Electrospun La0.8Ce0.2Fe1-xNixO3 perovskite nanofibrous catalysts for CO oxidation

Ma, Yuxia; Ma, Yuyao; Long, Guorong; Buckley, Craig E.; Hu, Xun; Dong, Dehua

doi:10.1016/j.apsadv.2020.100030

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…Therefore, with higher availability of Co particles and increased surface area of the catalyst, more C–H bonds are cracked at the surface, leading to higher reactant conversion and syngas yield over the Co/CeO 2 –La 2 O 3 –ES catalyst. Furthermore, the morphology of the NF catalyst contributes to an increase in reactant conversion rates, as Ma et al 51 have reported that the NF catalyst demonstrated faster mass transfer than other, conventional catalysts. The presence of nanofibers enhances the access of reactant gases to the active metal sites of the catalyst, resulting in an improved ability to dissociate CO 2 and facilitate the oxidation of carbon deposits 41.…”

Section: Resultsmentioning

confidence: 99%

“…3a catalyst. Furthermore, the morphology of the NF catalyst contributes to an increase in reactant conversion rates, as Ma et al [51] have reported that the NF catalyst demonstrated faster mass transfer than other, conventional catalysts. The presence of nanofibers enhances the access of reactant gases to the active metal sites of the catalyst, resulting in an improved ability to dissociate CO 2 and facilitate the oxidation of carbon deposits [41].…”

Section: Catalytic Drm Reaction Studymentioning

confidence: 99%

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Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

et al. 2023

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The prime cause for catalyst deactivation during dry reforming of methane (DRM) has been attributed to the deposition of carbon. Nanofibrous (NF) catalysts are attractive candidates that offer high catalytic activity and stability in DRM. A comparative study between electrospun and impregnated Co/CeO2–La2O3 catalysts in the DRM reaction was carried out to evaluate the merits of the NF catalyst. Application of the electrospun catalyst yielded the highest activity in DRM and showed a substantial improvement in resistance to carbon formation. The unique structure of the NF electrospun catalyst, the robust metal‐support interaction, and the increased surface area could more effectively suppress deactivation of the catalyst during an 8‐h DRM reaction than the impregnated catalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Catalytic Drm Reaction Studymentioning

confidence: 99%

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

et al. 2023

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“…7,8 Numerous research results showed that perovskite-type catalysts may become a substitute for noble metal catalysts due to its excellent catalytic performance. 9,10 Nonthermal plasma (NTP) is widely considered to be a promising technology by introducing plasma into the exhaust gases. 11,12 Numerous research results indicated that NTP can effectively purify exhaust pollutants, high-energy electrons and active substances generated by NTP collide with surrounding gas molecules to produce reactive species, the reactive species actively combine with the environmental pollutants to form a decomposition product.…”

Section: Introductionmentioning

confidence: 99%

“…Since this century, In order to further improve the purification performance of LaCoO 3 for automobile exhaust, the researches on the doping and modification methods of LaCoO 3 has developed rapidly 7,8 . Numerous research results showed that perovskite‐type catalysts may become a substitute for noble metal catalysts due to its excellent catalytic performance 9,10 . Nonthermal plasma (NTP) is widely considered to be a promising technology by introducing plasma into the exhaust gases 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Four‐way purification of automobile exhaust over woody La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts enhanced by NTP

Wang

Guo

Zhang

et al. 2023

Env Prog and Sustain Energy

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In order to enhance the four‐way purification performance of PM, NOx, CO and HC emitted by automobile exhausts over woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts. First, the woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts were modified by nonthermal plasma (NTP). The physicochemical properties of the catalyst surface were characterized utilizing x‐ray diffractometer, Fourier‐transform infrared spectroscopy, x‐ray photoelectronic spectroscopy, scanning electron microscope and Brunauer–Emmett–Teller to analyze the effect of NTP on surface character of the catalyst samples. Second, NTP was combined with woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts to form in‐plasma catalysis purification (IPCP) systems. Finally, the four‐way purification performance of perovskite‐type catalysts were evaluated in the presence and absence of the plasma by simulation test bench. The results showed that NTP can enhance the four‐way purification performance for PM, NOx, CO and HC emitted by automobile exhausts over woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts. NTP can increase the specific surface area and porosity. When the input voltage, frequency and filling rate of IPCP systems are 15 kV, 15 Hz and 0.3, respectively, the maximum purification efficiency for PM, NOx, CO and HC are about 96%, 95%, 95%, and 84%. Moreover, four‐way purification mechanism of IPCP was deduced according to the experimental results.

