TY - JOUR
T1 - Rational synthesis of MOF-Derived Cobalt-Based binary selenides nanocrystals for electrochemical oxygen evolution reaction
AU - Al-Shaibah, Faozia N.
AU - Ibrahim, Mariam A.A.
AU - Abu Hatab, Aymen S.
AU - Abotaleb, Ahmed
AU - Sinopoli, Alessandro
AU - Zekri, Atef
AU - Ahmad, Yahia H.
AU - Al-Qaradawi, Siham Y.
N1 - Publisher Copyright:
© 2025 The Author(s)
PY - 2025/4/15
Y1 - 2025/4/15
N2 - Water splitting is considered as one of the key reactions in energy conversion and storage. In this context, development of low-cost durable electrocatalysts for water splitting, in particular, oxygen evolution reaction (OER) is of utmost importance. Herein, we report the synthesis of Co-based selenides, i.e., Co-Se, NiCo-Se, FeCoSe and MoCo-Se via the synthesis of hybrid MOF nanostructures, followed by hydrothermal process. Among them, CoMo-Se exhibited superior electrocatalytic activity towards OER in 1 M KOH solution compared to other catalyst and benchmark IrO2. For example, it exhibited an overpotential (ti10) of 268 mV at a current density of 10 mA cm- 2 , whereas the recorded values for CoFe-Se, CoNi-Se, Co-Se and IrO2 were 312, 346, 374 and 311 mV, respectively at the same current density. In the same context, CoMo-Se revealed a Tafel slope of 55.6 mV decade- 1 , while the calculated values for CoFe-Se, CoNi-Se, Co-Se and IrO2 were 60.4, 97.9, 85.4 and 81.6 mV decade- 1 , respectively. The superior catalytic performance of CoMo-Se was attributed to its unique porous architecture with high electrochemical active surface area (ECSA), enhanced electrical conductivity, high value of double layer capacitance (Cdl) and the high content of Co3+. This work provides a feasible route for designing MOF-derived bimetallic selenides for the energy conversion and storage applications.
AB - Water splitting is considered as one of the key reactions in energy conversion and storage. In this context, development of low-cost durable electrocatalysts for water splitting, in particular, oxygen evolution reaction (OER) is of utmost importance. Herein, we report the synthesis of Co-based selenides, i.e., Co-Se, NiCo-Se, FeCoSe and MoCo-Se via the synthesis of hybrid MOF nanostructures, followed by hydrothermal process. Among them, CoMo-Se exhibited superior electrocatalytic activity towards OER in 1 M KOH solution compared to other catalyst and benchmark IrO2. For example, it exhibited an overpotential (ti10) of 268 mV at a current density of 10 mA cm- 2 , whereas the recorded values for CoFe-Se, CoNi-Se, Co-Se and IrO2 were 312, 346, 374 and 311 mV, respectively at the same current density. In the same context, CoMo-Se revealed a Tafel slope of 55.6 mV decade- 1 , while the calculated values for CoFe-Se, CoNi-Se, Co-Se and IrO2 were 60.4, 97.9, 85.4 and 81.6 mV decade- 1 , respectively. The superior catalytic performance of CoMo-Se was attributed to its unique porous architecture with high electrochemical active surface area (ECSA), enhanced electrical conductivity, high value of double layer capacitance (Cdl) and the high content of Co3+. This work provides a feasible route for designing MOF-derived bimetallic selenides for the energy conversion and storage applications.
KW - Bimetallic selenides
KW - Cobalt-based electrocatalysts
KW - Metal organic framework-derived catalyst
KW - Oxygen evolution reaction
UR - http://www.scopus.com/inward/record.url?scp=85215401198&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2025.162479
DO - 10.1016/j.apsusc.2025.162479
M3 - Article
AN - SCOPUS:85215401198
SN - 0169-4332
VL - 688
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 162479
ER -