High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction

Dragos-Pinzaru, Oana-Georgiana; Buema, Gabriela; Racila, Luiza; Ababei, Gabriel; Borza, Firuta; Stoian, George; Tabakovic, Ibro; Lupu, Nicoleta

doi:10.3390/nano14070599

Open AccessArticle

High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction

by

Oana-Georgiana Dragos-Pinzaru

¹,

Gabriela Buema

^1,*,

Luiza Racila

^1,*,

Gabriel Ababei

¹

,

Firuta Borza

¹,

George Stoian

¹

,

Ibro Tabakovic

² and

Nicoleta Lupu

¹

National Institute of R&D for Technical Physics, 700050 Iasi, Romania

²

Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55435, USA

^*

Authors to whom correspondence should be addressed.

Nanomaterials 2024, 14(7), 599; https://doi.org/10.3390/nano14070599

Submission received: 11 March 2024 / Revised: 26 March 2024 / Accepted: 27 March 2024 / Published: 28 March 2024

(This article belongs to the Special Issue Catalytic Nanomaterials for Environmental Protection and Sustainable Development)

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Abstract

In this study, we report the influence of the Pt concentration in Co_xPt_100−x alloys on the catalytic activity of the alloys for 4-nitrophenol (4-NP) reduction. More precisely, a series of Co_xPt_100−x alloys with a Pt concentration ranging between 60% and 95% were prepared using electrodeposition at controlled potentials from stable hexachloroplatinate aqueous solution. The Pt concentration was tuned by varying the electrodeposition potential from −0.6 to −0.9 V. The changes in the Co_xPt_100−x alloy microstructure and crystalline structure have been investigated using SEM and TEM analysis. Our results show that the microstructure and the crystalline structure of the as-prepared materials do not depend on the electrodeposition potential. However, the catalytic activity of Co_xPt_100−x alloys is closely correlated with the potential applied during electrochemical synthesis, hence the Pt content. We demonstrated that the synthesized materials present a high catalytic activity (approx. 90%) after six cycles of reusability despite the fact that the Pt content of the as-prepared alloys decreases. The easy preparation method that guarantees more than 97% catalytic activity of the Co_xPt_100−x alloys, the easy recovery from solution, and the possibility of reusing the Co_xPt_100−x alloys are the benefits of the present study.

Keywords: Co_xPt_100−x alloys; catalytic activity; 4-nitrophenol reduction; water treatment

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MDPI and ACS Style

Dragos-Pinzaru, O.-G.; Buema, G.; Racila, L.; Ababei, G.; Borza, F.; Stoian, G.; Tabakovic, I.; Lupu, N. High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction. Nanomaterials 2024, 14, 599. https://doi.org/10.3390/nano14070599

AMA Style

Dragos-Pinzaru O-G, Buema G, Racila L, Ababei G, Borza F, Stoian G, Tabakovic I, Lupu N. High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction. Nanomaterials. 2024; 14(7):599. https://doi.org/10.3390/nano14070599

Chicago/Turabian Style

Dragos-Pinzaru, Oana-Georgiana, Gabriela Buema, Luiza Racila, Gabriel Ababei, Firuta Borza, George Stoian, Ibro Tabakovic, and Nicoleta Lupu. 2024. "High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction" Nanomaterials 14, no. 7: 599. https://doi.org/10.3390/nano14070599

APA Style

Dragos-Pinzaru, O.-G., Buema, G., Racila, L., Ababei, G., Borza, F., Stoian, G., Tabakovic, I., & Lupu, N. (2024). High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction. Nanomaterials, 14(7), 599. https://doi.org/10.3390/nano14070599

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High Catalytic Activity of Co_xPt_100−x Alloys for Phenolic Compound Reduction

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