Co doping promotes the alkaline overall seawater electrolysis performance over MnPSe3 nanosheets

Herein, two-dimensional cobalt-doped MnPSe3 nanosheets (CMPS) were constructed, which served as an outstanding bifunctional catalyst for alkaline seawater splitting, i.e., offering the current density of 10 mA cm−2 with applied overpotentials of 59 and 300 mV for the hydrogen evolution reaction (HER...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2023-10, Vol.59 (81), p.12144-12147
Main Authors: Zhang, Hao, Ge Meng, Tianran Wei, Ding, Junyang, Liu, Qian, Luo, Jun, Liu, Xijun
Format: Article
Language:English
Subjects:
Catalytic activity
Electrolysis
Free energy
Hydrogen evolution reactions
Nanosheets
Oxygen evolution reactions
Seawater
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Summary:Herein, two-dimensional cobalt-doped MnPSe3 nanosheets (CMPS) were constructed, which served as an outstanding bifunctional catalyst for alkaline seawater splitting, i.e., offering the current density of 10 mA cm−2 with applied overpotentials of 59 and 300 mV for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. The assembled two-electrode system of CMPS//CMPS also demonstrated excellent catalytic activity (10 mA cm−2, 1.59 V) and can remain stable for more than 100 h. Moreover, the theoretical calculations showed that CMPS features a suitable H* adsorption beneficial for the HER, as well as a lower free energy barrier favorable for the OER.
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc03434h