Imperial College London
Alternate

Professor Jason Riley

Faculty of Engineering, Department of Materials

Vice-Dean (Education) for the Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6751jason.riley

 
 
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Location

 

B3.37Bessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhang:2022:10.1002/adfm.202205974,
author = {Zhang, H and Diao, J and Ouyang, M and Yadegari, H and Mao, M and Wang, J and Henkelman, G and Xie, F and Riley, DJ},
doi = {10.1002/adfm.202205974},
journal = {Advanced Functional Materials},
pages = {1--12},
title = {Enhancing the performance of Bi2S3 in electrocatalytic and supercapacitor applications by controlling lattice strain},
url = {http://dx.doi.org/10.1002/adfm.202205974},
volume = {32},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Lattice-strained Bi2S3 with 3D hierarchical structures are prepared through a top-down route by a topotactic transformation. High-resolution transmission electron microscopy and X-ray diffraction (XRD) confirm the lattice spacing is expanded by prolonged sulfuration. Performance studies demonstrate that Bi2S3 with the largest lattice expansion (Bi2S3-9.7%, where 9.7% represents the lattice expansion) exhibits a greater electrocatalytic hydrogen evolution reaction (HER) activity compared to Bi2S3 and Bi2S3-3.2%. Density functional theory calculations reveal the expansion of the lattice spacing reduces the bandwidth and upshifts the band center of the Bi 3d orbits, facilitating electron exchange with the S 2p orbits. The resultant intrinsic electronic configuration exhibits favorable H adsorption kinetics and a reduced energy barrier for water dissociation in hydrogen evolution. Operando Raman and post-mortem characterizations using XRD and X-ray photoelectron spectroscopy reveal the generation of pseudo-amorphous Bi at the edge of Bi2S3 nanorods of the sample with lattice strain during HER, yielding Bi2S3-9.7%-A. It is worth noting when Bi2S3-9.7%-A is assembled as a positive electrode in an asymmetric supercapacitor, its performance is greatly superior to that of the same device formed using pristine Bi2S3-9.7%. The as-prepared Bi2S3-9.7%-A//activated carbon asymmetric supercapacitor achieves a high specific capacitance of 307.4 F g−1 at 1 A g−1, exhibiting high retention of 84.1% after 10 000 cycles.
AU  - Zhang,H
AU  - Diao,J
AU  - Ouyang,M
AU  - Yadegari,H
AU  - Mao,M
AU  - Wang,J
AU  - Henkelman,G
AU  - Xie,F
AU  - Riley,DJ
DO  - 10.1002/adfm.202205974
EP  - 12
PY  - 2022///
SN  - 1616-301X
SP  - 1
TI  - Enhancing the performance of Bi2S3 in electrocatalytic and supercapacitor applications by controlling lattice strain
T2  - Advanced Functional Materials
UR  - http://dx.doi.org/10.1002/adfm.202205974
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000856974700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adfm.202205974
UR  - http://hdl.handle.net/10044/1/100052
VL  - 32
ER  -
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