Methanol Oxidation on Graphenic-Supported Platinum Catalysts
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of Graphene Oxide
2.2. Synthesis of Reduced Graphene Oxide Materials
2.3. Synthesis of Pt/C, Pt/N-rGO, and Pt/rGO Catalysts
2.4. Physicochemical Characterization
2.5. Electrochemical Characterization
3. Results and Discussion
3.1. Physicochemical Characterization
3.2. Electrochemical Characterization
4. Conclusions
Supplementary Materials
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Catalyst | Positionhkl 2θ/° | dhkl/nm | Number of Layers | Pt Crystallite Size/nm |
---|---|---|---|---|
Graphite | 26.5 C(002) | 0.34 C(002) | 121 | - |
GO | 10.7 C(002) | 0.82 C(002) | 11 | |
Vulcan | 24.7 C(002) | 0.36 C(002) | 6 | |
rGO-TT | 25.2 C(002) | 0.35 C(002) | 12 | |
N-rGO | 25.3 C(002) | 0.35 C(002) | 9 | |
Pt/C | 67.4 Pt(220) | 0.23 Pt(111) | - | 2.3 |
Pt/rGO-TT | 67.5 Pt(220) | 0.23 Pt(111) | - | 2.4 |
Pt/N-rGO | 67.6 Pt(220) | 0.23 Pt(111) | - | 2.0 |
Composition (% Weight) | |||
---|---|---|---|
Material | C | O | N * |
Graphite | 80.0 | 20.0 | |
Carbon | 96.5 | 3.5 | - |
GO | 48.0 | 52.0 | - |
rGO-TT | 75.3 | 24.7 | - |
N-rGO | 73.0 | 21.0 | 6.0 |
Pt/C | 96.4 | 3.6 | - |
Pt/rGO-TT | 86.9 | 13.1 | - |
Pt/N-rGO | 78.3 | 15.7 | 6.0 |
Elements | Pt4f | C1s | O1s | |||||
---|---|---|---|---|---|---|---|---|
Catalysts | ||||||||
Pt/C | Pt0 | 71.5 (62) | C–C | 284.6 (81) | Pt oxides | 530 (5) | ||
Pt2+ | 72.4 (31) | C–N | - | O=C | 531.1 (10) | |||
Pt4+ | 73.5 (7) | C–OH | 285.8 (14) | OH–C | 532.8 (72) | |||
C=O | 287 (4) | O–C=O | 534.1 (13) | |||||
O–C=O | 289.1 (1) | H2O | - 530 (3) | |||||
Pt/rGO-TT | Pt0 | 71.2 (63) | C–C | 284.6 (68) | Pt oxides | |||
Pt2+ | 72.3 (30) | C–N | - | O=C | 531.2 (23) | |||
Pt4+ | 74.3 (7) | C–OH | 285.8 (15) | OH–C | 532.9 (58) | |||
C=O | 287 (10) | O–C=O | 533.9 (9) | |||||
O–C=O | 288.7 (7) | H2O | 535.2 (7) | |||||
Pt/N-rGO | Pt0 | 71.2 (49) | C–C | 284.5 (52) | Pt oxides | 530.1 (4) | ||
Pt2+ | 72.1 (42) | C–N | 285.3 (14) | O=C | 531.2 (33) | N1s | ||
Pt4+ | 74.0 (10) | C–OH | 285.9 (12) | OH–C | 532.7 (48) | Pyridinic | 398.7 (29) | |
C=O | 287.1 (12) | O–C=O | 534 (12) | Pyrrolic | 400.2 (49) | |||
O–C=O | 288.5 (10) | H2O | 535 (2) | Quaternary | 401.2 (22) | |||
π–π | 290.0 (2) | - | - | - | - |
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Arteaga, G.; Rivera-Gavidia, L.M.; Martínez, S.J.; Rizo, R.; Pastor, E.; García, G. Methanol Oxidation on Graphenic-Supported Platinum Catalysts. Surfaces 2019, 2, 16-31. https://doi.org/10.3390/surfaces2010002
Arteaga G, Rivera-Gavidia LM, Martínez SJ, Rizo R, Pastor E, García G. Methanol Oxidation on Graphenic-Supported Platinum Catalysts. Surfaces. 2019; 2(1):16-31. https://doi.org/10.3390/surfaces2010002
Chicago/Turabian StyleArteaga, Gladys, Luis M. Rivera-Gavidia, Sthephanie J. Martínez, Rubén Rizo, Elena Pastor, and Gonzalo García. 2019. "Methanol Oxidation on Graphenic-Supported Platinum Catalysts" Surfaces 2, no. 1: 16-31. https://doi.org/10.3390/surfaces2010002