Highly efficient methanol oxidation reaction on durable Co9S8 @N, S-doped CNT catalyst for methanol fuel cell applications

Ashok, Anchu; Kumar, Anand; Yuda, Afdhal; Ashraf, Abdullah Al

doi:10.1016/j.ijhydene.2021.07.026

Cited by 22 publications

(10 citation statements)

References 74 publications

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“…The molar ratios of the metal precursors in Ag‐M samples were maintained at 1:1. Addition of glycine fuel to the mixture was determined based on a glycine to oxidizer ratio ( ϕ ) as formulated in literatures 31,32,38,41,42 . In the three electrocatalyst samples the reactant ratios (Ag: co‐metal: glycine [ ϕ ]) were 1:1:1.5 for both AgNi/C and AgCo/C samples, and 1:0:1.5 for Ag/C.…”

Section: Methodsmentioning

confidence: 99%

“…Addition of glycine fuel to the mixture was determined based on a glycine to oxidizer ratio (ϕ) as formulated in literatures. 31,32,38,41,42 In the three electrocatalyst samples the reactant ratios (Ag: co-metal: glycine [ϕ]) were 1:1:1.5 for both AgNi/C and AgCo/C samples, and 1:0:1.5 for Ag/C. Afterwards, 40 wt.% of the synthesized catalyst powder was added to 60 wt.% carbon support material to obtain the carbon supported electrocatalysts.…”

Section: Synthesismentioning

confidence: 99%

“…31 Ashok et al reported the synthesis of cobalt-based electrocatalyst for MOR in alkaline medium in the form of hierarchical Co 9 S 8 nanowires trapped in nitrogen-doped carbon nanotubes (N,S-Co@CNT) attained from melamine. 38 They performed material characterization which established that adding sulfur during pyrolysis improved the surface area, lattice defect, and pore size. Furthermore, morphology changes from hemispherical particles to nanowires was observed, that further enhanced the electrochemical characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, through cobalt addition, more efficient initiation of methanol dehydrogenation could take place that results in a relatively better catalytic performance toward MOR in comparison to using platinum alone 31 . Ashok et al reported the synthesis of cobalt‐based electrocatalyst for MOR in alkaline medium in the form of hierarchical Co 9 S 8 nanowires trapped in nitrogen‐doped carbon nanotubes (N,S‐Co@CNT) attained from melamine 38 . They performed material characterization which established that adding sulfur during pyrolysis improved the surface area, lattice defect, and pore size.…”

Section: Introductionmentioning

confidence: 99%

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Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Yuda

Kumar

Reesh

et al. 2022

Intl J of Energy Research

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Herein, we report the synthesis of silver-based electrocatalysts (Ag/C, AgCo/C, and AgNi/C) using solution combustion method and their performance towards methanol oxidation reaction. Detailed structural and microscopic analysis confirmed the formation of graphitic carbon, synthesis of crystalline phases with high porosity in all the three electrocatalysts. X-ray photoelectron spectroscopic (XPS) analysis showed a high concentration of Ag 2 O (or Ag + ) on AgNi/C, whereas AgCo/C exhibited a high concentration AgO (or Ag 2+ ) on the surface. XPS analysis on C 1s confirmed the highest concentrations of the sp 2 hybridized

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Section: Methodsmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Yuda

Kumar

Reesh

et al. 2022

Intl J of Energy Research

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“…produce carbon dioxide [11][12][13][14]. The electrooxidation process occurs on the anode and follows the below equation:…”

