Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction

Tariq，Irsa1; Asghar，Muhammad Adeel1; Ali，Abid2; Badshah，Amin1,3; Abbas，Syed Mustansar4; Iqbal，Waheed1; Zubair，Muhammad1; Haider，Ali1,3; Zaman，Shahid5

2022-10-01

10.3390/catal12101242

Catalysts   Impact Factor & Quartile

2073-4344

Polyoxometalates (POMs), as carbon-free metal-oxo-clusters with unique structural properties, are emerging water-splitting electrocatalysts. Herein, we explore the development of cobalt-containing polyoxometalate immobilized over the carbon nanotube fiber (CNTF) (CoPOM@CNTF) towards efficient electrochemical oxygen evolution reaction (OER). CNTF serves as an excellent electron mediator and highly conductive support, while the self-activation of the part of CoPOM through restructuring in basic media generates cobalt oxides and/or hydroxides that serve as catalytic sites for OER. A modified electrode fabricated through the drop-casting method followed by thermal treatment showed higher OER activity and enhanced stability in alkaline media. Furthermore, advanced physical characterization and electrochemical results demonstrate efficient charge transfer kinetics and high OER performance in terms of low overpotential, small Tafel slope, and good stability over an extended reaction time. The significantly high activity and stability achieved can be ascribed to the efficient electron transfer and highly electrochemically active surface area (ECSA) of the self-activated electrocatalyst immobilized over the highly conductive CNTF. This research is expected to pave the way for developing POM-based electrocatalysts for oxygen electrocatalysis.

carbon nanotube fibers electrocatalysis oxygen evolution reaction polyoxometalates water oxidation

SCI

English

Corresponding

Higher Education Commision, Pakistan[20-14419/NRPU/R&D/HEC/2021];Higher Education Commission, Pakistan[20-14419/NRPU/R&D/HEC/2021];Instytut Katalizy i Fizykochemii Powierzchni im. Jerzego Habera, Polskiej Akademii Nauk[2021-23];Instytut Katalizy i Fizykochemii Powierzchni im. Jerzego Habera, Polskiej Akademii Nauk[2021-23];Polska Akademia Nauk[2021-23];Pakistan Academy of Sciences[2021-23];Pennsylvania Academy of Science[2021-23];

Chemistry

Chemistry, Physical

WOS:000872347200001

MDPI

2-s2.0-85140836691

Scopus

1.Department of Chemistry,Quaid-i-Azam University,Islamabad,45320,Pakistan
2.Department of Chemistry,The University of Lahore,Lahore,54590,Pakistan
3.Pakistan Academy of Science,Islamabad,3-Constitution Avenue Sector G-5/2,44000,Pakistan
4.Nanoscience and Technology Department,National Centre for Physics,Islamabad,Quaid-i-Azam University Campus,45320,Pakistan
5.Key Laboratory of Energy Conversion and Storage Technologies,Southern University of Science and Technology,Shenzhen,518055,China

Tariq，Irsa,Asghar，Muhammad Adeel,Ali，Abid,et al. Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction[J]. Catalysts,2022,12(10).

Tariq，Irsa.,Asghar，Muhammad Adeel.,Ali，Abid.,Badshah，Amin.,Abbas，Syed Mustansar.,...&Zaman，Shahid.(2022).Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction.Catalysts,12(10).

Tariq，Irsa,et al."Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction".Catalysts 12.10(2022).