Synthesis, characterization and performance of a novel Ni–Co/GO-TiO2 for electrooxidation of methanol and ethanol

Roodbari, Niloufar Jamshidi; Omrani, Abdollah; Hosseini, Sayed Reza

doi:10.1016/j.ijhydene.2021.11.224

Cited by 17 publications

(2 citation statements)

References 86 publications

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“…TiO 2 can be used in many areas due to its low cost, non-toxic, thermally stable, and corrosion resistance. [21,22] Experiments have shown that the use of TiO 2 can increase the activity and stability of the catalyst. [23][24][25][26][27] It is also known that precious materials such as Pt are frequently used in fuel cell studies.…”

Section: Doi: 101002/ente202301063mentioning

confidence: 99%

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Bayat,

Akin,

Bekmezci

et al. 2024

Energy Tech

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In this study, Pd@TiO2 nanostructure is formed by using TiO2 fibers obtained by the electrospinning method and chemical reduction method, and this nanostructure is used in C2, and C3 alcohol oxidation studies as an application. In addition, TiO2 is compared with the Pd catalyst to investigate the effect of TiO2. In the results obtained, peak current values of 193 and 66.7 mA cm−2 for ethanol oxidation and 127.38 and 36.18 mA cm−2 for 2‐propanol oxidation are observed for Pd@TiO2 and Pd catalysts, respectively. With the addition of TiO2 to the structure, the electrocatalytic activity of C2 and C3 alcohol oxidations increases 3–3.5 times and contributes to the onset potential at an earlier potential. It also shows higher durability and stability in long‐term tests. Moreover, the addition of TiO2 to the structure enhances the electrocatalytic activity and provides high current density and long‐term stability in alcohol oxidation. These results show that fibrous structures in combination with metals improve the effect of catalysts and exhibit high potential for their application in alcohol fuel cells.

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Section: Doi: 101002/ente202301063mentioning

confidence: 99%

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Bayat,

Akin,

Bekmezci

et al. 2024

Energy Tech

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“…Ni, Mn, Co, Cu, Pb, Cd, etc. have effective electronic structures and stabilities can be considered as effective catalysts. , Many studies have used non-noble metals such as Ni-Co, , Ni-Mn, Ni-Cu, NiCu 2 O 4 , Ni-Co-Zn, and Co-Ni-Mo to reduce the costs and to improve the catalytic performances in different electrooxidation reactions . It is believed that mixed valences/states of transition metals and transition metal oxides, owing to synergistic impacts of unique electronic structures, can enhance ion transportation and hence electrocatalytic performance. , …”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Electrochemical Performance of rGO-MWCNT/Mn-Co-Cu Nanohybrid as Novel Catalyst for Methanol Electrooxidation

2023

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The design of new electrocatalysts based on transition metals for direct alcohol fuel cells can lead to the wide application of these renewable energy sources by reducing costs and improving stability. Here, we report a hydrothermal method to modify graphene oxide (GO) by the addition of multiwalled carbon nanotubes (MWCNTs) to prepare reduced GO (rGO)-MWCNT as a support material for direct methanol fuel cells. Oxid composites based on Mn, Co, and Cu are synthesized and placed on the surface of the support material through a hydrothermal method. Structural and textural characteristics of bimetallic and trimetallic nanohybrids are examined. Modified carbon paste electrodes are used to study the electrochemical performance of nanohybrids toward methanol electrooxidation in an alkaline medium. The modified support material shows higher surface area and porosity compared to GO, which increased the amount of loading without agglomeration of metallic particles. The current density obtained by rGO-MWCNT/Mn-Co-Cu is higher compared to bimetallic catalysts with the same support material, which confirms the synergistic effect of using these metals together. This nanohybrid preserves 91.40% and 83.01% of the initial current density after 500 and 1000 cycles of cyclic voltammetry, respectively. The high stability and durability of rGO-MWCNT/Mn-Co-Cu confirm that this transition metal-based nanohybrid can be effectively used as an electrocatalyst for methanol electrooxidation in an alkaline medium.

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Synthesis and study of enhanced electrochemical properties of NiO nanoparticles deposited on TiO₂ nanotubes

Jamil

Awad

Al-Maydama

et al. 2022

Applied Organom Chemis

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In this work, TiO2 nanotubes were synthesized electrochemically by anodization of pure Ti sheet in 0.5% HF and annealed in N2 atmosphere to obtain (TiO2 NTs‐N2) and then the nickel was deposited on the support TiO2 NTs by immersing TiO2 NTs in mesoporous sol–gel template Ni nanoparticles method for overnight and then annealed in N2 atmosphere to obtain the electrocatalyst NiO NPs/TiO2 NTs‐N2. The physicochemical characterizations of NiO NPs/TiO2 NTs‐N2 were performed by scanning electron microscopy (SEM) and X‐ray diffraction (XRD) analysis. The catalyst NiO NPs/TiO2 NTs‐N2 was electrochemically characterized in a basic solution of methanol by cyclic voltammetry (CV) measurement. XRD characterization indicates the presence of nickel oxide nanoparticles with a diameter less than 43 nm and regularly combined into TiO2 nanotubes. NiO NPs/TiO2 NTs‐N2 catalyst exhibited a remarkably high electrocatalytic activity and has high electrocatalytic stability for methanol electrocatalytic oxidation reaction. The electrochemical studies showed that NiO NPs/TiO2 NTs‐N2 in alcoholic basic solution exhibited higher catalytic activity and stronger poisoning tolerance for methanol oxidation than that in nonalcoholic basic solution. This suggests that the NiO NPs catalyst supported on TiO2 NTs‐N2 has promising potential applications in electrocatalyst reactions. Nickel oxide supported on the conductive support TiO2 NTs‐N2 is used as an electrocatalyst in alkaline fuel cells. Results showed the best improvement in the physico‐chemical properties of these catalysts in comparison with previous studies.

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Synthesis, characterization and performance of a novel Ni–Co/GO-TiO2 for electrooxidation of methanol and ethanol

Cited by 17 publications

References 86 publications

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Synthesis, Characterization, and Electrochemical Performance of rGO-MWCNT/Mn-Co-Cu Nanohybrid as Novel Catalyst for Methanol Electrooxidation

Synthesis and study of enhanced electrochemical properties of NiO nanoparticles deposited on TiO₂ nanotubes

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Synthesis, characterization and performance of a novel Ni–Co/GO-TiO2 for electrooxidation of methanol and ethanol

Cited by 17 publications

References 86 publications

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Synthesis, Characterization, and Electrochemical Performance of rGO-MWCNT/Mn-Co-Cu Nanohybrid as Novel Catalyst for Methanol Electrooxidation

Synthesis and study of enhanced electrochemical properties of NiO nanoparticles deposited on TiO2 nanotubes

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Synthesis and study of enhanced electrochemical properties of NiO nanoparticles deposited on TiO₂ nanotubes