Section: Introductionmentioning

confidence: 99%

Highly Active Lanthanum Perovskite Electrocatalysts (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) by Tuning the Mn:Co Ratio for ORR and MOR in Alkaline Medium

et al. 2022

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Lanthanum-based perovskites (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) were synthesized using a solution combustion synthesis technique with variable ratios of Co and Mn to investigate the surface property and electrocatalytic characteristics (stability and activity of catalyst) for methanol oxidation reaction (MOR), oxygen reduction reaction (ORR), and oxygen evolution reaction (OER) under alkaline medium (KOH). The structural, chemical, and morphological characterizations of the synthesized catalyst were performed by XRD, FTIR, SEM, TEM, and XPS techniques as a function of the Mn:Co elemental ratio. The time–temperature profile during the combustion process was also monitored to study the completion of the combustion reaction and to understand its impact on the structure of the perovskites. SEM/EDX and XPS analysis confirmed the formation of the targeted ratio of Mn and Co on the catalyst. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) results revealed that all perovskite samples with different Co:Mn ratios were active for ORR, OER, and MOR. The LaMnxCo1-xO3 perovskite with x = 0.4 showed the highest current density compared to the other samples toward all the electrocatalytic reactions under alkaline reaction conditions. Graphical Abstract

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Progress of g‐C ₃ N ₄ and carbon‐based material composite in fuel cell application

Harun

Shaari

Ramli

2022

Intl J of Energy Research

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Fuel cells are the most promising alternative green and clean energy source in the future because of their low carbon emissions. Fuel cells have been employed in various applications, including large-scale stationary power generation, distributed combination heat and power, transport, and mobile and stationary applications. Generally, a fuel cell system consists of a proton exchange membrane or polymer electrolyte membrane (PEM), a catalyst layer, a microporous layer, a gas diffusion layer, and a bipolar plate at the anode and cathode. PEMs are an important component in fuel cell applications that act as proton carriers and separators for the anode and cathode, while catalyst support materials are a major component of proton exchange membrane fuel cell. The membrane and catalyst affect the cost, durability, and electrochemical activity of fuel cells. Researchers have made serious attempts to develop materials that can reduce the cost of membrane and catalyst manufacturing, lowering the overall cost of fuel cells. Because of its unique features like 2D structure, ease of fabrication, and low production cost, graphitic carbon nitride (g-CN or g-C 3 N 4 ) is now frequently mentioned.Due to their exceptional qualities, carbon-based materials are also commonly used in a variety of applications, including fuel cells. The effectiveness of experiments using g-C 3 N 4 , carbon nanotube (CNT), and graphene as essential materials in enhancing fuel cell performance is discussed in this study. This review, primarily for fuel cell applications, discusses ways of adjusting the structure in terms of porosity, dimension tailoring, and atomic and edge functionalization. The study also involved the properties of composite materials as well as their respective applications on membranes as well as fuel cell catalysts. This review is useful for investigations into g-C 3 N 4 , CNT, and graphene because it offers ideas and direction for improving the potential of associated systems, including fuel cells, hydrogen production, solar cells, batteries, and supercapacitors.Abbreviations: CHP, combination heat and power; CNT, carbon nanotube; DMFC, direct methanol fuel cell; g-CN or g-C 3 N 4 , graphitic carbon nitride; MEA, membrane electrolyte assembly; ORR, oxygen reduction reaction; PEM, polymer electrolyte membrane; PEMFC, proton exchange membrane fuel cell; SPEEK, sulfonated poly (ether ether ketone).

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Highly efficient methanol oxidation reaction on durable Co9S8 @N, S-doped CNT catalyst for methanol fuel cell applications

Cited by 22 publications

References 74 publications

Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Highly Active Lanthanum Perovskite Electrocatalysts (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) by Tuning the Mn:Co Ratio for ORR and MOR in Alkaline Medium

Progress of g‐C ₃ N ₄ and carbon‐based material composite in fuel cell application

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Highly efficient methanol oxidation reaction on durable Co9S8 @N, S-doped CNT catalyst for methanol fuel cell applications

Cited by 22 publications

References 74 publications

Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Electrooxidation of methanol on Ag, AgNi, and AgCo catalysts prepared by combustion synthesis technique

Highly Active Lanthanum Perovskite Electrocatalysts (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) by Tuning the Mn:Co Ratio for ORR and MOR in Alkaline Medium

Progress of g‐C 3 N 4 and carbon‐based material composite in fuel cell application

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Progress of g‐C ₃ N ₄ and carbon‐based material composite in fuel cell application