Selenium-transition metal supported on a mixture of reduced graphene oxide and silica template for water splitting

Selenium-transition metal supported on a mixture of reduced graphene oxide and silica template for water splitting

Exploration of economical, highly efficient, and environment friendly non-noble-metal-based electrocatalysts is necessary for hydrogen and oxygen evolution reactions (HER and OER) but challenging for cost-effective water splitting. Herein, metal selenium nanoparticles (M = Ni, Co & Fe) are ancho...

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Published in:RSC advances Vol. 13; no. 23; pp. 15856 - 15871
Main Authors: Amin, R. S, Fetohi, Amani E, Khater, D. Z, Lin, Jin, Wang, Yanzhong, Wang, Chao, El-Khatib, K. M
Format: Journal Article
Language:English
Published: England Royal Society of Chemistry 22-05-2023
The Royal Society of Chemistry
Subjects:
Charge transfer
Chemistry
Electrocatalysts
Graphene
Iron
Nanoparticles
Noble metals
Oxygen evolution reactions
Platinum
Ruthenium oxide
Selenium
Silicon dioxide
Stability tests
Transition metals
Water chemistry
Water splitting
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Summary:Exploration of economical, highly efficient, and environment friendly non-noble-metal-based electrocatalysts is necessary for hydrogen and oxygen evolution reactions (HER and OER) but challenging for cost-effective water splitting. Herein, metal selenium nanoparticles (M = Ni, Co & Fe) are anchored on the surface of reduced graphene oxide and a silica template (rGO-ST) through a simple one-pot solvothermal method. The resulting electrocatalyst composite can enhance mass/charge transfer and promote interaction between water molecules and electrocatalyst reactive sites. NiSe 2 /rGO-ST shows a remarkable overpotential (52.5 mV) at 10 mA cm −2 for the HER compared to the benchmark Pt/C E-TEK (29 mV), while the overpotential values of CoSeO 3 /rGO-ST and FeSe 2 /rGO-ST are 246 and 347 mV, respectively. The FeSe 2 /rGO-ST/NF shows a low overpotential (297 mV) at 50 mA cm −2 for the OER compared to RuO 2 /NF (325 mV), while the overpotentials of CoSeO 3 -rGO-ST/NF and NiSe 2 -rGO-ST/NF are 400 and 475 mV, respectively. Furthermore, all catalysts indicate negligible deterioration, indicating better stability during the process of HER and OER after a stability test of 60 h. The water splitting system composed of NiSe 2 -rGO-ST/NF||FeSe 2 -rGO-ST/NF electrodes requires only ∼1.75 V at 10 mA cm −2 . Its performance is nearly close to that of a noble metal-based Pt/C/NF||RuO 2 /NF water splitting system. Exploration of economical, highly efficient, and environment friendly non-noble-metal-based electrocatalysts is necessary for hydrogen and oxygen evolution reactions (HER and OER) but challenging for cost-effective water splitting.
Bibliography:https://doi.org/10.1039/d3ra01945d
Electronic supplementary information (ESI) available. See DOI
ObjectType-Article-1
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content type line 23
ISSN:2046-2069
2046-2069
DOI:10.1039/d3ra01945d