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“…The doped A or B site with other cations can rationally tune the physicochemical characteristics of perovskites, including redox performance, oxygen mobility, and ionic conductivity [17]. A large number of studies showed that the catalytic activity of perovskite was comparable to that of noble metal catalysts [18,19]. Therefore, new non-precious metal-doped perovskite-type catalysts can be developed.…”

Section: Introductionmentioning

confidence: 99%

Study of Ce, Ca, Fe, and Mn-Doped LaCoO3 Perovskite Oxide for the Four-Way Purification of PM, NOx, CO, and HC from Diesel Engine Exhaust

Wang

Guo

et al. 2022

Materials

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Perovskite-type catalysts were widely used in the field of automobile exhaust purification due to their inherent physicochemical properties and excellent doping characteristics. A series of La1-xMxCo1-yNyO3 (M=Ce, Ca; N=Fe, Mn) perovskite-type catalyst samples were prepared by sol-gel method for the four-way purification of PM, NOx, CO, and HC emitted by diesel exhaust. The activity of catalyst samples was tested by simulation experiments and hydrogen temperature-programmed reduction (H2-TPR). Catalyst samples were characterized by means of XRD, FT-IR, SEM, BET, and XPS analysis. The results demonstrated that the perovskite-type catalyst samples with a particle pore size of 3–5 μm can be prepared by sol-gel method. When A-site of LaCoO3 perovskite-type oxide was doped by cerium ions, the catalyst samples produced small distortion. The doping of cerium ions to A-site was more conducive to the four-way purification of diesel exhaust than calcium ions. La0.8Ce0.2CoO3 perovskite-type samples showed the best purification efficiency, and the purification efficiencies of PM, NOx, CO, and HC were 90%, 85%, 94%, and 100%, respectively. When the B-site of La0.8Ce0.2CoO3 perovskite was doped with iron ions, the purification efficiency of catalyst samples for PM and NOx can be further enhanced. When the B-site of La0.8Ce0.2CoO3 perovskite was doped with manganese ions, the purification efficiency of the catalyst samples for PM can be further enhanced. It can be seen from the simulation experiments that La0.8Ce0.2Co0.7Fe0.3O3 perovskite was the best doping amount, and the purification efficiencies of PM, NOx, CO, and HC were 95%, 92%, 94%, and 100%, respectively.

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Electrospun La0.8Ce0.2Fe1-xNixO3 perovskite nanofibrous catalysts for CO oxidation

Cited by 9 publications

References 46 publications

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

Four‐way purification of automobile exhaust over woody La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts enhanced by NTP

Study of Ce, Ca, Fe, and Mn-Doped LaCoO3 Perovskite Oxide for the Four-Way Purification of PM, NOx, CO, and HC from Diesel Engine Exhaust

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Electrospun La0.8Ce0.2Fe1-xNixO3 perovskite nanofibrous catalysts for CO oxidation

Cited by 9 publications

References 46 publications

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO2–La2O3 Catalyst for Efficient Dry Reforming of Methane

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO2–La2O3 Catalyst for Efficient Dry Reforming of Methane

Four‐way purification of automobile exhaust over woody La0.8Ce0.2Fe0.3Co0.7O3 perovskite‐type catalysts enhanced by NTP

Study of Ce, Ca, Fe, and Mn-Doped LaCoO3 Perovskite Oxide for the Four-Way Purification of PM, NOx, CO, and HC from Diesel Engine Exhaust

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Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

Synergistic Syngas Production: Needleless Electrospinning Synthesis of Co/CeO₂–La₂O₃ Catalyst for Efficient Dry Reforming of Methane

Four‐way purification of automobile exhaust over woody La_0.8Ce_0.2Fe_0.3Co_0.7O₃ perovskite‐type catalysts enhanced by NTP