Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting | Zendy

Junjie Zhu | Zendy; Jónína B. Guđmundsdóttir | Zendy; Ragnar Strandbakke | Zendy; Kevin G. Both | Zendy; Thomas Aarholt | Zendy; P.A. Carvalho | Zendy; Magnus H. Sørby | Zendy; Ingvild Julie Thue Jensen | Zendy; Matylda N. Guzik | Zendy; Truls Norby | Zendy; H. Haug | Zendy; Athanasios Chatzitakis | Zendy

Open Access

Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting

Author(s) -

Junjie Zhu,

Jónína B. Guđmundsdóttir,

Ragnar Strandbakke,

Kevin G. Both,

Thomas Aarholt,

P.A. Carvalho,

Magnus H. Sørby,

Ingvild Julie Thue Jensen,

Matylda N. Guzik,

Truls Norby,

H. Haug,

Athanasios Chatzitakis

Publication year - 2021

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.1c01900

Subject(s) - photoelectrolysis , materials science , water splitting , perovskite (structure) , electrolysis of water , noble metal , ceramic , cathode , chemical engineering , cobaltite , electrolysis , catalysis , inorganic chemistry , metal , metallurgy , photocatalysis , electrode , chemistry , engineering , electrolyte , biochemistry

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. Ba 1- x Gd 1- y La x + y Co 2 O 6-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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