Design of Self-Supported Flexible Nanostars MFe-LDH@ Carbon Xerogel-Modified Electrode for Methanol Oxidation

Layered double hydroxides (LDHs) have emerged as promising electrodes materials for the methanol oxidation reaction. Here, we report on the preparation of different LDHs with the hydrothermal process. The effect of the divalent cation (i.e., Ni, Co, and Zn) on the electrochemical performance of methanol oxidation was investigated. Moreover, nanocomposites of LDHs and carbon xerogels (CX) supported on nickel foam (NF) substrate were prepared to investigate the role of carbon xerogel. The results show that NiFe-LDH/CX/NF is an efficient electrocatalyst for methanol oxidation with a current density that reaches 400 mA·m−2 compared to 250 and 90 mA·cm−2 for NiFe-LDH/NF and NF, respectively. In addition, all LDH/CX/NF nanocomposites show excellent stability for methanol oxidation. A clear relationship is observed between the electrodes crystallite size and their activity to methanol oxidation. The smaller the crystallite size, the higher the current density delivered. Additionally, the presence of carbon xerogel in the nanocomposites offer 3D interconnected micro/mesopores, which facilitate both mass and electron transport.

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The Electrolyte-Fuel Concentrations Effects on Direct Methanol Alkaline Fuel Cell (DMAFC) Through Non-Noble Metal Catalysts

Journal of Science and Application Technology ◽

10.35472/jsat.v5i1.388 ◽

2021 ◽

Vol 5 (1) ◽

pp. 25

Author(s):

Wika Atro Auriyani ◽

Djoni Bustan ◽

Sri Haryati

Keyword(s):

Fuel Cell ◽

Methanol Oxidation ◽

Current Density ◽

Potassium Hydroxide ◽

Oxidation Reaction ◽

Nickel Foam ◽

Methanol Oxidation Reaction ◽

Alkaline Fuel Cell ◽

Noble Metal Catalysts ◽

Direct Methanol

Most of the R&D on Direct Methanol Alkaline Fuel Cell (DMAFC) concentrates on electrode catalyst and appropriate electrolyte to improve the efficiency. Mostly, a Pt-based electrocatalyst was used. In this research, Nickel foam and membrane silver as non-noble metal catalysts were used in a square-shaped fuel cell stack of 15 x 15 cm in size. The ionic current in the Direct Methanol Alkaline Fuel Cell (DMAFC) was due to the conduction of hydroxide ions. Potassium hydroxide which plays an essential role in delivering hydroxide ions was used in this study. The electrolyte effect of potassium hydroxide was studied in different concentrations for the methanol oxidation reaction. Nickel foam and membrane silver were used for methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR). 1 M, 3 M, 5 M concentration of potassium hydroxide and 0.5 M, 1 M, 2 M, 3 M, 4 M, 5 M of methanol as a fuel have been conducted. The highest maximum power density of 543.35 mW/cm2 was obtained at 2,331 mA/cm2 of current density using the 5 M KOH and 0,5 M fuel. At equimolar concentration between fuel-electrolyte mixture give the higher current density.

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Galvanostatically Deposited Nickel Nanoparticles As Electrocatalyst for the Methanol Oxidation Reaction: Role of Deposition Current Density on Catalytic Activity

ECS Meeting Abstracts ◽

10.1149/ma2018-02/52/1791 ◽

2018 ◽

Keyword(s):

Catalytic Activity ◽

Methanol Oxidation ◽

Current Density ◽

Oxidation Reaction ◽

Nickel Nanoparticles ◽

Methanol Oxidation Reaction ◽

Deposition Current Density

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Surface oxygen-mediated ultrathin PtRuM (Ni, Fe, and Co) nanowires boosting methanol oxidation reaction

Journal of Materials Chemistry A ◽

10.1039/c9ta11745h ◽

2020 ◽

Vol 8 (5) ◽

pp. 2323-2330 ◽

Cited By ~ 12

Author(s):

Hongdong Li ◽

Yue Pan ◽

Dan Zhang ◽

Yi Han ◽

Zuochao Wang ◽

...

Keyword(s):

Methanol Oxidation ◽

Acidic Medium ◽

Oxidation Reaction ◽

Methanol Oxidation Reaction ◽

Surface Oxygen ◽

Mass Activity ◽

Co Nanowires ◽

Excellent Stability

The surface-oxygen-modified ultrathin Pt62Ru18Ni20–O/C nanowires catalyst exhibits outstanding mass activity, excellent stability, and CO anti-poisoning for methanol oxidation reaction in acidic medium by DFT and electrochemical experiments.

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The influencing role of oxophilicity and surface area of the catalyst for electrochemical methanol oxidation reaction: a case study

Materials Research Innovations ◽

10.1080/14328917.2018.1533268 ◽

2018 ◽

Vol 23 (7) ◽

pp. 440-447 ◽

Cited By ~ 4

Author(s):

Samarjeet Siwal ◽

Nishu Devi ◽

Venkata Perla ◽

Rasmita Barik ◽

Sarit Ghosh ◽

...

