Heterostructures of tin and tungsten selenides for robust overall water splitting.

Velpandian, M. and Ummethala, G. and Malladi, Sairam K and Meduri, Praveen (2022) Heterostructures of tin and tungsten selenides for robust overall water splitting. Journal of Colloid and Interface Science, 623. pp. 561-573. ISSN 0021-9797

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Abstract

Layered transition metal selenides have garnered increased attention in recent times as non-noble metal bifunctional electrocatalysts for electrochemical water splitting. Tungsten diselenide @ tin diselenide heterostructures in the present study significantly increase the electrochemical performance of oxygen evolution reaction with a low overpotential of 250 mV at 10 mA cm−2 and high stability for 16 h (8.9 % loss), hydrogen evolution reaction with a low overpotential of 180 mV at 10 mA cm−2 with a 21.9% loss in 16 h. The overall water splitting using a lab-size electrolyzer shows a low cell voltage (1.52 V @ 10 mA cm−2) and high durability for 50 h (15.2% loss @ 10 mA cm−2 and 4.4% loss @ 50 mA cm−2). As a result, the heterostructures have demonstrated their ability to handle multiple challenges in energy conversion systems due to their unique properties. © 2022 Elsevier Inc.

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IITH Creators:

IITH Creators	ORCiD
Malladi, Sairam K	UNSPECIFIED
Meduri, Praveen	https://orcid.org/0000-0002-2100-4209

Item Type:

Article

Additional Information:

We would like to thank the Indian Institute of Technology, Hyderabad for the financial support in providing the necessary research facilities (under grant number INTDEC/20-21/F148/ID- 06). We would also like to thank the TEM, XRD, and Raman facili- ties in the institute for their help. DST-FIST program (under grant no. SR/FST/ETI-421/2016) provided financial assistance to SRKM.

Uncontrolled Keywords:

Bifunctional electrocatalyst, Heterostructures, Hydrogen evolution reaction (HER), Metal selenides, Oxygen evolution reaction (OER)

Subjects:

Chemical Engineering

Divisions:

Department of Chemical Engineering
Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

17 Jun 2022 11:54

Last Modified:

22 Jun 2022 07:46