Electrodeposition of CoxNiy Thin Film and Its Catalytic Activity for Ethanol Electrooxidation

Syafei, Hilman; Kurniawan, None Dwi Giwang

doi:10.56425/cma.v2i1.50

Cited by 5 publications

(6 citation statements)

References 20 publications

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“…A smaller particle size has affected ionic movement in the test because the distance it travels will be smaller, which will increase the movement of the ions. The smaller the Rct value, the greater the electrical conductivity, which causes the electron transfer kinetics and catalytic process to happen faster [30]. Upper potential variation consisting of Pt with EU 0.3 V, 0.5 V, 1.0 V, 1.25 V, and 1.50 V at EL -0.3 V produces an electric current of, respectively, 6.94 mA/cm 2 , 5.28 mA/ cm 2 , 8.82 mA/ cm 2 , 3.69 mA/ cm 2 , and 2.13 mA/ cm 2 .…”

Section: Resultsmentioning

confidence: 99%

Square-Wave Pulse Deposition of Pt Nanoparticles for Ethanol Electrooxidation

Syafei,

Syafei

2024

Chem. Mater.

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Platinum (Pt) is often used as an electrocatalyst in the electrooxidation of ethanol. There have been many attempts to improve the catalytic properties of platinum-based catalysts to achieve satisfactory results. The solutions are manipulating the size and shape of Pt. In this study, Pt will be deposited using the square wave pulse deposition method at upper potential variations. The Pt samples were characterized by scanning electron microscopy (SEM), X-ray diffraction, energy dispersive X-ray, and electrochemical impedance spectroscopy. The results of SEM show that the morphology of Pt at potentials of 0.3 V, 0.5 V, and 1.0 V produces a dendritic nanothorn morphology, while 1.25 V and 1.50 V produce a nanoleaf morphology. The lowest charge transfer resistance value is at Pt1.0V with the smallest size. The highest yield of ethanol electrooxidation was at Pt1.0V reaching 8.82 mA/cm2.

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Section: Resultsmentioning

confidence: 99%

Square-Wave Pulse Deposition of Pt Nanoparticles for Ethanol Electrooxidation

Syafei,

Syafei

2024

Chem. Mater.

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“…On the other hand, there are a very few reports on oxidation of ethanol using transition-metal-based catalysts . Bartolomeo and co-workers employed a ZrO 2 /NiO/rGO-based catalyst and were successful in obtaining a current density of 17.3 mA cm –2 along with the formation of acetic acid as the end product .…”

Section: Introductionmentioning

confidence: 99%

“…Using 3 d -based transition metals, − to date, majority of the research has focused on heterogeneous − (typically heterometallic) electrocatalysts, which also constitute the bulk of the working electrode while operating in tandem with Pt-based − counter electrodes. Considering the fact that the precursors for such systems are simple metal salts, it is imperative that one obtains a systematic and fundamental understanding of their activity in solution under homogeneous conditions while using a non-noble-based (say carbon-based) electrode assembly for alcohol electro-oxidation.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of Methanol and Ethanol with 3d-Metal Based Anodic Electrocatalysts in Alkaline Media Using Carbon Based Electrode Assembly

Tanwar,

Narjinari,

Sharma

et al. 2024

Inorg. Chem.

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Homogeneous electrocatalytic systems based on readily available, earth-abundant, inexpensive base metals Ni, Co, and Cr have been formulated for the electro-oxidation of alcohols (methanol and ethanol) that constitute a key half-cell component of direct alcohol fuel cells (DAFCs). Notably, excellent results were obtained for both methanol as well as ethanol electrooxidation while operating with a half-cell assembly based on allnon-noble working and counter electrode systems consisting of glassy carbon and graphite rod, respectively. Using NaOH as the supporting electrolyte, Ni/Co/Cr metal salts and their bis-(iminopyridine) complexes have been used as anodic electrocatalysts for the alcohol half-cell reactions, and among them, catalytic systems based on Co outperformed the corresponding systems based on Ni and Cr. The system comprising CoCl 2 .•6H 2 O [10 mM] + NaOH [6 M] at room temperature emerged as the best electrocatalyst for both methanol [5 M] electro-oxidation (ca. 522.5 ± 13.5 mA cm −2 at 1.4 V) and ethanol [5 M] electro-oxidation (ca. 209 ± 25 mA cm −2 at 1.34 V). It was observed that regardless of the starting alcohol, the end product is carbon dioxide, all of which gets trapped as sodium carbonate (up to 97% yield), thereby mitigating any possible hazards of greenhouse gas emission. Inferences obtained from FETEM, FESEM, and EDS analysis of both the electrolyte solution and residues deposited on the electrode surface provide evidence for the mostly homogeneous nature of the reaction mixture with the molecular catalyst being the major contributor toward the electrocatalytic activity apart from the minor role played by trace heterogeneous particles. The current cell assembly operating with non-noble working and counter electrodes utilizing a catalytic system based on an earth-abundant, base metal salt/complex that not only results in good half-cell current densities for high-energy power-source DAFCs but also generates high-value sodium carbonate offers an exciting avenue.

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“…1 Several non-precious metals, including Sn, Bi, and Ni, have been investigated for their performance in ethanol electrooxidation. However, to address their limited catalytic properties and stability, these metals need to be combined with other metals, such as PtSn, 2 PtSnRh, 3 PtBi, 4 RhBi, 5 PdPtNi, 6 CoNiB, 7 CoNi, 8 to improve their low catalytic properties and stability. Previous studies identified Platinum 9–11 and Palladium 12 as the efficient electrocatalysts for low-temperature DEFC applications.…”

Section: Introductionmentioning

confidence: 99%