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:2021:10.1002/adfm.202106835,
author = {Zhang, H and Li, P and Chen, S and Xie, F and Riley, DJ},
doi = {10.1002/adfm.202106835},
journal = {Advanced Functional Materials},
title = {Anodic transformation of a core-shell Prussian Blue analogue to a bifunctional electrocatalyst for water splitting},
url = {http://dx.doi.org/10.1002/adfm.202106835},
volume = {31},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Developing low-cost oxygen evolution reaction (OER) catalysts with high efficiency and understanding the underlying reaction mechanism are critical for electrochemical conversion technologies. Here, an anodized Prussian blue analogue (PBA) containing Ni and Co is reported as a promising OER electrocatalyst in alkaline media. Detailed post-mortem characterizations indicate the transformation from PBA to Ni(OH)2 during the anodic process, with the amorphous shell of the PBA facilitating the transformation by promoting greater structural flexibility. Further study with operando Raman and X-ray photoelectron spectroscopy reveal the increase of anodic potential improves the degree of deprotonation of the transformed core-shell PBA, leading to an increase of Ni valence. Density functional theory calculations suggest that the increase of Ni valence results in a continuous increase in the adsorption strength of oxygen-containing species, exhibiting a volcano relationship against the OER activity. Based on the experiments and calculated results, an OER mechanism for the transformed product is proposed. The fully activated catalyst also works as the cathode and the anode for a water-splitting electrolysis cell with a high output current density of 13.7 mA cm−2 when a cell voltage of 1.6 V applied. No obvious performance attenuation is observed after 40 h of catalysis.
AU  - Zhang,H
AU  - Li,P
AU  - Chen,S
AU  - Xie,F
AU  - Riley,DJ
DO  - 10.1002/adfm.202106835
PY  - 2021///
SN  - 1616-301X
TI  - Anodic transformation of a core-shell Prussian Blue analogue to a bifunctional electrocatalyst for water splitting
T2  - Advanced Functional Materials
UR  - http://dx.doi.org/10.1002/adfm.202106835
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000691570100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adfm.202106835
UR  - http://hdl.handle.net/10044/1/91688
VL  - 31
ER  -
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