Influence of Sn content on the electrocatalytic activity of NiSn alloy nanoparticles-incorporated carbon nanofibers toward methanol oxidation

Barakat, Nasser A.M.; Al‐Mubaddel, Fahad S.; Karim, Mohammad Rezaul; Alrashed, Maher M.; Kim, Hee Young

doi:10.1016/j.ijhydene.2018.09.196

Cited by 26 publications

(17 citation statements)

References 47 publications

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“…24 With good solubility, the tin−nickel alloy has a wide range of compositions (such as Ni 3 Sn, Ni 3 Sn 2 , and Ni 3 Sn 4 ), whose formation can adjust the electronic configuration of the Ni and MgAlO support, leading to significant impact on the catalytic activity in Guerbet coupling of ethanol. 25 Herein, the NiSn/MgAlO catalyst with excellent hydrothermal stability was synthesized by coprecipitation and anion exchange method for aqueous ethanol upgrading to higher alcohols. The ethanol conversion of 66.9% and C4+ higher alcohols yield of 48.4% were obtained.…”

Section: ■ Introductionmentioning

confidence: 99%

Upgrading of Aqueous Bioethanol to Higher Alcohols over NiSn/MgAlO Catalyst

Cai

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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The calorific value and cetane number of C4+ long-chain higher alcohols are similar to those of diesel, blending with which can significantly reduce pollutant emissions from diesel engines. Direct upgrading of aqueous bioethanol derived from the biomass fermentation to higher alcohols faces the challenge of efficient catalysts with excellent catalytic activity and hydrothermal stability. Herein, NiSn/MgAlO catalysts prepared by loading Ni and Sn into hydrotalcite through coprecipitation and ion exchange methods were developed. Higher alcohols with a yield of 48.4 C-mol % and selectivity of 93.8% were obtained by upgrading of aqueous ethanol under hydrothermal conditions. NiSn/MgAlO catalysts exhibited excellent stability even after four recycle runs. The experiment results and catalyst characterizations revealed that the Ni(Mg)O solid solution formed by calcination of Ni(Mg)Al hydrotalcite promotes the dispersion and stability of Ni particles. Moreover, the high-valence Sn regulates the electronic structure and coordination environment of Ni (ratio of Ni0, Ni2+, Niδ+, and Ni–Sn alloys), both of which give the synergistic effect for the formation of C4+ long chain higher alcohols by selectively regulating the ethanol coupling reaction.

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Section: ■ Introductionmentioning

confidence: 99%

Upgrading of Aqueous Bioethanol to Higher Alcohols over NiSn/MgAlO Catalyst

Cai

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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“…Moreover, tin can decrease the poisoning of Pt by CO by providing an oxygen group on its surface [40]. With nickel, NiSn bimetallic nanoparticle-immobilized titanium and carbon nanofiber supports were introduced as electrode materials for methanol and urea electrooxidation [20,41,42]. Moreover, NiSn discrete nanoparticles have been reported as a stable electro catalyst for methanol oxidation [43].…”

Section: Introductionmentioning

confidence: 99%

Influence of Sn Content, Nanostructural Morphology, and Synthesis Temperature on the Electrochemical Active Area of Ni-Sn/C Nanocomposite: Verification of Methanol and Urea Electrooxidation

2019

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In contrast to precious metals (e.g., Pt), which possess their electro catalytic activities due to their surface electronic structure, the activity of the Ni-based electrocatalysts depends on formation of an electroactive surface area (ESA) from the oxyhydroxide layer (NiOOH). In this study, the influences of Sn content, nanostructural morphology, and synthesis temperature on the ESA of Sn-incorporated Ni/C nanostructures were studied. To investigate the effect of the nanostructural, Sn-incorporated Ni/C nanostructures, nanofibers were synthesized by electrospinning a tin chloride/nickel acetate/poly (vinyl alcohol) solution, followed by calcination under inert atmosphere at high temperatures (700, 850, and 1000 °C). On the other hand, the same composite was formulated in nanoparticulate form by a sol-gel procedure. The electrochemical measurements indicated that the nanofibrous morphology strongly enhanced formation of the ESA. Investigation of the tin content concluded that the optimum co-catalyst content depends on the synthesis temperature. Typically, the maximum ESA was observed at 10 and 15 wt % of the co-catalyst for the nanofibers prepared at 700 and 850 °C, respectively. Study of the effect of synthesis temperature concluded that at the same tin content, 850 °C calcination temperature reveals the best activity compared to 700 and 1000 °C. Practical verification was achieved by investigation of the electrocatalytic activity toward methanol and urea oxidation. The results confirmed that the activity is directly proportionate to the ESA, especially in the case of urea oxidation. Moreover, beside the distinct increase in the current density, at the optimum calcination temperature and co-catalyst content, a distinguished decrease in the onset potential of both urea and methanol oxidation was observed.

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“…[93] It was known that Ni-based electrodes had good MOR properties, and electrochemical MOR of NiO/MWCNT (MWCNT: multi-wall carbon nanotubes) had been found. Barakat et al [94] found that the activity for MOR depended on the Ti content and the calcination temperature, using the synergistic effect of the cocatalyst and/or by alloying Ni with Sn in an electrospinning solution, and tin chloride content must be 10 wt. % at 850°C, the capability was great.…”

Section: Ni-based Catalystsmentioning

confidence: 99%

Research Progress on Catalysts for the Electrocatalytic Oxidation of Methanol

Ding

Dong

Tang³

2020

ChemistrySelect

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The methanol oxidation reaction has high energy density and the product is non-toxic and harmless (CO 2 , H 2 O), making it become one of the targets of new fuel energy. To maximize the efficiency of the reaction, its key lies in the development of highly efficient catalysts. In this paper, we reviewed the types of methanol electrocatalytic oxidation catalysts in recent years, some new preparation methods, and the reaction mechanism of different types of catalyst systems, and discussed their structure-activity relationships, laying the foundation for the development of highly efficient new catalysts in the future. And this paper is included on the types of catalysts (Pt-based catalyst, Ni-based catalyst, and other transition metal-based catalyst) and preparation methods (Reduction method, sol-gel method, in-situ method), and discussed the catalytic mechanism which mainly starts from two aspects, one is adsorptiondesorption, the other is the bond between the catalyst, methanol, and the medium. Finally, the future challenges and opportunities of the electrocatalytic oxidation of methanol are discussed.

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Influence of Sn content on the electrocatalytic activity of NiSn alloy nanoparticles-incorporated carbon nanofibers toward methanol oxidation

Cited by 26 publications

References 47 publications

Upgrading of Aqueous Bioethanol to Higher Alcohols over NiSn/MgAlO Catalyst

Upgrading of Aqueous Bioethanol to Higher Alcohols over NiSn/MgAlO Catalyst

Influence of Sn Content, Nanostructural Morphology, and Synthesis Temperature on the Electrochemical Active Area of Ni-Sn/C Nanocomposite: Verification of Methanol and Urea Electrooxidation

Research Progress on Catalysts for the Electrocatalytic Oxidation of Methanol

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