Chemical state of phosphorus in amorphous Ni–Fe–P electroplates

Safonov, V. A.; Safonova, Оlga V.; Fishgoit, L. A.; Kvashnina, Kristina O.; Glatzel, Pieter

doi:10.1016/j.surfcoat.2015.05.013

Cited by 17 publications

(8 citation statements)

References 28 publications

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“…Nevertheless, the deposits showed a metallic luster, opposite to P-free deposits electroplated from an hypophosphitefree electrolyte, which exhibited a rough and matte surface (see Supporting Information, Figure S1). The presence of oxygen is in agreement with previous reports on electroplated Fe-P coatings [14,49]. Indeed, if the amounts are calculated in weight percentage, the content of oxygen in the films is between 1 and 10 wt%, therefore it is moderate.…”

Section: Resultssupporting

confidence: 91%

Functional macroporous iron-phosphorous films by electrodeposition on colloidal crystal templates

Golvano-Escobal

Paz-Castany

Alcantara

et al. 2019

Electrochimica Acta

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Pseudo-ordered macroporous iron-phosphorous (Fe-P) films have been electrodeposited potentiostatically from a citrate-sulfate bath onto Au surfaces pre-patterned with a colloidal crystal mask of polystyrene spheres of 350 nm in diameter. The electrolyte contained sodium hypophosphite as the P source, enabling the incorporation of 6-14 at.% P. For comparative purposes, continuous films have been obtained galvanostatically on unpatterned Au surfaces. In both cases, the P content could be varied to a certain extent by adjusting the deposition potential or current density. Tunable microstructure and magnetic response was observed due to the dissimilar chemical composition, with coercivity values being larger in the macroporous films. Additionally, wettability analyses showed that these were more hydrophobic, reaching contact angle values of about 130 ∘ . In spite of their hydrophobic character, the samples were catalytic toward oxygen evolution reaction (OER) in alkaline media. The macroporous Fe-P films showed faster kinetics for OER than their nonporous counterparts. Our results show that electrodeposited porous Fe-P based materials show an interesting combination of properties which make them appealing for applications including water cleaning, softmagnetic components, or electrocatalytic production of oxygen, to name a few.

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Section: Resultssupporting

confidence: 91%

Functional macroporous iron-phosphorous films by electrodeposition on colloidal crystal templates

Golvano-Escobal

Paz-Castany

Alcantara

et al. 2019

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…The XRD data were acquired under similar conditions as in [32] in order to confirm the amorphous structure of the initial coatings. Namely, the X-ray diffraction patterns of samples were measured according to the high-resolution powder diffraction technique.…”

Section: Methodsmentioning

confidence: 99%

“…In [32], we have described the details of measuring the Fe Kβ and Ni Kβ satellite lines, namely: the Fe Kβ were measured using five Ge(620) analyzer crystals with bending radius of 1006. NiO (99.99% purity, Sigma Aldrich), CoO (99.99% purity, Sigma Aldrich).…”

Section: Methodsmentioning

confidence: 99%

“…However, it should be noted that it was impossible to unambiguously conclude from XPS data whether metalloid atoms (carbon, phosphorous, boron) are present in these coatings only as components of the corresponding compounds (metal carbides, phosphides, borides) or partially as atoms in their elemental state. We discussed this issue in more detail in [31,32]. So, it is evident that to give the more substantiated answer to the question on the chemical state of metalloids in the considered coatings, one needs methods that directly probe the chemical bond in amorphous samples.…”

mentioning

confidence: 99%

“…The obvious continuation and extension of these vtc XES studies is the transition to amorphous deposits based on iron-group metals. Such studies were started in [31,32] where the binary Ni-P, Ni-B and ternary Ni-Fe-P coatings were considered. The present study is aimed at the electrochemical deposition of Ni-Co-P and Fe-Co-P coatings and their complex analysis by vtc XES technique along with the other traditional methods.…”

mentioning

confidence: 99%

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