Sonication strategy for anchoring single metal atom oxides (W, Cu, Co) on CeO2-rGO for boosting electrocatalytic oxygen evolution reaction - 文章详情页

作者：

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.)

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EI Scopus

摘要：

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

关键词：

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

作者机构：

[ 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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