Air- and water-stable and photocatalytically active germanium-based 2D perovskites by organic spacer engineering.

Authors :: Romani L
Speltini A
Chiara R
Morana M
Coccia C
Tedesco C
Armenise V
Colella S
Milella A
Listorti A
Profumo A
Ambrosio F
Mosconi E
Pau R
Pitzalis F
Simbula A
Ricciarelli D
Saba M
Medina-Llamas M
De Angelis F
Malavasi L
Source :: Cell reports. Physical science [Cell Rep Phys Sci] 2023 Jan 18; Vol. 4 (1), pp. 101214. Date of Electronic Publication: 2023 Jan 18.
Publication Year :: 2023
Abstract: There is increasing interest in the role of metal halide perovskites for heterogeneous catalysis. Here, we report a Ge-based 2D perovskite material that shows intrinsic water stability realized through organic cation engineering. Incorporating 4-phenylbenzilammonium (PhBz) we demonstrate, by means of extended experimental and computational results, that PhBz <subscript>2</subscript> GeBr <subscript>4</subscript> and PhBz <subscript>2</subscript> GeI <subscript>4</subscript> can achieve relevant air and water stability. The creation of composites embedding graphitic carbon nitride (g-C <subscript>3</subscript> N <subscript>4</subscript> ) allows a proof of concept for light-induced hydrogen evolution in an aqueous environment by 2D Ge-based perovskites thanks to the effective charge transfer at the heterojunction between the two semiconductors.<br />Competing Interests: The authors declare no competing interests.<br /> (© 2022 The Author(s).)

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