Keyword(s):

Surface Area ◽

Methanol Oxidation ◽

Oxidation Reaction ◽

Methanol Oxidation Reaction

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Activity of Carbon-Supported Platinum Nanoparticles toward Methanol Oxidation Reaction: Role of Metal Precursor and a New Surfactant,tert-Octanethiol

The Journal of Physical Chemistry C ◽

10.1021/jp065809y ◽

2007 ◽

Vol 111 (3) ◽

pp. 1467-1473 ◽

Cited By ~ 70

Author(s):

Fatih Şen ◽

Gülsün Gökaǧaç

Keyword(s):

Methanol Oxidation ◽

Platinum Nanoparticles ◽

Oxidation Reaction ◽

Methanol Oxidation Reaction ◽

Metal Precursor ◽

Supported Platinum

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A Hydrothermal Process for the Fabrication of Nickel Foam Based NiO and Co3O4 Nanostructures with Excellent Properties for Electrochemical Capacitors

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.786 ◽

2013 ◽

Vol 291-294 ◽

pp. 786-790

Author(s):

Ling Bin Kong ◽

Xiao Ming Li ◽

Mao Cheng Liu ◽

Xue Jing Ma ◽

Yong Chun Luo ◽

...

Keyword(s):

Electrochemical Performance ◽

Current Density ◽

Nickel Foam ◽

Hydrothermal Process ◽

Film Structure ◽

Proton Exchange ◽

Fast Proton ◽

Excellent Electrochemical Performance ◽

Highly Dispersed ◽

A Current

Unique NiO and Co3O4 nanostructures were successfully deposited on nickel foam (NF) substrate by a hydrothermal process. Both of them are highly dispersed on the surface of NF, showing a unique nanoporous film structure. They exhibit excellent electrochemical performance due to their effective porous structure which introducing facile electrolyte penetration and fast proton exchange. The highest specific capacitance of 231 and 493 F g-1 are achieved for NiO and Co3O4 electrodes at a current density of 0.5 A g-1, respectively.

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Facile solvothermal synthesis of Pt-Cu nanocatalyst with improved electrocatalytic activity toward methanol oxidation

Journal of the Serbian Chemical Society ◽

10.2298/jsc190131041m ◽

2019 ◽

Vol 84 (10) ◽

pp. 1155-1167

Author(s):

Muhammad Mehmood ◽

Muhammad Tariq ◽

Ayaz Hassan ◽

Abdul Raziq ◽

Abdur Rahim ◽

...

Keyword(s):

Methanol Oxidation ◽

Current Density ◽

Particle Surface ◽

Metal Catalyst ◽

Methanol Oxidation Reaction ◽

Peak Current Density ◽

Initial Current ◽

X Ray ◽

Binary Metal ◽

Transmission Electron

A binary metal nanocatalyst of platinum and copper was synthesized using a facile solvothermal process (polyol method). The synthesized catalyst was characterized using energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemical performance of the synthesized carbon supported binary metal catalyst, Pt?Cu/?, toward methanol oxidation reaction was checked and then compared with the commercial Pt/C (ETEK) catalyst, using cyclic voltammetry and chronoamperometric techniques. The Pt?Cu/C catalyst was found to be cubic in shape with indentations on the particle surface, having platinum to copper atomic composition of 4:1, i.e., (Pt4Cu). The peak current density for Pt?Cu/C catalyst recorded as 2.3 mA cm-2 at 0.7 V (vs Ag/AgCl) and 50 mV s-1, was two times higher than the current density of the commercially available Pt/C catalyst (1.16 mA cm-2 at 0.76 V). Moreover, the Pt?Cu/C catalyst was found to be more durable than the commercial Pt/C catalyst, as the Pt?Cu/C retained 89 % of its initial current density, while the commercial Pt/C catalyst retained 65 % of its initial current density after 300 potential cycles.

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Electrochemical activity of layered double hydroxides supported nano Pt clusters toward methanol oxidation reaction in alkaline solutions

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2020.03.072 ◽

2020 ◽

Vol 9 (3) ◽

pp. 5463-5473

Author(s):

Liang Li ◽

Ya Yang ◽

Yaowei Wang ◽

Manli Liang ◽

Yuanxing Huang

Keyword(s):

Methanol Oxidation ◽

Layered Double Hydroxides ◽

Oxidation Reaction ◽

Electrochemical Activity ◽

Alkaline Solutions ◽

Methanol Oxidation Reaction ◽

Double Hydroxides

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NiCo Nanoneedles on 3D Carbon Nanotubes/Carbon Foam Electrode as an Efficient Bi-Functional Catalyst for Electro-Oxidation of Water and Methanol

Catalysts ◽

10.3390/catal11040500 ◽

2021 ◽

Vol 11 (4) ◽

pp. 500

Author(s):

Tung Ngoc Pham ◽

Ajaikumar Samikannu ◽

Solomon Tesfalidet ◽

Thomas Wågberg ◽

Jyri-Pekka Mikkola

Keyword(s):

Carbon Nanotubes ◽

Methanol Oxidation ◽

Current Density ◽

Oxidation Reaction ◽

Direct Methanol Fuel Cells ◽

High Current Density ◽

Water Electrolysis ◽

Carbon Foam ◽

Methanol Oxidation Reaction ◽

Testing Time

In this study, we report a 3D structured carbon foam electrode assembled from a bi-functional NiCo catalyst, carbon nanotubes (CNT), and a monolith 3D structured carbon foam (CF) as a highly active and stable electrode for oxygen evolution reaction (OER) and methanol oxidation reaction (MOR). When the NiCo@CNTs/CF electrode was used as an anode in OER, after the anodization step, the electrode required a small overpotential of 320 mV to reach the current density of 10 mA cm−2 and demonstrated excellent stability over a long testing time (total 30 h) in 1 M KOH. The as-prepared NiCo@CNTs/CF electrode also exhibited a good performance towards methanol oxidation reaction (MOR) with high current density, 100 mA cm−2 at 0.6 V vs. Ag/AgCl, and good stability in 1 M KOH plus 0.5 M CH3OH electrolyte. The NiCo@CNTs/CF catalyst/electrode provides a potential for application as an anode in water electrolysis and direct methanol fuel cells.

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