High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction
Abstract
:1. Introduction
2. Materials and Methods
2.1. Chemicals
2.2. Synthesis of Materials
2.3. Characterization of Materials
2.4. Catalytic Activity Experiments for 4-NP
3. Results
3.1. CoxPt100−x Thin Layer Microstructure, Composition, Crystalline Structure and Thickness
3.2. Catalytic Activity of P1–P4 Materials for 4-NP Reduction
- The results obtained after 20 min of contact time indicate the same value of the catalytic activity of P1 and P2 materials, 97.61%, while P3 material presents a lower catalytic activity of 92.96%. The catalytic activity presented by P4 material is 88.23%.
- After 30 min, P1 and P2 present a similar catalytic activity to convert 4-NP to 4-AP (98.38% for P1 and 97.81% for P2), while P3 and P4 materials show a slightly different catalytic activity of 94.47% and 91.63%, respectively.
- After 60 min, the catalytic activity of P1 material remains unchanged (98.38%). P2 material shows a slightly higher catalytic activity of 98.35%, while P3 material shows a better catalytic activity of 97.56%. P4 material exhibits a visibly improved catalytic activity after 60 min of contact time compared to 30 min contact time (97.87% vs. 91.63%).
- When comparing the results at different time intervals, it can be observed that a shorter contact time is not favorable for the 4-NP reduction, especially for P4 material. For this synthesized material, the catalytic activity varies considerably with time.
3.2.1. Effect of 4-NP Concentration
- The P1 material presents a maximum catalytic activity of 98.38% after 30 min of contact time, at 10 mM concentration, while at 5 mM concentration the complete reduction of 4NP to 4-AP occurs after a shorter period of 20 min of contact time (97.58%);
- A higher catalytic activity of 98.35% and 97.56% was obtained for P2 and P3 materials at 10 mM concentration, but after a longer contact time of 60 min. The reduction of 4-NP to 4-AP after 20 min of contact time using a concentration of 5 mM is 97.53% (P2) and 97.43% (P3).
3.2.2. Reusability Study of P1, P2, and P3 Materials
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Material | Electrodeposition Potential | Alloy Composition | |
---|---|---|---|
% Co | % Pt | ||
P1 | −0.6 V | 5 | 95 |
P2 | −0.7 V | 10 | 90 |
P3 | −0.8 V | 28 | 72 |
P4 | −0.9 V | 40 | 60 |
Material | Catalytic Activity, % | Reference |
---|---|---|
Palladium nanoparticles supported on maleic anhydride-acylated chitosan (Pd/MAAC) | ~91 | [33] |
Co3O4 nanosheets | 88.84 | [34] |
PdNi bimetallic nanoparticles (NPs) supported on graphite oxide (PdNi/GO) | 74.8 | [35] |
Monometallic Pd/GO | 59.8 | |
FC900 nanosheets | ~70 | [36] |
P1 (Co5Pt95) thin film | 89.3 | This work |
P2 (Co10Pt90) thin film | 90.22 | This work |
P3 (Co28Pt72) thin film | 89.06 | This work |
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Dragos-Pinzaru, O.-G.; Buema, G.; Racila, L.; Ababei, G.; Borza, F.; Stoian, G.; Tabakovic, I.; Lupu, N. High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction. Nanomaterials 2024, 14, 599. https://doi.org/10.3390/nano14070599
Dragos-Pinzaru O-G, Buema G, Racila L, Ababei G, Borza F, Stoian G, Tabakovic I, Lupu N. High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction. Nanomaterials. 2024; 14(7):599. https://doi.org/10.3390/nano14070599
Chicago/Turabian StyleDragos-Pinzaru, Oana-Georgiana, Gabriela Buema, Luiza Racila, Gabriel Ababei, Firuta Borza, George Stoian, Ibro Tabakovic, and Nicoleta Lupu. 2024. "High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction" Nanomaterials 14, no. 7: 599. https://doi.org/10.3390/nano14070599