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

Author(s)

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

Detail(s)

Original language	English
Article number	2102593
Journal / Publication	Advanced Materials
Volume	33
Issue number	42
Online published	3 Sept 2021
Publication status	Published - 21 Oct 2021
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1002/adma.202102593 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85114186091&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(7b419e72-770d-44da-a868-f03d683550dd).html

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. © 2021 Wiley-VCH GmbH

Research Area(s)

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

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Citation Format(s)

[ RIS ] [ BibTeX ]

Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction. / Dai, Tengyuan; Zhang, Xin; Sun, Mingzi et al.
In: Advanced Materials, Vol. 33, No. 42, 2102593, 21.10.2021.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Dai, T, Zhang, X, Sun, M, Huang, B, Zhang, N, Da, P, Yang, R, He, Z, Wang, W, Xi, P & Yan, C-H 2021, 'Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction', Advanced Materials, vol. 33, no. 42, 2102593. https://doi.org/10.1002/adma.202102593

Dai, T., Zhang, X., Sun, M., Huang, B., Zhang, N., Da, P., Yang, R., He, Z., Wang, W., Xi, P., & Yan, C.-H. (2021). Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction. Advanced Materials, 33(42), Article 2102593. https://doi.org/10.1002/adma.202102593

Dai T, Zhang X, Sun M, Huang B, Zhang N, Da P et al. Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction. Advanced Materials. 2021 Oct 21;33(42):2102593. Epub 2021 Sept 3. doi: 10.1002/adma.202102593

Dai, Tengyuan ; Zhang, Xin ; Sun, Mingzi et al. / Uncovering the Promotion of CeO₂/CoS_1.97 Heterostructure with Specific Spatial Architectures on Oxygen Evolution Reaction. In: Advanced Materials. 2021 ; Vol. 33, No. 42.