Enhanced catalytic activity of α-Fe2O3 nanorods enclosed with {110} and {001} planes for methane combustion and CO oxidation

Gao, Qi-Xiu; Wang, Xiaofang; Di, Jie-Ling; Wu, Xin; Tao, Yong

doi:10.1039/c1cy00080b

Cited by 61 publications

(24 citation statements)

References 26 publications

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“…Figure 1 shows the morphologies of Fe 2 O 3 and Fe 2 O 3 -ZrO 2 catalysts in the SEM images. Pure Fe 2 O 3 with regular morphologies and sizes, involving nanoplates (HNPs), nanorods (HNRs), nanocubes (HNCs), and nanotubes (HNTs), was consistent with the literature [17,18]. Appropriate reagents (such as surfactant, additives, etc.)…”

Section: Introductionsupporting

confidence: 87%

Effect of Fe2O3–ZrO2 Catalyst Morphology on Sulfamethazine Degradation in the Fenton-Like Reaction

Gao

Hao

et al. 2019

Catalysts

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Fe2O3–ZrO2 catalysts with different morphologies (nanoplates (HZNPs), nanorods (HZNRs), nanocubes (HZNCs), and nanotubes (HZNTs)) were prepared by a hydrothermal method to investigate the effect of the morphology on the catalytic performance in the Fenton-like reaction for sulfamethazine (SMT) degradation. The Fe2O3–ZrO2 catalysts were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) analysis. The H2O2 adsorption and the Fe2+ density sites on the Fe2O3–ZrO2 catalysts had a close relationship with the morphologies and exhibited an important effect on the ·OH formation in the Fenton-like reaction. Free ·OH radicals were the main oxidative species in the reaction, and the normalized ·OH concentration per surface area of the catalysts was 4.52, 2.24, 2.20, and 0.37 μmol/m2 for HZNPs, HZNRs, HZNCs, and HZNTs, respectively. The Fe2O3–ZrO2 catalysts with different morphologies showed good catalytic performance, and the order of SMT degradation was HZNPs > HZNRs > HZNCs > HZNTs. Total SMT removal was achieved in the Fenton-like reaction over HZNPs at pH 3.0 and 45 °C after 240 min.

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Section: Introductionsupporting

confidence: 87%

Effect of Fe2O3–ZrO2 Catalyst Morphology on Sulfamethazine Degradation in the Fenton-Like Reaction

Gao

Hao

et al. 2019

Catalysts

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“…[102] a-Fe 2 O 3 shows an apparent shape-dependent phenomenoni nC Oo xidation,a nd the activity follows the order nanorods > nanoplates > nanocubes. [103][104][105] This is correlated with the reducibility of surface Fe 3 + sites, which favorst he formation of active oxygen species. The highera ctivity of a-Fe 2 O 3 nanorods has also been assigned to higher oxygen mobility.…”

Section: Fe 2 O 3 /Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

Shape Engineering of Oxide Nanoparticles for Heterogeneous Catalysis

Zhou

Shen

2016

Chemistry An Asian Journal

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The fabrication of oxide particles with tunable sizes and shapes at the nanoscale is one of the most crucial issues for the design and development of highly efficient heterogeneous catalysts. The shape of oxide nanoparticles has been demonstrated to affect their catalytic properties remarkably. Tuning the shape of oxide particles allows preferential exposure of specific reactive facets; this can maximize the number of active sites available to the reactants, which can improve the activity and also mediate the reaction route to a specific channel to achieve higher selectivity for a particular chemical reaction. In addition, the shape of the oxide particles affects their interaction with metal particles or clusters, and this involves interfacial strain and charge transfer. Metal particles or clusters dispersed on the reactive or polar facets of the oxide support often provide superior catalytic performance, primarily because of strong metal-support interactions. However, the geometric and electronic features of the metal-oxide interface may change during the course of the reaction, induced by chemisorption of reactive molecules at elevated temperatures, which should be taken into account in proposing a structure-reactivity relationship.

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“…Taking Fe 2 O 3 and Co 3 O 4 nanostructures with controlled morphology as an example, Fe 2 O 3 nanocrystals can be tuned to form nanorods, nanotubes, and nanocubes. The Fe 2 O 3 nanorods displayed the best performance of catalytic methane combustion [21]. The Fe 2 O 3 nanorods displayed the best performance of catalytic methane combustion [21].…”

Section: Nano-array Catalysts For Hydrocarbon Combustionmentioning

confidence: 99%

“…In addition to the bulk oxide, metal oxide nanostructures had demonstrated promising catalytic activity for low temperature hydrocarbon combustion [20,21]. Taking Fe 2 O 3 and Co 3 O 4 nanostructures with controlled morphology as an example, Fe 2 O 3 nanocrystals can be tuned to form nanorods, nanotubes, and nanocubes.…”

Section: Nano-array Catalysts For Hydrocarbon Combustionmentioning

confidence: 99%