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XPS studies on the Mo oxide-based coatings electrodeposited from highly saturated acetate bath

Vernickaitė Edita; Lelis Martynas; Tsyntsaru Natalia; Cesiulis Henrikas


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{
  "DOI": "10.6001/chemija.v31i4.4317", 
  "author": [
    {
      "family": "Vernickait\u0117 Edita"
    }, 
    {
      "family": "Lelis Martynas"
    }, 
    {
      "family": "Tsyntsaru Natalia"
    }, 
    {
      "family": "Cesiulis Henrikas"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2020, 
        11, 
        3
      ]
    ]
  }, 
  "abstract": "<p>The possibility to use highly saturated acetate bath to electrodeposit<br>\nthe mixed-phase materials containing Mo oxides has been investigated.<br>\nThe XRD characterization revealed that the as-deposited coatings are<br>\namorphous and consist only of MoO2 and MoO3 phases without traces<br>\nof metallic Mo phase. This statement has been supported by XPS measurements,<br>\nwhich reveal the presence of three different molybdenum<br>\noxidations states in electrodeposits: Mo4+, Mo5+ and Mo6+. It was found<br>\nthat the Mo6+ state prevails with 41% of total contribution, whilst Mo5+<br>\nand Mo4+ contribute to 28 and 31%, respectively. The deposits retain an<br>\namorphous structure up to 800&deg;C; while molybdenum at this temperature<br>\nis predominantly oxidized to the Mo6+ state (91%). These results,<br>\ncoupled to those of SEM and EDS, revealed that concentrated acetate<br>\nbath could be used mainly for the formation of the mixed valence molybdenum<br>\noxide film unlike to the deposition of the metallic Mo phase.</p>", 
  "title": "XPS studies on the Mo oxide-based coatings electrodeposited from highly saturated acetate bath", 
  "note": "This study has partially received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk\u0142odowska-Curie grant agreement No 778357 and from European Social Fund, project No 09.3.3-LMT-K-712-08-0003 under grant agreement with the Research Council of Lithuania.", 
  "type": "article-journal", 
  "id": "4221500"
}
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