Jonina Björg Gudmundsdottir

• Zhu, Junjie; Gudmundsdottir, Jonina Björg; Strandbakke, Ragnar; Both, Kevin Gregor; Aarholt, Thomas & Almeida Carvalho, Patricia [Show all 12 contributors for this article] (2021). Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting. ACS Applied Materials & Interfaces. ISSN 1944-8244. 13(17), p. 20313–20325. doi: 10.1021/acsami.1c01900. Full text in Research Archive Show summary

  Water photoelectrolysis has the potential to produce renewable hydrogen fuel, therefore addressing the intermittent nature of sunlight. Herein, a monolithic, photovoltaic (PV)-assisted water electrolysis device of minimal engineering and of low (in the μg range) noble-metal-free catalysts loading is presented for unassisted water splitting in alkaline media. An efficient double perovskite cobaltite catalyst, originally developed for high-temperature proton-conducting ceramic electrolyzers, possesses high activity for the oxygen evolution reaction in alkaline media at room temperatures too. Ba1–xGd1–yLax+yCo2O6−δ (BGLC) is combined with a NiMo cathode, and a solar-to-hydrogen efficiency of 6.6% in 1.0 M NaOH, under 1 sun simulated illumination for 71 h, is demonstrated. This work highlights how readily available earth-abundant materials and established PV methods can achieve high performance and stable and monolithic photoelectrolysis devices with potential for full-scale applications.

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• Gudmundsdottir, Jonina Björg (2023). Oxygen on the IrO2 (110) Surface - A DFT Study.
• Gudmundsdottir, Jonina Björg; Vøllestad, Einar; Haugsrud, Reidar & Polfus, Jonathan (2023). Oxygen Exchange Kinetics of BaGd0.3La0.7Co2O6-d.
• Chatzitakis, Athanasios; Zhu, Junjie; Gudmundsdottir, Jonina Björg; Strandbakke, Ragnar; Both, Kevin Gregor & Aarholt, Thomas [Show all 12 contributors for this article] (2022). A monolithic and noble metal-free photoelectrochemical device of minimal engineering for efficient, unassisted water splitting.
• Gudmundsdottir, Jonina Björg; Thoreton, Vincent; Vøllestad, Einar & Polfus, Jonathan (2022). Oxygen Exchange Kinetics of BaGd0.3La0.7Co2O6-d Steam Electrodes for Proton Ceramic Electrochemical Cells.
• Gudmundsdottir, Jonina Björg; Norby, Truls & Chatzitak, Athanasios (2021). Double Perovskite Cobaltites as Oxygen Evolution Reaction Catalysts in Electrochemical and Photoelectrochemical Water Splitting Cells. Universitetet i Oslo.

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