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Author:

Selvakumar, Karuppaiah (Selvakumar, Karuppaiah.) | Oh, Tae Hwan (Oh, Tae Hwan.) | Wang, Yueshuai (Wang, Yueshuai.) | Sadhasivam, Thangarasu (Sadhasivam, Thangarasu.) | Sadhasivam, Subramani (Sadhasivam, Subramani.) | Swaminathan, Meenakshisundaram (Swaminathan, Meenakshisundaram.)

Indexed by:

EI Scopus

Abstract:

In the field of electrocatalysis, single-atomic-layer tungsten, copper, and cobalt oxide on CeO2, ethylene diamine (ED) and reduced graphene oxide (rGO) supported materials shows tremendous potential. Despite the enormous interest in single metal atom oxide (SMAO) catalysts, it is still very difficult to directly convert readily available bulk metal oxide into single atom oxide. It is crucial and tough to create high performance materials for the oxygen evolution reaction (OER) in an alkaline environment. Herein, a single tungsten, copper and cobalt atom oxide (SMAO) anchored on the CeO2 atomic layer and overall components deposited on the rGO (rGO-ED-CeO2-WCuCo) is prepared through a one-pot sonication technique. The presence of SMAO is identified by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging. The electrocatalytic performance of final rGO-ED-CeO2-WCuCo-30 nanocomposite for the OER in 1 M KOH electrolyte is evidenced by providing low overpotential of 283 mV at 10 mA cm−2. The Tafel slope for OER using rGO-ED-CeO2-WCuCo-30 electrocatalysts is 57.03 mV dec−1. The electrocatalytic activity of rGO-ED-CeO2-WCuCo-30 nanocomposites for OER was noticeably increased when compared to bare CeO2 nanorods (401 mV), rGO-ED-CeO2-WCo-30 (345 mV), rGO-ED-CeO2-WCu-30 (340 mV) and rGO-ED-CeO2-WCuCo-20 (321 mV) samples. © 2023 Elsevier Ltd

Keyword:

Oxygen Electrocatalysts Nanocomposites Electrocatalysis Cobalt compounds Graphene Cerium oxide Cobalt deposits Scanning electron microscopy Nanorods Potassium hydroxide High resolution transmission electron microscopy Copper oxides Ethylene Sonication Atoms Amines Electrolytes

Author Community:

  • [ 1 ] [Selvakumar, Karuppaiah]School of Chemical Engineering, Yeungnam University, Gyeongsan; 38541, Korea, Republic of
  • [ 2 ] [Oh, Tae Hwan]School of Chemical Engineering, Yeungnam University, Gyeongsan; 38541, Korea, Republic of
  • [ 3 ] [Wang, Yueshuai]Institute of Microstructure and Properties of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Sadhasivam, Thangarasu]School of Chemical Engineering, Yeungnam University, Gyeongsan; 38541, Korea, Republic of
  • [ 5 ] [Sadhasivam, Subramani]School of Chemical Engineering, Yeungnam University, Gyeongsan; 38541, Korea, Republic of
  • [ 6 ] [Swaminathan, Meenakshisundaram]Nanomaterials Laboratory, Department of Chemistry, Kalasalingam Academy of Research and Education, Krishnankoil; 626126, India

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Source :

Chemosphere

ISSN: 0045-6535

Year: 2023

Volume: 341

8 . 8 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:17

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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