy and temperature programmed desorption. It is found that monolayer FeO (111) films grown on Pt(111) are much more active than clean Pt(111) and nm-thick Fe 3 O 4 (111) films at all reaction conditions studied. Post-characterization of the catalysts revealed that at CO:O 2 >1 the FeO(111) film dewets the Pt surface with time, ultimately resulting in highly dispersed iron oxide particles on Pt(111). The film dewetting was monitored in situ by polarisation-modulated infrared reflection absorption spectroscopy. The reaction rate at 450 K exhibited first order for O 2 and non-monotonously depended on CO pressure. In O 2 -rich ambient the films were enriched with oxygen while maintaining the long range ordering.Based on the structure-reactivity relationships observed for the FeO/Pt films, we propose that the reaction proceeds through the formation of a well-ordered, oxygen-rich FeO x (1 < x < 2) film that reacts with CO through the redox mechanism. The reaction induced dewetting in fact deactivates the catalyst. The results may aid in our deeper understanding of reactivity of metal particles encapsulated by thin oxide films as a result of strong metal support interaction.

show abstract

Section: General Discussion and Proposed Mechanismmentioning

confidence: 96%

Section: General Discussion and Proposed Mechanismmentioning

confidence: 99%

Section: General Discussion and Proposed Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Monolayer iron oxide film on platinum promotes low temperature CO oxidation

Sun

Qin

Lewandowski

et al. 2009

Journal of Catalysis

221

236

View full text Add to dashboard Cite

show abstract

“…The large surface area will ensure that there is sufficient contact between reactant gases and the catalyst/oxidant. We have identified NANOCAT® Fe 2 O 3 as a very promising candidate for this application (11). Iron oxide powder has been tried before to remove CO from cigarette smoke without much success (12).…”

Section: Nanocat® Fe 2 O 3 As a Single Catalyst/oxidant In Cigarette mentioning

confidence: 99%

“…The reaction produces N 2 and CO 2 . The freshly formed Fe is a catalyst for the disproportionation reaction of CO that produces carbon and CO 2 and thus further removes CO (11). Therefore, the multiple functions of one single material such as NANOCAT® Fe 2 O 3 , could be used in the cigarette filler for the simultaneous CO and NO removal as summarized below: a) In the pyrolysis zone, Fe 2 O 3 is used as a catalyst for the CO oxidation by O 2 :…”

Section: Nanocat® Fe 2 O 3 As a Single Catalyst/oxidant In Cigarette mentioning

confidence: 99%

Application of Nanoparticle Iron Oxide in Cigarette for Simultaneous CO and NO Removal in the Mainstream Smoke

Rasouli

Hajaligol

2004

Contributions to Tobacco &Amp; Nicotine Research

View full text Add to dashboard Cite

SUMMARYBased on the unique temperature and oxygen profiles in a burning cigarette, a novel approach is proposed in this paper to use a single oxidant/catalyst in the cigarette filler for simultaneous removal of carbon monoxide (CO) and nitric oxide (NO) in mainstream smoke. A nanoparticle iron oxide is identified as a very active material for this application due to its multiple functions as a CO catalyst, as a CO oxidant, and in its reduced forms as a NO catalyst. The multiple functions of the nanoparticle iron oxide are characterized in a flow tube reactor and the working mechanisms of these multiple functions for CO and NO removal in a burning cigarette are explained. The effect of smoke condensate on the catalyst are examined and discussed.

show abstract

Tuning the Morphology of Metal Oxides for Catalytic Applications

Shen

2013

Nanocatalysis Synthesis and Applications

View full text Add to dashboard Cite

The removal of carbon monoxide by iron oxide nanoparticles

Cited by 363 publications

References 12 publications

Monolayer iron oxide film on platinum promotes low temperature CO oxidation

Monolayer iron oxide film on platinum promotes low temperature CO oxidation

Application of Nanoparticle Iron Oxide in Cigarette for Simultaneous CO and NO Removal in the Mainstream Smoke

Tuning the Morphology of Metal Oxides for Catalytic Applications

Contact Info

Product

Resources

About