Uncovering the Promotion of CeO2/CoS1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction

Tengyuan Dai; Xin Zhang; Mingzi Sun; Bolong Huang; Nan Zhang; Pengfei Da; Rui Yang; Zidong He; Wei Wang; Pinxian Xi; Chun Hua Yan

doi:10.1002/adma.202102593

Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction

Tengyuan Dai, Xin Zhang, Mingzi Sun, Bolong Huang, Nan Zhang, Pengfei Da, Rui Yang, Zidong He, Wei Wang, Pinxian Xi, Chun Hua Yan

Research output: Journal article publication › Journal article › Academic research › peer-review

142 Citations (Scopus)

Abstract

Structural engineering and compositional controlling are extensively applied in rationally designing and fabricating advanced freestanding electrocatalysts. The key relationship between the spatial distribution of components and enhanced electrocatalysis performance still needs further elaborate elucidation. Here, CeO₂ substrate supported CoS_1.97 (CeO₂-CoS_1.97) and CoS_1.97 with CeO₂ surface decorated (CoS_1.97-CeO₂) materials are constructed to comprehensively investigate the origin of spatial architectures for the oxygen evolution reaction (OER). CeO₂-CoS_1.97 exhibits a low overpotential of 264 mV at 10 mA cm⁻² due to the stable heterostructure and faster mass transfer. Meanwhile, CoS_1.97-CeO₂ has a smaller Tafel slope of 49 mV dec⁻¹ through enhanced adsorption of OH⁻, fast electron transfer, and in situ formation of Co(IV)O₂ species under the OER condition. Furthermore, operando spectroscopic characterizations combined with theoretical calculations demonstrate that spatial architectures play a distinguished role in modulating the electronic structure and promoting the reconstruction from sulfide to oxyhydroxide toward higher chemical valence. The findings highlight spatial architectures and surface reconstruction in designing advanced electrocatalytic materials.

Original language	English
Article number	2102593
Journal	Advanced Materials
Volume	33
Issue number	42
DOIs	https://doi.org/10.1002/adma.202102593
Publication status	Published - 21 Oct 2021

Keywords

heterostructures
oxygen evolution reaction
spatial architectures
structure-performance relationships
surface reconstruction

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

More information

10.1002/adma.202102593

http://hdl.handle.net/10397/95470

Cite this

@article{0f6fe9838fc749bf84eefb8ef27204aa,

title = "Uncovering the Promotion of CeO2/CoS1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction",

abstract = "Structural engineering and compositional controlling are extensively applied in rationally designing and fabricating advanced freestanding electrocatalysts. The key relationship between the spatial distribution of components and enhanced electrocatalysis performance still needs further elaborate elucidation. Here, CeO2 substrate supported CoS1.97 (CeO2-CoS1.97) and CoS1.97 with CeO2 surface decorated (CoS1.97-CeO2) materials are constructed to comprehensively investigate the origin of spatial architectures for the oxygen evolution reaction (OER). CeO2-CoS1.97 exhibits a low overpotential of 264 mV at 10 mA cm−2 due to the stable heterostructure and faster mass transfer. Meanwhile, CoS1.97-CeO2 has a smaller Tafel slope of 49 mV dec−1 through enhanced adsorption of OH−, fast electron transfer, and in situ formation of Co(IV)O2 species under the OER condition. Furthermore, operando spectroscopic characterizations combined with theoretical calculations demonstrate that spatial architectures play a distinguished role in modulating the electronic structure and promoting the reconstruction from sulfide to oxyhydroxide toward higher chemical valence. The findings highlight spatial architectures and surface reconstruction in designing advanced electrocatalytic materials.",

keywords = "heterostructures, oxygen evolution reaction, spatial architectures, structure-performance relationships, surface reconstruction",

author = "Tengyuan Dai and Xin Zhang and Mingzi Sun and Bolong Huang and Nan Zhang and Pengfei Da and Rui Yang and Zidong He and Wei Wang and Pinxian Xi and Yan, {Chun Hua}",

