Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticle-Based Bimetallic Electrocatalyst

Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticle-Based Bimetallic Electrocatalyst Full article

Journal

International Journal of Molecular Sciences
ISSN: 1661-6596 , E-ISSN: 1422-0067

Output data

Year: 2024, Volume: 25, Number: 13, Article number : 7089, Pages count : DOI: 10.3390/ijms25137089

Authors

Kuznetsova Irina ¹ , Lebedeva Olga ¹ , Kultin Dmitry ¹ , Mashkin Mikhail ¹ , Kalmykov Konstantin ¹ , Kustov Leonid ^1,2,3

Affiliations

1	Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
2	Institute of Ecology and Engineering, National Science and Technology University "MISiS", Leninsky Prospect 4, Moscow 119049, Russia
3	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia

The green and sustainable electrocatalytic conversion of nitrogen-containing compounds to ammonia is currently in high demand in order to replace the eco-unfriendly Haber–Bosch process. Model catalysts for the nitrate reduction reaction were obtained by electrodeposition of metal Co, Fe, and bimetallic Fe/Co nanoparticles from aqueous solutions onto a graphite substrate. The samples were characterized by the following methods: SEM, XRD, XPS, UV–vis spectroscopy, cyclic (and linear) voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. In addition, the determination of the electrochemically active surface was also performed for all electrocatalysts. The best electrocatalyst was a sample containing Fe-nanoparticles on the layer of Co-nanoparticles, which showed a Faradaic efficiency of 58.2% (E = −0.785 V vs. RHE) at an ammonia yield rate of 14.6 μmol h−1 cm−2 (at ambient condition). An opinion was expressed to elucidate the mechanism of coordinated electrocatalytic action of a bimetallic electrocatalyst. This work can serve primarily as a starting point for future investigations on electrocatalytic conversion reactions to ammonia using model catalysts of the proposed type.

Kuznetsova I. , Lebedeva O. , Kultin D. , Mashkin M. , Kalmykov K. , Kustov L.
Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticle-Based Bimetallic Electrocatalyst
International Journal of Molecular Sciences. 2024. V.25. N13. 7089 . DOI: 10.3390/ijms25137089 WOS Scopus OpenAlex

Web of science:	WOS:001269210200001
Scopus:	2-s2.0-85198424678
OpenAlex:	W4400131657

DB	Citing
OpenAlex	12
Scopus	16
Web of science	15