Synergistic Germanium-Decorated h-BN/MoS 2 Heterostructure Nanosheets: An Advanced Electrocatalyst for Energy Storage Applications

M. Saravanan, Rajkumar Palanisamy, V. Sethuraman (), K. Diwakar, P. Senthil Kumar, P. Sundara Venkatesh, N. Kannan, R. Joel Kingston, K. Aravinth and Jinho Kim ()
Additional contact information
M. Saravanan: Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, Tamil Nadu, India
Rajkumar Palanisamy: Department of Mechanical Engineering, Yeungnam University, Gyeongbuk-do, Gyeongsan-si 38541, Republic of Korea
V. Sethuraman: Research and Development, New Energy Storage Technology, Lithium-ion Battery Division, Amara Raja Battery Ltd., Karakambadi, Tirupati 517520, Andhra Pradesh, India
K. Diwakar: Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, Tamil Nadu, India
P. Senthil Kumar: Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, Tamil Nadu, India
P. Sundara Venkatesh: Nanomaterials Laboratory, Department of Physics, Sri S. Ramasamy Naidu Memorial College, Sattur 626203, Tamil Nadu, India
N. Kannan: Nanomaterials Laboratory, Department of Physics, Sri S. Ramasamy Naidu Memorial College, Sattur 626203, Tamil Nadu, India
R. Joel Kingston: Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, Tamil Nadu, India
K. Aravinth: Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai 603110, Tamil Nadu, India
Jinho Kim: Department of Mechanical Engineering, Yeungnam University, Gyeongbuk-do, Gyeongsan-si 38541, Republic of Korea

Energies, 2023, vol. 16, issue 7, 1-13

Abstract: Increasing concerns about the vulnerability of the world’s energy supply and the necessity to implement sustainable technologies have prompted researchers to develop high-performance electrocatalysts that are affordable and efficient for converting and storing renewable energy. This article reports a facile approach to fabricating two-dimensional (2D) Ge-decorated h-BN/MoS 2 heterostructure nanosheets by self-assembly for multiple electrochemical applications such as supercapacitor and hydrogen evolution reactions. The organization of the physical and chemical links between the germanium modulations on the heterostructure of boron nitride/molybdenum sulphide (Ge/h-BN/MoS 2 ) were facilitated to generate more active sites. Furthermore, the asymmetric supercapacitor of Ge-decorated h-BN/MoS 2 amplified the capacitance to 558.53 F g −1 at 1 A g −1 current density and 159.19 F g −1 at 10 A g −1 , in addition to a retention rate of 85.69% after 2000 cycles. Moreover, the Ge-decorated h-BN/MoS 2 catalyst realized a low over-potential value, with an RHE of 0.57 (HER) at 5 mA/cm 2 , a Tafel value of ∼204 mV/dec, and long-term electrolysis stability of 10 h. This work may open the door for further investigations on metal-decorated heterostructures, which have a significant potential for both supercapacitor and water-splitting applications.

Keywords: electrocatalysis; hydrogen evolution reaction; Ge/h-BN/MoS 2; energy storage application; layered heterostructure (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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