Effect of preparation routes on the catalytic activity over SmFeO3 oxide

Mori, Masami; Iwamoto, Yuji; Asamoto, Makiko; Itagaki, Yoshiteru; Yahiro, Hidenori; Sadaoka, Yoshihiko; Takase, Satoko; Yuasa, Masayoshi; Shimanoe, Kengo; Kusaba, Hajime; Teraoka, Yasutake

doi:10.1016/j.cattod.2008.08.014

Cited by 33 publications

(25 citation statements)

References 32 publications

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“…The amounts of toluene adsorption were 0.380 Previously, we examined CO oxidation activity of SmFeO 3 , and concluded that Fe could be an activation site for the oxidation reaction. 16) If this conclusion is also applicable for the current system, toluene molecules predominantly adsorb on the added SmO and diffuse onto the Fe activation sites. Excessive amount of Sm 2 O 3 , that is more than 30 wt %, may block the Fe activation sites.…”

Section: Catalytic Activitymentioning

confidence: 80%

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VOC sensing behavior of semiconducting Sm2O3/SmFeO3 mixtures

Itagaki

Fujihashi

Aono

et al. 2015

J. Ceram. Soc. Japan

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Sm 2 O 3 /SmFeO 3 mixed powders were applied to a chemo-resistive VOC (volatile organic compound) gas sensor. The sensor response to 30 ppm toluene gas increased with increasing the Sm 2 O 3 content up to 30 wt %, but decreased by further adding. The addition of Sm 2 O 3 up to 30 wt % also enhanced the catalytic activity for toluene oxidation, as the result of the sensor response. The amount of toluene adsorption increased with increase in the surface Sm concentration. It was concluded that adding Sm 2 O 3 increased the amount of adsorbed VOCs, resulting in the enhancement of the sensor response and the catalytic activity. Furthermore, adding Sm 2 O 3 remarkably shortened the recovery time from the VOCs to air. For the ethanol sensing, adding Sm 2 O 3 was only effective on shortening the recovery time.

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Section: Catalytic Activitymentioning

confidence: 80%

“…We previously examined SSA of SmFeO 3 prepared from the cyanocomplex at different calcination temperatures. 16) SSA value of SmFeO 3 was fairy dependent on the calcination temperature. In particular, SSA value steeply dropped at 800°C, owing to the grain-growth of SmFeO 3 .…”

Section: Catalytic Activitymentioning

confidence: 89%

VOC sensing behavior of semiconducting Sm2O3/SmFeO3 mixtures

Itagaki

Fujihashi

Aono

et al. 2015

J. Ceram. Soc. Japan

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“…Lower and higher binding energy (BE) peaks were identified as lattice oxide (O L ) and adsorbed oxygen (O A ), respectively. (26) The O A / (O A + O L ) ratio on the surface of SmFeO 3 was the highest among the SmBO 3 systems as shown in Table 1. Figure 9 compares XPS spectra between Fe 2 O 3 and SmFeO 3 at O 1s and Fe 2p .…”

Section: Sensing Mechanismmentioning

confidence: 91%

Amperometric Nitrite-Ion Sensor Based on Electrodeposited Sm-Based Perovskite-Type Oxide Thick-Film Electrode

2016

Sensors and Materials

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Perovskite-type oxide SmBO 3 (B = Cr, Mn, Fe, Co) powders were prepared by a polymer precursor method at 750 °С and systematically investigated for electrochemical sensing properties for NO 2 − . The SmBO 3 -modified carbon-felt electrodes could be prepared by an electrophoretic deposition (EPD) method without sintering. Among the oxide deposited electrodes, the SmFeO 3 modified electrode showed the highest sensitivity to NO 2 − with 11.9 mA M −1 cm −2 and a linear sensing range between 5.0 × 10 −5 and 1.0 × 10 −3 M at +0.85 V vs Ag / AgCl with high selectivity for NO 2 − and no response to most other anions. A good correlation was observed between electrochemical activity toward nitrite-ion oxidation and oxygen adsorption properties of the oxides.

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“…In the present study, by adjusting the temperature and time of the hydrothermal treatment as well as the amount of KOH used, we control the distribution of the B-site ions and the oxygen nonstoichiometry of the La 0. 6 Tables 1, 2). In other words, the catalytic activity could be associated with (1) the oxidation state distribution of the Mn ions and (2) the nonstoichiometric oxygen amount of the material [3].…”

Section: Surface Oxygen Species Mn Ion Oxidation States and Reducibmentioning

confidence: 95%

“…The catalytic activity of ABO 3 can be associated with (1) surface area, (2) defect nature and density, and (3) B-site ion redox property. It is generally accepted that these factors can be determined by the conditions for catalyst preparation, such as temperature and time of the hydrothermal treatment, nature of the metal precursor, and base strength of the solution [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Relationship Between Low-Temperature Reducibility and Catalytic Performance of Single-Crystalline La0.6Sr0.4MnO3+δ Microcubes for Toluene Combustion

et al. 2009

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Single-crystalline La 0.6 Sr 0.4 MnO 3?d microcubes of cubic perovskite phase were prepared hydrothermally. The adopted temperature and time of hydrothermal treatment and the amount of KOH used had great effects on the low-temperature reducibility of La 0.6 Sr 0.4 MnO 3?d . The initial H 2 consumption rate of La 0.6 Sr 0.4 MnO 3?d played a vital role in determining its catalytic activity for toluene combustion. It is concluded that the perovskite-type oxide catalyst with a higher initial H 2 consumption rate displayed a higher catalytic activity for the addressed reaction.

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Effect of preparation routes on the catalytic activity over SmFeO3 oxide

Cited by 33 publications

References 32 publications

VOC sensing behavior of semiconducting Sm<sub>2</sub>O<sub>3</sub>/SmFeO<sub>3</sub> mixtures

VOC sensing behavior of semiconducting Sm<sub>2</sub>O<sub>3</sub>/SmFeO<sub>3</sub> mixtures

Amperometric Nitrite-Ion Sensor Based on Electrodeposited Sm-Based Perovskite-Type Oxide Thick-Film Electrode

A Study on the Relationship Between Low-Temperature Reducibility and Catalytic Performance of Single-Crystalline La0.6Sr0.4MnO3+δ Microcubes for Toluene Combustion

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