20.500.12556/RUNG-7905-535deab0-b5c9-2751-fbbe-5114adef8f7c
Highly active iron phosphide catalysts for selective electrochemical nitrate reduction to ammonia
The electrochemical reduction reaction of the nitrate ion (NO3−), a widespread water pollutant, to valuable ammonia (NH3) is a promising approach for environmental remediation and green energy conservation. The development of high-performance electrocatalysts to selectively reduce NO3− wastes into value-added NH3 will open up a different route of NO3− treatment, and impose both environmental and economic impacts on sustainable NH3 synthesis. Transition metal phosphides represent one of the most promising earth-abundant catalysts with impressive electrocatalytic activities. Herein, we report for the first time the electrocatalytic reduction of NO3− using different phases of iron phosphide. Particularly, FeP and Fe2P phases were successfully demonstrated as efficient catalysts for NH3 generation. Detection of the in-situ formed product was achieved using electrooxidation of NH3 to nitrogen (N2) on a Pt electrode. The Fe2P catalyst exhibits the highest Faradaic efficiency (96 %) for NH3 generation with a yield (0.25 mmol h−1 cm-−2 or 2.10 mg h−1 cm−2) at − 0.55 V vs. reversible hydrogen electrode (RHE). The recycling tests confirmed that Fe2P and FeP catalysts exhibit excellent stability during the NO3− reduction at − 0.37 V vs. RHE. To get relevant information about the reaction mechanisms and the fundamental origins behind the better performance of Fe2P, density functional theory (DFT) calculations were performed. These results indicate that the Fe2P phase exhibits excellent performance to be deployed as an efficient noble metal-free catalyst for NH3 generation.
iron phosphide
electrocatalysts
nitrates reduction ammonia
DFT calculations
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true
false
Angleški jezik
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2023-02-02 10:31:57
2023-02-02 12:13:28
2024-03-26 15:01:41
0000-00-00 00:00:00
2023
0
0
str. 1-11
no. 2, [article no.] 109275
Vol. 11
Apr. 2023
0000-00-00
Zaloznikova
Objavljeno
NiDoloceno
0000-00-00
0000-00-00
2023-04-01
140447235
54
2213-3437
10.1016/j.jece.2023.109275
URN:SI:UNG:REP:BRFWNGNK
RAZ_Chouki_Takwa_i2023.pdf
RAZ_Chouki_Takwa_i2023.pdf
1
619C2A026ADD32419D380440031BA0D4
3b8b9f69f6e142001b76391c1b4a73d95c17257f275108e160ffdeacc4fed62a
4b122978-05d0-11ee-9c48-5ef991fed68f
https://repozitorij.ung.si/Dokument.php?lang=slv&id=25517
https://www.sciencedirect.com/science/article/pii/S2213343723000143
1
c5b75143-9d80-11ee-b6b5-5ef991fed68f
https://repozitorij.ung.si/Dokument.php?lang=slv&id=27651
Univerza v Novi Gorici
0
0
0