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Photoelectrochemical Activity of Layered Metal Phosphorous Trichalcogenides for Water Oxidation
Author(s) -
Oliveira Filipa M.,
Paštika Jan,
Pires Laura S.,
Sofer Zdeněk,
Gusmão Rui
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202100294
Subject(s) - materials science , water splitting , oxygen evolution , exfoliation joint , electrolyte , indium , substrate (aquarium) , oxide , metal , inorganic chemistry , indium tin oxide , catalysis , electrode , nanotechnology , optoelectronics , photocatalysis , thin film , electrochemistry , chemistry , metallurgy , biochemistry , graphene , oceanography , geology
2D layered materials are currently one of the most explored materials in developing efficient and stable photoelectrocatalysts in energy conversion applications. Some of the 2D metal phosphorus chalcogenides (M 2 P 2 X 6 or plainly MPX 3 ) have been reported to be useful catalysts for water splitting. Herein, the photoresponsivity of a series of synthesized M 2 P 2 X 6 (M 2+ = Mn, Fe, Co, Zn, Cd; X = S, Se), tested for the oxygen evolution reaction (OER) region in alkaline media, with excitation wavelengths from 385 to 700 nm, is reported. The experimentally determined optical bandgaps of the MPX 3 materials range from 1.5 eV for FePSe 3 to 3.7 eV for ZnPS 3 . At +1.23 V versus reversible hydrogen electrode (RHE), the photoelectrochemical (PEC) activity in the OER region of MnPSe 3 exhibits superior performance, while the exfoliation of CoPS 3 improves its PEC activity up to double in contrast with its bulk counterpart. The influence of the substrate (glassy carbon (GC), indium tin oxide (ITO), and aluminum‐doped zinc oxide (AZO)) and applied potential is also studied. Exfoliated CoPS 3 reaches a photoresponsivity of up to 0.6 mA W ‐1 under 450 nm excitation wavelength and at +1.23 V versus RHE in alkaline electrolyte.