TY - JOUR
T1 - Direct methanol fuel cells using Se/Ru core/shell cathodes provide high catalytic activity and stability
AU - Shih, Zih Yu
AU - Yang, Zusing
AU - Lin, Zong Hong
AU - Chang, Huan Tsung
PY - 2011/6
Y1 - 2011/6
N2 - We have synthesized Se/Ru core/shell nanoparticles (NPs) as cathode electrocatalysts. By controlling the concentration of RuCl3, we obtained Se/Ru0.2, Se/Ru0.7, and Se/Ru1.1 core/shell NPs. The mass activities of as-prepared catalysts were 58.0, 32.1, and 12.5 A/g, respectively; part of these values are higher than that (2.2 A/g) of a commercial PtRu electrode and those (22.8, 28.0, and 24.5 A/g) of traditional carbon-supported RuxSey electrodes. The Se/Ru1.1 electrode generated the greatest current density and was more tolerant toward poisoning in the presence of 1 M MeOH; cyclic voltammetry measurements revealed that this electrode was stable for at least 100 cycles. This is the first example demonstrating preparation of Se/Ru core/shell NPs that provided excellent catalytic activity and stability toward oxidation of MeOH. With their ease of large-scale preparation, low cost, high electroactivity, and high stability, such Se/Ru core/shell NPs have great potential for use as cathode electrocatalysts in direct MeOH fuel cells.
AB - We have synthesized Se/Ru core/shell nanoparticles (NPs) as cathode electrocatalysts. By controlling the concentration of RuCl3, we obtained Se/Ru0.2, Se/Ru0.7, and Se/Ru1.1 core/shell NPs. The mass activities of as-prepared catalysts were 58.0, 32.1, and 12.5 A/g, respectively; part of these values are higher than that (2.2 A/g) of a commercial PtRu electrode and those (22.8, 28.0, and 24.5 A/g) of traditional carbon-supported RuxSey electrodes. The Se/Ru1.1 electrode generated the greatest current density and was more tolerant toward poisoning in the presence of 1 M MeOH; cyclic voltammetry measurements revealed that this electrode was stable for at least 100 cycles. This is the first example demonstrating preparation of Se/Ru core/shell NPs that provided excellent catalytic activity and stability toward oxidation of MeOH. With their ease of large-scale preparation, low cost, high electroactivity, and high stability, such Se/Ru core/shell NPs have great potential for use as cathode electrocatalysts in direct MeOH fuel cells.
KW - Cathode catalyst
KW - Core/shell structure
KW - Oxygen reduction reaction
KW - Se/Ru core/shell nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=79955917007&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2011.03.032
DO - 10.1016/j.ijhydene.2011.03.032
M3 - 文章
AN - SCOPUS:79955917007
SN - 0360-3199
VL - 36
SP - 7303
EP - 7309
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 12
ER -
