Au(111) - \(0.1 \; \mathrm{M}\) \(\ce{ HClO4 }\) + \(0.1 \; \mathrm{M}\) \(\ce{ H3PO4 }\) + \(0.1 \; \mathrm{M}\) \(\ce{ HCOOH }\)

echemdb identifier: hermann_2021_effect_138279_f5a_green
tags: FAOR

A cyclic voltammogramm for Au(111) recorded in \(0.1 \; \mathrm{M}\) \(\ce{ HClO4 }\) + \(0.1 \; \mathrm{M}\) \(\ce{ H3PO4 }\) + \(0.1 \; \mathrm{M}\) \(\ce{ HCOOH }\) at a scan rate of \(10 \; \mathrm{mV\,s^{-1}}\) from Figure 5a in J. M. Hermann et al. The Effect of pH and Anion Adsorption on Formic Acid Oxidation on Au\(111\) Electrodes. Electrochimica Acta, 385:138279, 2021. doi:10.1016/j.electacta.2021.138279.

Further information

The figure shows raw data.

The Au(111) electrode was prepared by:
* oval shape with 4 and 3.95 mm diameter

Metadata

Details on the electrochemical system (yaml)

electrochemicalCell:
  type: beaker cell
electrodes:
- description: "SI Analytics B3610+\n  potentialDefiningConcentration:\npotassium\
    \ sulfate: sat.\n"
  function: reference electrode
  material: Hg
  name: RE
  redoxSystem: Hg/Hg2SO4
- crystallographicOrientation: '111'
  function: working electrode
  geometricElectrolyteContactArea:
    unit: "cm\u207B\xB2"
    value: 0.1241
  material: Au
  name: WE
  preparationProcedure:
    description:
    - oval shape with 4 and 3.95 mm diameter
  purity:
    grade: 5N
  shape:
    diameter:
      unit: mm
      value: 4
    height:
      unit: mm
      value: 5
    type: cylinder
  source:
    supplier: MaTecK GmbH
  type: single crystal
electrolyte:
  components:
  - name: water
    proportion:
      unit: volume percent
      value: 100
    purity:
      totalIonConductivity:
        unit: MOhm cm
        value: 18.2
      totalOrganicCarbon:
        unit: ppb
        value: 3
    source:
      purity:
        grade: ultrapure water
      refinement: Sartorius arium 611UV
    type: solvent
  - chemicalIdentifiers:
      cas: 7664-93-9
    concentration:
      unit: "mol L\u207B\xB9"
      value: 0.1
    name: HClO4
    source:
      supplier: Merck Suprapur
    type: acid
  - chemicalIdentifiers:
      cas: 7664-38-2
    concentration:
      unit: "mol L\u207B\xB9"
      value: 0.1
    name: H3PO4
    source:
      supplier: Merck Suprapur
    type: acid
  - chemicalIdentifiers:
      cas: 64-18-6
    concentration:
      unit: "mol L\u207B\xB9"
      value: 0.1
    name: HCOOH
    source:
      supplier: Merck Suprapur
    type: acid
  ph:
    comment: "Estimated with CurTiPot (v4.4.0) using a temperature of 25 \xB0C."
    value: 1.069
  temperature:
    unit: deg_C
    value: 20
  type: aqueous
type: electrochemical

Citation key (bibtex)

@article{hermann_2021_effect_138279,
    author = "Hermann, Johannes M. and Abdelrahman, Areeg and Jacob, Timo and Kibler, Ludwig A.",
    title = "The Effect of pH and Anion Adsorption on Formic Acid Oxidation on Au(111) Electrodes",
    journal = "Electrochimica Acta",
    volume = "385",
    pages = "138279",
    year = "2021",
    publisher = "Elsevier",
    issn = "0013-4686",
    doi = "10.1016/j.electacta.2021.138279",
    abstract = "The impact of solution pH has been investigated for the electrooxidation of formic acid on Au(111), taking the mole fraction of formate in solution as the relevant parameter. The electrocatalytic current density is increasing with rising pH and reaches a plateau for pH > 4. The pH-dependence of characteristic potentials shows systematic trends for the onset of the reaction, the peak maximum, and the phase transition within the formate adlayer. After the addition of phosphate buffer, a substantial deactivation by specific adsorption of phosphates and a bell-shaped curve for the maximum current density as a function of pH is found. The general behavior of co-adsorbing anions is addressed at low pH using various oxyanions to get more insight into the role of adsorbed formate. While non-carboxylate anions are displaced by formate at high potentials, mixed phases are observed for formate and other carboxylates."
}

Details about the original figure in the publicaton (yaml).

fields:
- name: t
  type: number
  unit: s
- name: E
  reference: MSE-sat.
  type: number
  unit: V
- name: I
  type: number
  unit: A
- name: cycle
  type: integer
measurementType: CV
scanRate:
  unit: mV / s
  value: 10
type: raw

Details about the curation process of this entry (yaml).

process:
- name: Johannes M. Hermann
  orcid: https://orcid.org/0000-0001-7119-1295
  role: experimentalist
- name: Ludwig A. Kibler
  orcid: https://orcid.org/0000-0003-1152-1445
  role: supervisor

---