The high reactivity of methanol with platinum and the excellent catalytic activity for electro-oxidation of methanol on pure Pt especially at low temperature (below 80°C), makes this metal a suitable anodic electrocatalyst in DMFC [1]. However, it is well known that there is a series of technical problems in DMFC that limit their marketing [2]. While Pt, which is generally supported on activated carbon with large surface area such as Vulcan XC-72, is the best catalyst for the electro-oxidation of methanol, it rapidly becomes poisoned because of the intermediate species formed during the oxidation of methanol, mainly CO, since CO molecules can be chemically adsorbed on the surface of Pt and block the active sites, producing a poor kinetic of anodic methanol oxidation due to CO poisoning and a low electrocatalytic activity of electrocatalysts [3-5]. Although electrocatalysts based on Pt and Pt-Ru alloy have shown a good catalytic activity for electro-oxidation of methanol, another of the limitations in the development of DMFC for commercial applications is the high cost of both noble metals [6-7]. In this study, we report a nanocasting method of low cost to prepare NC using SBA-15 as hard template and purified sugar as carbon precursor; the inclusion of Co as a second metal, in order to reduce the amount of platinum and measure its catalytic activity in methanol oxidation process

1. ACADÉMIA MEXICANA DE CATÁLISIS A.C.
14th MEXICAN CONGRESS OF CATALYSIS
5th INTERNATIONAL CONGRESS OF CATALYSIS
“Electrocatalytic Evaluation in Methanol Oxidation
Process of PtCo Nanoparticles Supported by
Nanostructured Carbon”
David Macías Ferrer
J.A. Melo-Banda, J.Y. Verde-Gómez, R. Silva-Rodrigo, P. del Ángel-
Vicente, M. Lam-Maldonado
VALLE DE BRAVO, EDO DE MÉXICO, MÉXICO APRIL 2015

2. SYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALS
STEP 1STEP 1
SBA-15 (Hard Template)
NC (Nanostructured Carbon)
STEP 2STEP 2 PtCo/NC (Electrocatalyst)

3. STEP 1STEP 1
SBA-15 (Hard Template)
NC (Nanostructured Carbon)
SYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALS
STEP 2STEP 2 PtCo/NC (Electrocatalyst)
Zhao, D., et. al. Science, (1998); 279: 548
ABET = 872 m2/g; DP = 7.8 nm
Method: Sol-Gel

4. STEP 1STEP 1
SBA-15 (Hard Template)
NC (Nanostructured Carbon)
SYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALS
STEP 2STEP 2 PtCo/NC (Electrocatalyst)
Ryoo R., Joo S.H., Jun S., J. Phys. Chem. B, (1999); 103: 7743-7746
ABET = 1010 m2/g; DP = 3.8 nm
Method: Pyrolysis

5. STEP 1STEP 1
SBA-15 (Hard Template)
NC (Nanostructured Carbon)
SYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALSSYNTHESIS OF MATERIALS
STEP 2STEP 2 PtCo/NC (Electrocatalyst)
Wei W., et. al., Chin J Catal, (2007); 28(1): 17–21.
ABET = 304 m2/g; DP = 3.8 nm
Method: Sequential Impregnation

6. PRECURSOR SALTSPRECURSOR SALTS
Platinum
Acetylacetonate
Pt(acac)2
Cobalt Nitrate
hexahydrate
Co(NO3)2*6H2O
CHEMICAL REAGENTSCHEMICAL REAGENTSCHEMICAL REAGENTSCHEMICAL REAGENTS

7. CHEMICAL AGENTSCHEMICAL AGENTS
CHEMICAL REAGENTSCHEMICAL REAGENTSCHEMICAL REAGENTSCHEMICAL REAGENTS
Ammonium
Hydroxide
NH4(OH)
Acetone
CH3(CO)CH3
Sodium
Borohydride
NaBH4
Citric Acid
C6H8O7

8. METHODOLOGYMETHODOLOGYMETHODOLOGYMETHODOLOGY
NC
Vacuum drying
Ultrasonication
Adding reducing
agents
SBA-15
Heat annealing
Precursor salts
of Pt or Co
Mechanical stirring
Washing and
filtering
Pt/NC
PtCo/NC
STEP 1STEP 1

9. SBASBA--1515
SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY

10. SBASBA--1515
SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY

11. SBASBA--1515
SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY

12. NCNC
SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY

13. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
NCNC

14. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
NCNC

15. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
NCNC

16. NANOSTRUCTURED CARBONNANOSTRUCTURED CARBON
RAMAN SPECTROSCOPYRAMAN SPECTROSCOPYRAMAN SPECTROSCOPYRAMAN SPECTROSCOPY

17. PtCoPtCo/NC/NC
XRD ANALYSISXRD ANALYSISXRD ANALYSISXRD ANALYSIS
CristalliteCristallite sizesize
5.07 nm5.07 nm
2 max
0.9
cos
d
B 



Scherrer’sScherrer’s EquationEquation

18. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
PtCoPtCo/NC/NC

19. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
PtCoPtCo/NC/NC
Particle sizeParticle size
4.1 nm4.1 nm

20. SCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPYSCANING ELECTRON MICROSCOPY
PtCoPtCo/NC/NC
Particle sizeParticle size
5.07 nm5.07 nm

21. PtCoPtCo/NC/NC
RAMAN SPECTROSCOPYRAMAN SPECTROSCOPYRAMAN SPECTROSCOPYRAMAN SPECTROSCOPY

22. PtCoPtCo/NC/NC
CYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRY
ONSET POTENTIALONSET POTENTIAL
ELECTROLITE:
0.5M H2SO4 + 0.5M MeOH
SCAN RATE:
30 mV/s
CYCLE NUMBER:
10
POTENTIAL WINDOW:
-0.2 V a 1.0 V

23. PtCoPtCo/NC/NC
CYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRY
POTENTIAL IN FORWARD SCAN AT MAXIMUM OXIDATION PEAK OF METHANOLPOTENTIAL IN FORWARD SCAN AT MAXIMUM OXIDATION PEAK OF METHANOL
ELECTROLYTE:
0.5M H2SO4 + 0.5M MeOH
SCAN RATE:
30 mV/s
CYCLE NUMBER:
10
POTENTIAL WINDOW:
-0.2 V a 1.0 V

24. PtCoPtCo/NC/NC
CYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRY
MASS ACTIVITYMASS ACTIVITY
ELECTROLYTE:
0.5M H2SO4 + 0.5M MeOH
SCAN RATE:
30 mV/s
CYCLE NUMBER:
10
POTENTIAL WINDOW:
-0.2 V a 1.0 V

25. PtCoPtCo/NC/NC
CYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRYCYCLIC VOLTAMMETRY
INDEX OF TOLERANCE OF CO POISONINGINDEX OF TOLERANCE OF CO POISONING IIff//IIbb
ELECTROLYTE:
0.5M H2SO4 + 0.5M MeOH
SCAN RATE:
30 mV/s
CYCLE NUMBER:
10
POTENTIAL WINDOW:
-0.2 V a 1.0 V

26. CHRONOAMPEROMETRYCHRONOAMPEROMETRYCHRONOAMPEROMETRYCHRONOAMPEROMETRY
PtCoPtCo/NC/NC

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