abstract
A variety of mixed-cation metal phosphorus trichalcogenides (MnNiP2S6, FeCoP2S6, FeNiP2S6, CoNiP2S6, FeCoNiP2S6, and the high-entropy CrMnFeNiCoZnP2S6) are synthesized using chemical vapor transport and tested for water splitting under alkaline conditions. Among the materials synthesized, FeCoP2S6 demonstrates the most promising performance, acting as a catalyst with an overpotential of 409 mV and 325 mV for the hydrogen evolution reaction and oxygen evolution reaction (OER), respectively. To further enhance its catalytic activity, a combination of liquid-phase exfoliation techniques assisted by microwave and sonication is employed to FeCoP2S6 (exf-FeCoP2S6), thereby increasing the surface area and exposing more active sites. Promising results are obtained for the OER, with exf-FeCoP2S6 displaying an over -potential of 271 mV, a value very closely matching the best performances reported in the literature under alkaline conditions. Long-term stability tests show a stable profile over time, corroborated by the XPS analysis and computer modeling, which confirms minimal degradation of the catalyst.(c) 2023 Elsevier Ltd. All rights reserved.
keywords
FEW-LAYER NIPS3; OXYGEN EVOLUTION; HYDROGEN; THIOPHOSPHATE; NANOPARTICLES; 2D
subject category
Chemistry; Energy & Fuels; Materials Science
authors
Oliveira, FM; Pastika, J; Ayaz, I; Mazánek, V; Plutnarová, I; Zeng, LJ; Olsson, E; Amorim, CO; -Franco, MM; Gusma, R; Sofer, Z
our authors
Carlos Amorim
Assistant Researcher
Manuel Melle-Franco
Principal ResearcherProjects
Projeto de Investigação Exploratória: Manuel Melle (IF Manuel Melle)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
The authors acknowledge funding from the ERC-CZ program (project LL2101) from the Ministry of Education Youth and Sports (MEYS) and large infrastructure from project Advanced Functional Nanorobots (reg. No. CZ.02.1.01/0.0/0.0/15_003/0000444 financed by the European Regional Development Fund (ERDF) ) . J.P. ac- knowledges support from the grant of specific university research-A2_FCHT_2023_102. In addition, M.M.F. support through the project IF/00894/2015 and within the scope of the project CICECO- Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) is gratefully acknowledged. E.O. received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 823717-ESTEEM3. This work was performed in part at the Chalmers Material Analysis Laboratory, CMAL.