ZSM-5 Zeolite Support for PtAu Toward Ethanol Oxidation

Xu, Mengmeng; Lei, Shuangshuang; Dong, Rulin; Jin, Changchun

doi:10.1149/1945-7111/abfd76

Cited by 4 publications

(5 citation statements)

References 46 publications

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“…Molecular sieve is a natural zeolite or synthetic aluminosilicate, which has the functions of sieving molecules, adsorption, ion exchange, and catalysis; it is mainly composed of silicon, oxygen, aluminum, and other metal cations, and it has high thermal stability and chemical stability [10,11]. Since the 1970s, a large number of artificial zeolite molecular sieves have been synthesized; because of their unique channel zeolite molecular sieves, they have become indispensable catalytic materials and adsorption materials in petrochemical and fine chemicals and are used in more and more fields.…”

Section: Literature Reviewmentioning

confidence: 99%

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

Zhang

2022

Journal of Chemistry

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In order to improve the adsorption performance of molecular sieve honeycomb ceramics for VOCs, the author proposes a research method for the adsorption performance of VOCs based on the honeycomb ceramics loaded with molecular sieves. The method prepared cordierite honeycomb ceramic-supported HY, Na Y, USY, ZSM-5-300, and ZSM-5-360 monolithic adsorption materials by the coating method. Using toluene, ethyl acetate, isopropanol, and acetone as adsorbates, the adsorption properties of single-component and mixed-component organic compounds on the supported molecular sieve honeycomb ceramics were investigated. The result shows ZSM-5-300 has the largest adsorption capacity for the four adsorbates, which are toluene 68.0 mg/g, ethyl acetate 118.7 mg/g, isopropanol 70.9 mg/g, and acetone 72.5 mg/g. The test results show that ZSM-5-300 molecular sieve has high saturated adsorption capacity and is an ideal VOCs adsorption material.

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Section: Literature Reviewmentioning

confidence: 99%

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

Zhang

2022

Journal of Chemistry

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“…Ni(OH) 2 plays a pivotal role, as it has the capability to dissociate the H 2 O molecules to form metal hydroxide (M-OH ad ) that further oxidizes the intermediates CO ad to CO 2 . Also, the Ni(OH) 2 species have a characteristic property to get oxidized into NiOOH, that is, to Ni 3+ , and promote the electron transfer during methanol oxidation reaction (MOR). , Very recent studies have also mentioned that the support that is used for loading of such active metal nanocatalysts also helped in lowering the CO poisoning. − In this regard, zeolites or such aluminosilicates are found to be suitable, as they can improve the CO tolerance ability and provide good stability and high mass transport. ,, Different workers have used different types of zeolite as well as different metals to understand the role of zeolites in improving the electrochemical performance of the electrocatalyst. ,, From our investigation also, it was found that zeolite combined with multiwalled carbon nanotubes can improve the CO tolerance ability and provide good current density and low onset potential. ,,, Intrigued by the problems associated with alcohol fuel cells and the advantages associated with zeolite-based electrocatalyst herein, we tried to develop a non-Pt or Pd-based electrocatalyst comprising zeolite–rGO-supported Ni and Rh that can dissociate both CH 3 OH and C 2 H 5 OH into CO 2 and water in alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Hoque

Baruah

Biman

et al. 2022

ACS Appl. Energy Mater.

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Two hybrid electrocatalysts formulated as Rh/RhO x -Ni(OH)2-rGO and Rh/RhO x -Ni(OH)2-Y/rGO were synthesized using zeolite-Y and reduced graphene oxide (rGO) as solid support and hard templating agents. The hybrid composites served as effective electrocatalysts for the electrochemical oxidation of both methanol and ethanol. X-ray photoelectron spectroscopic analysis predicted for the creation of metallic rhodium, Rh(0), sites that helped in reducing the CO poisoning during electrocatalytic decomposition of the C1 and C2 alcohols. The zeolite-Y-embedded electrocatalyst, Rh/RhO x -Ni(OH)2-Y/rGO, showed high CO tolerance in comparison to Rh/RhO x -Ni(OH)2-rGO and Pt/C. This was further evident from the CO stripping experiment. The zeolite-Y matrix was found to have significant impact in enhancing the current density and durability of the electrocatalysts in both methanol and ethanol oxidation reaction (MOR and EOR) by stabilizing the low valent Rh species. The maximum current density in the case of MOR was found to be 5.6 A/mg, while that in the case of EOR was found to be 7.1 A/mg. The zeolite-Y-supported electrocatalyst exhibited stability up to 1000 cycles, which was retained for 13.8 h during MOR/EOR without any significant loss in the current density. The creation of mesoporous channels in zeolite-Y after its post-modification helped in high mass transfer and allowed to follow a diffusion-controlled mechanism. The linear relationship between current density and the square root of the scan rate also suggested a diffusion-controlled process. The catalysts also exhibited good methanol and ethanol tolerance with the maximum concentration up to 4 and 3 M, respectively.

