Metal Phosphate-Supported Pt Catalysts for CO Oxidation
Abstract
:1. Introduction
2. Results and Discussion
2.1. Catalytic Activity of Pt/M-P-O
2.2. BET Surface Areas and Pt Contents
2.3. XRD Characterization
2.4. TEM Characterization
2.5. CO2-TPD
Catalyst | T50 (°C) | SBET (m2/g) | Pt content (%) | Average Pt particle size (nm) | Basic sites (μmol/g) | O1s (%) | ||
---|---|---|---|---|---|---|---|---|
OB | ONB | OOH | ||||||
Pt/Mg-P-O | 140 | 24.4 | 0.49 | 2–5, some are very big | 26.6 | 29.8 | 57.0 | 13.2 |
Pt/Al-P-O | 178 | 5.2 | 1.35 | 2–3 | 9.1 | 30.2 | 61.2 | 8.6 |
Pt/Ca-P-O | 76 | 47.1 | 0.85 | 2–3 | 76.8 | 16.6 | 45.5 | 37.9 |
Pt/Fe-P-O | 120 | 8.7 | 1.42 | 2–5, some are big (10 nm) | 0 | 29.6 | 57.1 | 13.3 |
Pt/Co-P-O | 107 | 7.7 | 1.43 | 2–5, some are big (10 nm) | 1.3 | 35.1 | 52.1 | 12.8 |
Pt/Zn-P-O | 202 | <1 | 1.23 | very big | 0 | 20.1 | 66.8 | 13.1 |
Pt/La-P-O | 123 | 71.3 | 1.45 | 2–3 | 147.9 | 32.2 | 59.0 | 8.8 |
2.6. XPS Characterization
Sample | Ca/P | Pt0/Pttotal | Pt2+/Pttotal | Pt4+/Pttotal | OOH (%) | Cl/Pt |
---|---|---|---|---|---|---|
Pt/Ca-P-O-calcined | 1.29 | 0 | 0.092 | 0.908 | 30.1 | 1.39 |
Pt/Ca-P-O-pre H2 | 1.29 | 0.338 | 0.495 | 0.167 | 46.1 | 1.26 |
Pt/Ca-P-O-spent | 1.38 | 0.272 | 0.517 | 0.211 | 37.9 | 1.22 |
2.7. Discussion
3. Experimental Section
3.1. Synthesis of Catalysts
3.2. Characterization
3.3. Catalytic Testing
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Qian, X.; Qin, H.; Meng, T.; Lin, Y.; Ma, Z. Metal Phosphate-Supported Pt Catalysts for CO Oxidation. Materials 2014, 7, 8105-8130. https://doi.org/10.3390/ma7128105
Qian X, Qin H, Meng T, Lin Y, Ma Z. Metal Phosphate-Supported Pt Catalysts for CO Oxidation. Materials. 2014; 7(12):8105-8130. https://doi.org/10.3390/ma7128105
Chicago/Turabian StyleQian, Xiaoshuang, Hongmei Qin, Tao Meng, Yi Lin, and Zhen Ma. 2014. "Metal Phosphate-Supported Pt Catalysts for CO Oxidation" Materials 7, no. 12: 8105-8130. https://doi.org/10.3390/ma7128105