Oxygen evolution on Ebonex-supported Pt-based binary compounds in PEM water electrolysis

Stoyanova, Antonia; Borisov, G.; Lefterova, E.; Slavcheva, E.

doi:10.1016/j.ijhydene.2012.02.032

Cited by 15 publications

(5 citation statements)

References 25 publications

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“…The cathode for the HER in SPE water electrolysis has a low overpotential. Widely used cathodes, to date, are noble‐metal platinum catalysts, including Pt/C, Pt nanoparticles (NPs)/carbon nanofibers (CNFs), Pt/graphitic nanofibers (GNF), Pt−Fe, or Pt−C, because Pt element has an incompletely filled d orbital, and the outermost electron structure of 5 d 9 6 s 1 and suitable atomic radius of 177 pm favor the adsorption of H atoms and the desorption of H 2 , that is, faster kinetics of electron reduction to H 2 results in a lower activation energy, and thus, lower hydrogen evolution potential. To reduce the amount of Pt and increase its electrochemical specific surface area, it has been usually prepared as Pt particles and supported on a porous carbon substrate, for example, Pt/C catalyst particles.…”

Section: Introductionmentioning

confidence: 99%

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

et al. 2019

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Chemical energy conversion/storage through water splitting for hydrogen production has been recognized as the ideal solution to the transient nature of renewable energy sources. Solid polymer electrolyte (SPE) water electrolysis is one of the most practical ways to produce pure H2. Electrocatalysts are key materials in the SPE water electrolysis. At the anode side, electrode materials catalyzing the oxygen evolution reaction (OER) require specific properties. Among the reported materials, only iridium presents high activity and is more stable. In this Minireview, an application overview of single iridium metal and its oxide catalysts—binary, ternary, and multicomponent catalysts of iridium oxides and supported composite catalysts—for the OER in SPE water electrolysis is presented. Two main strategies to improve the activity of an electrocatalyst system, namely, increasing the number of active sites and the intrinsic activity of each active site, are reviewed with detailed examples. The challenges and perspectives in this field are also discussed.

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Section: Introductionmentioning

confidence: 99%

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

et al. 2019

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“…PEMECs use a proton exchange membrane (PEM) as the electrolyte, which permits proton transport from anode to cathode, and typically, IrRuO x and Pt/B are used as the anode and cathode catalysts, respectively. Two of the main cost drivers inhibiting more widespread PEMEC use are catalyst loading/ catalyst use for the electrochemical reaction and degradation of materials and components, as a result of the electrochemical reaction (22)(23)(24)(25)(26)(27)(28)(29).…”

Section: Introductionmentioning

confidence: 99%

Discovery of true electrochemical reactions for ultrahigh catalyst mass activity in water splitting

et al. 2016

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“…Generally, it is thought the appearance of redox peak is arising from resultant fine IrO 2 crystals on the surface of the IrO 2 /Ti anode, which causes its increase of the electrical contact improvement in the apparent electrochemical activity. 32–34 In this case, the nanowire array of IrO 2 coating significantly increases the specific surface area of the activating oxide, which gives rise to higher opportunity to be oxidised and thus obtains an obvious redox peak as compared to the electrode using the densified Ti substrate in Hou et al . 23…”

Section: Resultsmentioning

confidence: 99%

Characterisation and properties of powder-rolled porous Ti sheets and IrO₂/Ti electrodes

Chen

Xiang

et al. 2016

Powder Metallurgy

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This report investigated synthesis of porous Ti sheets by direct powder rolling followed by vacuum sintering at 1100°C for 1.5 h. Uniform microstructures were observed in the sections longitudinal and transverse to rolling direction in terms of porosity, pore size, gas permeability and filtration efficiency. IrO 2 nanowire arrays were coated onto the powder-rolled porous Ti substrate as an electrode by thermal decomposition. Characterisation results show that the coating mainly exhibited mixture of IrO 2 and α-Ti phases. The coating of IrO 2 nanowire arrays effectively increased the specific surface area of the IrO 2 /Ti electrode and reached over 95% of current efficiency. The cyclic voltammetry test of the electrode showed an obvious redox peak due to its increased specific surface area by the porous Ti substrate.

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Oxygen evolution on Ebonex-supported Pt-based binary compounds in PEM water electrolysis

Cited by 15 publications

References 25 publications

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

Discovery of true electrochemical reactions for ultrahigh catalyst mass activity in water splitting

Characterisation and properties of powder-rolled porous Ti sheets and IrO₂/Ti electrodes

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Oxygen evolution on Ebonex-supported Pt-based binary compounds in PEM water electrolysis

Cited by 15 publications

References 25 publications

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

Iridium‐Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting

Discovery of true electrochemical reactions for ultrahigh catalyst mass activity in water splitting

Characterisation and properties of powder-rolled porous Ti sheets and IrO2/Ti electrodes

Contact Info

Product

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Characterisation and properties of powder-rolled porous Ti sheets and IrO₂/Ti electrodes