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“…As we all know, the properties of zeolite have a great relationship with a silicon-to-aluminum ratio. A low silicon-to-aluminum ratio, that is high aluminum content, means that zeolites have higher acidity and high ion-exchange capacity . In the full spectrum, the characteristic peaks of O 1s, Si 2p, and Si 2s with more zeolite contents can be clearly found.…”

Section: Resultsmentioning

confidence: 96%

“…A low silicon-to-aluminum ratio, that is high aluminum content, means that zeolites have higher acidity and high ion-exchange capacity. 32 In the full spectrum, the characteristic peaks of O 1s, Si 2p, and Si 2s with more zeolite contents can be clearly found. In Figure 4a, there are Fe 2p 3/2 and Fe 2p 1/2 characteristic peaks in the high-resolution image, and the characteristic peaks of Fe 2p 3/2 are also separated.…”

Section: ■ Experimental Sectionmentioning

confidence: 88%

Improvement of Aromatics Selectivity from Catalytic Pyrolysis of Low-Density Polyethylene with Metal-Modified HZSM-5 in a CO₂ Atmosphere

Zhou

Pan

Zhang

2022

Ind. Eng. Chem. Res.

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Catalytic pyrolysis has been emerging as a promising strategy to tackle solid pollution induced by waste plastics, whereas achieving high selectivity of targeted products like valuable light aromatics remains a huge challenge. In this work, a novel protocol that combing waste plastic conversion and greenhouse gas CO 2 utilization was proposed for the first time. Different metal (Fe, Ni, Co, Mn, Ag, and Cu)-modified HZSM-5 zeolites were fabricated and then used as catalysts for the catalytic pyrolysis of low-density polyethylene (LDPE) with CO 2 as the reaction atmosphere. The introduction of CO 2 enhanced the selectivity of aromatic hydrocarbons from LDPE catalytic pyrolysis in comparison with a N 2 atmosphere, and a high liquid yield of more than 70% containing aromatic hydrocarbons, alkanes, and olefins was obtained with CO 2 catalytic conversion to CO over a nickel-modified HZSM-5 catalyst. In addition, the total selectivity of aromatics was 56.82% with that of benzene, toluene, ethylbenzene, and xylene (BTEX) being 43.63% at 550 °C. Compared with untreated HZSM-5, the metal-modified HZSM-5 catalyst also enhanced anticoking performance during catalytic reactions with the assistance of active CO 2 molecules. Besides, the involved catalytic reaction mechanism was also interpreted. The current work may offer a fresh route to the chemical recycling of waste plastics with simultaneous green CO 2 reutilization, advancing the development of catalytic conversion of hydrogen-rich solid waste into value-added products.

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ZSM-5 Zeolite Support for PtAu Toward Ethanol Oxidation

Cited by 4 publications

References 46 publications

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Improvement of Aromatics Selectivity from Catalytic Pyrolysis of Low-Density Polyethylene with Metal-Modified HZSM-5 in a CO₂ Atmosphere

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ZSM-5 Zeolite Support for PtAu Toward Ethanol Oxidation

Cited by 4 publications

References 46 publications

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

The Adsorption of VOCs by Honeycomb Ceramics Loaded with Molecular Sieves

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Improvement of Aromatics Selectivity from Catalytic Pyrolysis of Low-Density Polyethylene with Metal-Modified HZSM-5 in a CO2 Atmosphere

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Improvement of Aromatics Selectivity from Catalytic Pyrolysis of Low-Density Polyethylene with Metal-Modified HZSM-5 in a CO₂ Atmosphere