High catalytic activity of magnetic FeO /NiO /SBA-15: The role of Ni in the bimetallic oxides at the nanometer level

Li, Xingfa; Liu, Weiping; Ma, Jianqing; Wen, Yuezhong; Wu, Zucheng

doi:10.1016/j.apcatb.2015.05.034

Cited by 62 publications

(25 citation statements)

References 41 publications

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“…SI.1), Fenton‐like reaction initiated by nickel is powerless since there is only a slight gap between

E_{Ni}^{0}

3+ /Ni 2+ (+1.74 V) and

E_{H 2 O 2 / H 2 O}^{0}

(+1.776 V), confirmed by phenomenon that no MO decolorization was obtained when Ni 2+ , H 2 O 2 , and MO were in the solution (data not show). The similar results also reported by Lee and Sedlak . Therefore, MO decolorization by FZVN is more likely to obey reduction mechanism, which transfers electron from FZVN or hydrogen to MO to decolorize the azo bond in dye.…”

Section: Resultssupporting

confidence: 88%

“…The commonly used ZVMs include zero‐valent iron (ZVI), zero‐valent aluminum (ZVAl), zero‐valent copper, zero‐valent zinc, especially ZVI and ZVAl . Due to the limited surface area of ZVI, inclusion of other metals, like Ni, Pt, Pd, or Ag, has been futher studied to enhance the reduction capability of ZVI . In addition to the direct electron transfer from ZVMs to contaminants, there is, however, growing evidence that catalyzed hydrogenolysis, or more generally hydrogenation involving the reaction of adsorbed or adsorbed atomic hydrogen on the metal surface, may also be an important reduction process in ZVM reduction situation.…”

Section: Introductionmentioning

confidence: 99%

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A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Deng

Yang

Zhu

et al. 2017

Env Prog and Sustain Energy

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In this article, foam zero‐valent nickel (FZVN) was put forward as a promising zero‐valent metal for the pretreatment of azo dye wastewater (MO as a model contaminant). The characteristics of FZVN were evaluated by methods of Barrett‐Emmett‐Teller, scanning electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. Moreover, influence of key experimental parameters, including oxygen concentration, presence of different acid, pH, and temperature on the MO decolorization were systematically ascertained. Furthermore, possible mechanism of MO removal by FZVN was investigated by using Liquid chromatography‐mass spectrometry (LC‐MS). Results showed that FZVN was a three‐dimensional pore material with a specific surface area of 3 m2 g−1. Moreover, anoxic condition, presence of acetic acid, higher temperatures and acid conditions were beneficial to decolorize MO by FZVN while the decolorization process obeyed the first order kinetic model with an apparent rate constant (kapp) of 0.162 min−1 at pH value of 4 (25°C). The activation energy Ea obtained from the decolorization reaction was 83.1 kJ mol−1. Based on LC‐MS results, the role of FZVN in the decolorization reaction process was suggested as follows: strong reductive, catalysis, and adsorption. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 686–694, 2018

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“…SI.1), Fenton‐like reaction initiated by nickel is powerless since there is only a slight gap between

E_{Ni}^{0}

3+ /Ni 2+ (+1.74 V) and

E_{H 2 O 2 / H 2 O}^{0}

Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

A rapid azo dye decolorization of methyl orange by the foam zero‐valent nickel

Deng

Yang

Zhu

et al. 2017

Env Prog and Sustain Energy

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“…For the bimetallic oxides, the Fe 2p peaks were shifted to higher binding energies, and this may be explained by an enhanced electron density of the Fe species due to the presence of nickel (Table 4) [3,22]. In the Ni 2p XPS spectra (not showed), even when a lot of noise was observed and, also, low intensities, two peaks located at ≈ 855 and 871.6 eV were detected, corresponding to Ni +2 from NiO and Ni +2 peaks at 857 and 873.4 eV from NiAl2O4 spinel structure, respectively [23].…”

Section: Resultsmentioning

confidence: 99%

“…Iron is known to be an active catalyst and a promoter in several catalytic reactions, such as the Fisher-Tropsch synthesis [1], the oxidation of CO [2], Fenton-type reactions [3] and the water gas shift reaction [4]. Among the attractive properties of the iron-based catalysts are their activity, low cost, and redox properties.…”

Section: Introductionmentioning

confidence: 99%

Allyl Alcohol Production by Conversion of Glycerol Over Supported Iron and Nickel Bimetallic Oxides

et al. 2020

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Abstract. The study of catalysts based on iron, nickel, and iron-nickel oxides (Fe, Ni and FeNi) supported on a commercial mesoporous alumina is presented. The metal oxides were synthesized by the incipient wetness impregnation method. The samples were characterized by XRD, TPR-H2, Raman spectroscopy, XPS and N2 adsorption. The catalytic activity was evaluated in the dehydration-dehydrogenation reaction of glycerol in the gas phase. In the iron oxide and nickel oxide catalysts, the result of TPR-H2 showed that the presence of nickel influences the reduction of iron species. In the reaction, the catalysts showed similar conversion. However, the selectivity of the bimetallic oxide catalysts is modified, and the production of allyl alcohol increases noticeably forming a greater amount allyl alcohol than that observed in the monometallic oxides, in which a greater amount of hydroxyacetone is formed. The results indicate that the redox pairs Fe+3/Fe+2 influence the selectivity of these oxides. A decrease in the ratio Fe+3/Fe+2 species favored the formation of allyl alcohol. Resumen. Se presenta el estudio de catalizadores basados en óxidos de hierro y níquel (Fe, Ni y FeNi) soportados en una alúmina mesoporosa comercial. Los óxidos metálicos se sintetizaron por el método de impregnación de humedad incipiente. Las muestras se caracterizaron por XRD, TPR-H2, espectroscopía Raman, XPS y adsorción de N2. La actividad catalítica se evaluó en la reacción de deshidratación-deshidrogenación de glicerol en la fase gaseosa. En los catalizadores de óxido de hierro y óxido de níquel, el resultado de TPR-H2 mostró que la presencia de níquel influye en la reducción de las especies de hierro. En la reacción, los catalizadores mostraron una conversión similar. Sin embargo, la selectividad en los catalizadores de óxidos bimetálicos se modifica formando una mayor cantidad de alcohol alílico que la observada en los óxidos monometálicos, donde se forma una mayor cantidad de hidroxiacetona. Los resultados obtenidos indican que los pares redox Fe+2/Fe+3 influyen en el comportamiento catalítico de estos óxidos, en la selectividad. Una disminución de la relación Fe+3/Fe+2 favorece la formación de alcohol alílico.

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“…Although the commercial ordered mesoporous silica (OMS) is proved to be an ideal supporting material in environment-and energy-related catalysis, the poor electrical conductivity limits its direct application in fuel cells. 53,54 Based on a silica template, mesoporous carbon materials were rst prepared in 1999, which had great scientic and technological importance as new electrode materials to be applied in fuel cells. 55 Present research studies are mostly concentrated on ordered mesoporous carbons (OMCs).…”

Section: Metals Supported On Mesoporous Materials (Msmms)mentioning

confidence: 99%