TY - JOUR
T1 - Enhanced activity observed for sulfuric acid and chlorosulfuric acid functionalized carbon black as PtRu and PtSn electrocatalyst support for DMFC and DEFC applications
AU - Carmo, Marcelo
AU - Brandalise, Michele
AU - Neto, Almir Oliveira
AU - Spinacé, Estevam V.
AU - Taylor, André D.
AU - Linardi, Marcelo
AU - Rocha Poo, João Guilherme
N1 - Funding Information:
The authors thank the “ Instituto de Pesquisas Tecnológicas do Estado de São Paulo – IPT”, the “ Instituto de Pesquisas Energéticas e Nucleares – IPEN”, the “ Coordenadoria de Aperfeicoamento Pessoal – CAPES” and the “ Financiadora de Estudos e Projetos – FINEP” for financial assistance given to this project.
PY - 2011/11
Y1 - 2011/11
N2 - In this study, carbon black Vulcan XC72 was successfully functionalized in an autoclave with sulfuric acid (SA) and Chlorosulfuric acid (C-SA). The functionalized carbons were then used as supports to prepare PtRu/C and PtSn/C electrocatalysts by an alcohol-reduction process. Physical characterization was performed by BET, LS, XRD, EDX, and TEM. The electrochemical characterization showed that the catalysts supported on functionalized carbons exhibited better performance for alcohol oxidation if compared to those using unfunctionalized supports. The observed better performance can be mainly attributed to the easier access with protons (higher ionic transport), better wettability (higher water uptake), and better distribution of the nanoparticles over the support (higher platinum utilization); indicating that sulfonation is an efficient approach to functionalize, improve performance, and reduce costs of fuel cell catalysts.
AB - In this study, carbon black Vulcan XC72 was successfully functionalized in an autoclave with sulfuric acid (SA) and Chlorosulfuric acid (C-SA). The functionalized carbons were then used as supports to prepare PtRu/C and PtSn/C electrocatalysts by an alcohol-reduction process. Physical characterization was performed by BET, LS, XRD, EDX, and TEM. The electrochemical characterization showed that the catalysts supported on functionalized carbons exhibited better performance for alcohol oxidation if compared to those using unfunctionalized supports. The observed better performance can be mainly attributed to the easier access with protons (higher ionic transport), better wettability (higher water uptake), and better distribution of the nanoparticles over the support (higher platinum utilization); indicating that sulfonation is an efficient approach to functionalize, improve performance, and reduce costs of fuel cell catalysts.
KW - Carbon black functionalization
KW - Chlorosulfuric acid
KW - Direct alcohol fuel cells
KW - Direct ethanol fuel cell
KW - Direct methanol fuel cell
KW - Sulfuric acid
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U2 - 10.1016/j.ijhydene.2011.08.031
DO - 10.1016/j.ijhydene.2011.08.031
M3 - Article
AN - SCOPUS:80054011023
SN - 0360-3199
VL - 36
SP - 14659
EP - 14667
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 22
ER -