Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting
Zhu, Junjie; Guđmundsdóttir, Jónína B.; Strandbakke, Ragnar; Both, Kevin G.; Aarholt, Thomas; Carvalho, Patricia A.; Sørby, Magnus H.; Jensen, Ingvild J.T.; Guzik, Matylda N.; Norby, Truls; Haug, Halvard; Chatzitakis, Athanasios
Peer reviewed, Journal article
Published version
Date
2021Metadata
Show full item recordCollections
- Publikasjoner fra CRIStin - SINTEF AS [5852]
- SINTEF Industri [1571]
Original version
ACS Applied Materials & Interfaces. 2021, 13 (17), 20313-20325. 10.1021/acsami.1c01900Abstract
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.