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Ru(0001) - 0.1 M HClO4

echemdb identifier: alves_2011_electrochemistry_6010_f2_red tags: COOR

A cyclic voltammogramm for Ru(0001) recorded in CO containing 0.1 M HClO4 at a scan rate of 10.0 \(\mathrm{mV\,s^{-1}}\) from Figure 2 in O. B. Alves et al. Electrochemistry at Ru(0001) in a flowing CO-saturated electrolyte—reactive and inert adlayer phases. Physical Chemistry Chemical Physics, 13(13):6010–6021, 2011.

Further information

The figure shows digitized data.

The Ru(0001) electrode was prepared by:

Metadata

Details on the electrochemical system (yaml)
electrodes:
- function: reference electrode
  name: REF
  source:
    manufacturer: homemade
  type: RHE
- crystallographic orientation: '0001'
  function: working electrode
  material: Ru
  name: WE
  preparation procedure:
    description:
    - Sputtering and flash annealing under UHV conditions with repeated cycles of
      oxygen adsorption and desorption.
  shape:
    height:
      unit: mm
      value: 2
    type: hat shaped
  source:
    manufacturer: MaTecK
electrolyte:
  components:
  - name: H2O
    proportion:
      unit: volume percent
      value: 100
    source:
      quality: ultrapure water
      refinement: Millipore MilliQ
    type: solvent
  - concentration:
      unit: mol / l
      value: 0.1
    name: HClO4
    source:
      supplier: Merck Suprapur
    type: acid
  - name: CO
    proportion:
      unit: volume percent
      value: 100
    type: gas
  ph:
    value: 1
  temperature:
    unit: K
    value: 298.15
  type: aqueous
type: electrochemical
Citation key (bibtex)
@article{alves_2011_electrochemistry_6010,
    author = {Alves, Otavio B and Hoster, Harry E and Behm, Rolf J{\"u}rgen},
    title = "Electrochemistry at Ru(0001) in a flowing CO-saturated electrolyte—reactive and inert adlayer phases",
    journal = "Physical Chemistry Chemical Physics",
    volume = "13",
    number = "13",
    pages = "6010--6021",
    year = "2011",
    publisher = "Royal Society of Chemistry",
    abstract = "We investigated the electrochemical oxidation and reduction processes on ultrahigh vacuum prepared, smooth and structurally well-characterized Ru(0001) electrodes in a CO-saturated and, for comparison, in a CO-free flowing HClO4 electrolyte by electrochemical methods and by comparison with previous structural data. Structure and reactivity of the adsorbed layers are largely governed by a critical potential of E = 0.57 V, which determines the onset of Oad formation on the COad saturated surface in the positive-going scan and of Oadreduction in the negative-going scan. Oad formation proceeds via nucleation and 2D growth of high-coverage Oad islands in a surrounding COad phase, and it is connected with COadoxidation at the interface between the two phases. In the negative-going scan, mixed (COad + Oad) phases, most likely a (2 $\times$ 2)-(CO + 2O) and a (2$\times$2)-(2CO + O), are proposed to form at E $<$ 0.57 V by reduction of the Oad-rich islands and CO adsorption into the resulting lower-density Oad structures. CO bulk oxidation rates in the potential range E $>$ 0.57 V are low, but significantly higher than those observed during oxidation of pre-adsorbed CO in the CO-free electrolyte. We relate this to high local COad coverages due to CO adsorption in the CO-saturated electrolyte, which lowers the CO adsorption energy and thus the barrier for COadoxidation during CO bulk oxidation."
}
Details about the original figure in the publicaton (yaml).
comment: ''
fields:
- name: E
  orientation: x
  reference: RHE
  type: number
  unit: V
- name: j
  orientation: y
  type: number
  unit: mA / cm2
measurement type: CV
scan rate:
  unit: mV / s
  value: 10.0
simultaneous measurements: []
type: digitized
version: 1
Details about the curation process of this entry (yaml).
process:
- date: '2022-05-31'
  name: Albert Engstfeld
  orcid: https://orcid.org/0000-0002-9686-3948
  role: curator