TY - JOUR
T1 - In situ shaped PtPd nanocubes on common carbon powder for efficient methanol electrooxidation in practical fuel cells
AU - Li, Weicong
AU - Bhuvanendran, Narayanamoorthy
AU - Liu, Huiyuan
AU - Zhang, Weiqi
AU - Hooshyari, Khadijeh
AU - Lee, Sae Youn
AU - Xu, Qian
AU - Su, Huaneng
N1 - Publisher Copyright:
© 2023 Hydrogen Energy Publications LLC
PY - 2024/1/2
Y1 - 2024/1/2
N2 - Platinum-group-metal-based polyhedral nanostructures generally possess high catalytic activity for electrochemical reactions owing to their numerous edges, corners, and well-defined lattice planes. However, their direct synthesis on common carbon powder is difficult, which considerably hinders their applications in practical devices. Herein, we report PtPd nanocubes (NCs) grown in situ on commercial carbon powder (Vulcan XC-72R) using a facile one-pot method. The as-prepared PtPd NCs/C (∼20 wt% metal) possess Pt-enriched surfaces, enabling the mass activity (MA) of methanol oxidation reaction (MOR) up to 1.77 A mgPt−1, which is 3.34/3.69 times that of commercial PtRu/C and Pt/C, respectively. With an average size of 8–10 nm, the PtPd NCs/C exhibit high stability, retaining over 80% initial MA against MOR in an accelerated durability test. For practical direct-methanol fuel cell (DMFC) operation, the PtPd NC/C as an anode catalyst delivered a maximum power density of 0.232 W cm−2 with high-concentration methanol (10 M) flow, which is 1.6 times higher than that for commercial PtRu/C under the same conditions. Moreover, the PtPd NCs/C demonstrated excellent durability for DMFC operation with much lower voltage decay than commercial PtRu/C, indicating its excellent potential for practical DMFC applications.
AB - Platinum-group-metal-based polyhedral nanostructures generally possess high catalytic activity for electrochemical reactions owing to their numerous edges, corners, and well-defined lattice planes. However, their direct synthesis on common carbon powder is difficult, which considerably hinders their applications in practical devices. Herein, we report PtPd nanocubes (NCs) grown in situ on commercial carbon powder (Vulcan XC-72R) using a facile one-pot method. The as-prepared PtPd NCs/C (∼20 wt% metal) possess Pt-enriched surfaces, enabling the mass activity (MA) of methanol oxidation reaction (MOR) up to 1.77 A mgPt−1, which is 3.34/3.69 times that of commercial PtRu/C and Pt/C, respectively. With an average size of 8–10 nm, the PtPd NCs/C exhibit high stability, retaining over 80% initial MA against MOR in an accelerated durability test. For practical direct-methanol fuel cell (DMFC) operation, the PtPd NC/C as an anode catalyst delivered a maximum power density of 0.232 W cm−2 with high-concentration methanol (10 M) flow, which is 1.6 times higher than that for commercial PtRu/C under the same conditions. Moreover, the PtPd NCs/C demonstrated excellent durability for DMFC operation with much lower voltage decay than commercial PtRu/C, indicating its excellent potential for practical DMFC applications.
KW - Direct methanol fuel cell
KW - In-situ preparation
KW - Methanol oxidation reaction
KW - PtPd nanocubes
UR - http://www.scopus.com/inward/record.url?scp=85166936137&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2023.07.234
DO - 10.1016/j.ijhydene.2023.07.234
M3 - Article
AN - SCOPUS:85166936137
SN - 0360-3199
VL - 50
SP - 1496
EP - 1506
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -