Intermetallic Compound and Solid Solutions of Co75Me25 (Me: Si, Fe, Cr) as Catalysts for the Electrochemical Reaction of Nitrate Conversion to Ammonia

Intermetallic Compound and Solid Solutions of Co75Me25 (Me: Si, Fe, Cr) as Catalysts for the Electrochemical Reaction of Nitrate Conversion to Ammonia Научная публикация

Журнал

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

Вых. Данные

Год: 2025, Том: 26, Номер: 4, Номер статьи : 1650, Страниц : DOI: 10.3390/ijms26041650

Авторы

Kuznetsova Irina ¹ , Kultin Dmitry ¹ , Lebedeva Olga ¹ , Nesterenko Sergey ¹ , Murashova Elena ¹ , Kustov Leonid ^1,2

Организации

1	Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
2	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia

A sustainable reaction of electrocatalytic nitrate conversion in ammonia production (NO3RR) occurring under ambient conditions is currently of prime interest, as well as urgent research due to the real potential replacement of the environmentally unfavorable Haber–Bosch process. Herein, a series of electrocatalysts based on two-component cobalt alloys was synthesized using low-cost non-noble metals Co, Fe, Cr, and also Si. The samples of electrocatalysts were characterized and studied by the following methods: SEM, EDX, XRD (both transmission and reflection), UV–VIS spectroscopy, optical microscopy, linear (and cyclic) voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Beyond that, the determination of electrochemically active surface area was also carried out for all samples of electrocatalysts. Unexpectedly, the sample having an intermetallic compound (IMC) of the composition Co2Si turned out to be the most highly effective. The highest Faradaic efficiency (FE) of 80.8% at E = −0.585 V (RHE) and an ammonia yield rate of 22.3 µmol h−1 cm−2 at E = −0.685 V (RHE) indicate the progressive role of IMC as the main active component of the electrocatalyst. Thus, this study demonstrates the promise and enormous potential of IMC as the main component of highly efficient electrocatalysts for NO3RR. This work can serve primarily as a starting point for future studies of electrocatalytic conversion reactions in the production of ammonia using IMC catalysts containing non-noble metals.

Kuznetsova I. , Kultin D. , Lebedeva O. , Nesterenko S. , Murashova E. , Kustov L.
Intermetallic Compound and Solid Solutions of Co75Me25 (Me: Si, Fe, Cr) as Catalysts for the Electrochemical Reaction of Nitrate Conversion to Ammonia
International Journal of Molecular Sciences. 2025. V.26. N4. 1650 . DOI: 10.3390/ijms26041650 WOS Scopus OpenAlex

Web of science:	WOS:001431530200001
Scopus:	2-s2.0-85218889794
OpenAlex:	W4407578950

БД	Цитирований
OpenAlex	3
Web of science	3
Scopus	3