note = "Funding Information: T.D. and X.Z. contributed equally to this work. The authors acknowledge the support from the National Natural Science Foundation of China (no. 21931001 and 21922105), Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province (2019ZX‐04), and the 111 Project (B20027). B.H. acknowledges the support of the Natural Science Foundation of China (NSFC) (no. 21771156), and the Early Career Scheme (ECS) fund (grant no. PolyU 253026/16P) from the Research Grant Council (RGC) in Hong Kong. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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T1 - Uncovering the Promotion of CeO2/CoS1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction

AU - Dai, Tengyuan

AU - Zhang, Xin

AU - Sun, Mingzi

AU - Huang, Bolong

AU - Zhang, Nan

AU - Da, Pengfei

AU - Yang, Rui

AU - He, Zidong

AU - Wang, Wei

AU - Xi, Pinxian

AU - Yan, Chun Hua

N1 - Funding Information: T.D. and X.Z. contributed equally to this work. The authors acknowledge the support from the National Natural Science Foundation of China (no. 21931001 and 21922105), Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province (2019ZX‐04), and the 111 Project (B20027). B.H. acknowledges the support of the Natural Science Foundation of China (NSFC) (no. 21771156), and the Early Career Scheme (ECS) fund (grant no. PolyU 253026/16P) from the Research Grant Council (RGC) in Hong Kong. Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/10/21

Y1 - 2021/10/21

N2 - Structural engineering and compositional controlling are extensively applied in rationally designing and fabricating advanced freestanding electrocatalysts. The key relationship between the spatial distribution of components and enhanced electrocatalysis performance still needs further elaborate elucidation. Here, CeO2 substrate supported CoS1.97 (CeO2-CoS1.97) and CoS1.97 with CeO2 surface decorated (CoS1.97-CeO2) materials are constructed to comprehensively investigate the origin of spatial architectures for the oxygen evolution reaction (OER). CeO2-CoS1.97 exhibits a low overpotential of 264 mV at 10 mA cm−2 due to the stable heterostructure and faster mass transfer. Meanwhile, CoS1.97-CeO2 has a smaller Tafel slope of 49 mV dec−1 through enhanced adsorption of OH−, fast electron transfer, and in situ formation of Co(IV)O2 species under the OER condition. Furthermore, operando spectroscopic characterizations combined with theoretical calculations demonstrate that spatial architectures play a distinguished role in modulating the electronic structure and promoting the reconstruction from sulfide to oxyhydroxide toward higher chemical valence. The findings highlight spatial architectures and surface reconstruction in designing advanced electrocatalytic materials.

AB - Structural engineering and compositional controlling are extensively applied in rationally designing and fabricating advanced freestanding electrocatalysts. The key relationship between the spatial distribution of components and enhanced electrocatalysis performance still needs further elaborate elucidation. Here, CeO2 substrate supported CoS1.97 (CeO2-CoS1.97) and CoS1.97 with CeO2 surface decorated (CoS1.97-CeO2) materials are constructed to comprehensively investigate the origin of spatial architectures for the oxygen evolution reaction (OER). CeO2-CoS1.97 exhibits a low overpotential of 264 mV at 10 mA cm−2 due to the stable heterostructure and faster mass transfer. Meanwhile, CoS1.97-CeO2 has a smaller Tafel slope of 49 mV dec−1 through enhanced adsorption of OH−, fast electron transfer, and in situ formation of Co(IV)O2 species under the OER condition. Furthermore, operando spectroscopic characterizations combined with theoretical calculations demonstrate that spatial architectures play a distinguished role in modulating the electronic structure and promoting the reconstruction from sulfide to oxyhydroxide toward higher chemical valence. The findings highlight spatial architectures and surface reconstruction in designing advanced electrocatalytic materials.

KW - heterostructures

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