TY - JOUR
T1 - Pt-Based Nanostructures for Electrochemical Oxidation of CO
T2 - Unveiling the Effect of Shapes and Electrolytes
AU - Abdelgawad, Ahmed
AU - Salah, Belal
AU - Eid, Kamel
AU - Abdullah, Aboubakr M.
AU - Al-Hajri, Rashid S.
AU - Al-Abri, Mohammed
AU - Hassan, Mohammad K.
AU - Al-Sulaiti, Leena A.
AU - Ahmadaliev, Doniyorbek
AU - Ozoemena, Kenneth I.
N1 - Funding Information:
This work was supported by (i) the Qatar National Research Fund (QNRF, a member of the Qatar Foundation) through a National Priority Research Program Grant (NPRP) NPRP13S-0117-200095 and (ii) Qatar University through a High Impact Grant, QUHI-CAM-22/23-550. This work is also supported by Sultan Qaboos University and OmanTel (EG/SQU-OT/22/01).
Publisher Copyright:
© 2022 by the authors.
PY - 2022/12
Y1 - 2022/12
N2 - Direct alcohol fuel cells are deemed as green and sustainable energy resources; however, CO-poisoning of Pt-based catalysts is a critical barrier to their commercialization. Thus, investigation of the electrochemical CO oxidation activity (COOxid) of Pt-based catalyst over pH ranges as a function of Pt-shape is necessary and is not yet reported. Herein, porous Pt nanodendrites (Pt NDs) were synthesized via the ultrasonic irradiation method, and its CO oxidation performance was benchmarked in different electrolytes relative to 1-D Pt chains nanostructure (Pt NCs) and commercial Pt/C catalyst under the same condition. This is a trial to confirm the effect of the size and shape of Pt as well as the pH of electrolytes on the COOxid. The COOxid activity and durability of Pt NDs are substantially superior to Pt NCs and Pt/C in HClO4, KOH, and NaHCO3 electrolytes, respectively, owing to the porous branched structure with a high surface area, which maximizes Pt utilization. Notably, the COOxid performance of Pt NPs in HClO4 is higher than that in NaHCO3, and KOH under the same reaction conditions. This study may open the way for understanding the COOxid activities of Pt-based catalysts and avoiding CO-poisoning in fuel cells.
AB - Direct alcohol fuel cells are deemed as green and sustainable energy resources; however, CO-poisoning of Pt-based catalysts is a critical barrier to their commercialization. Thus, investigation of the electrochemical CO oxidation activity (COOxid) of Pt-based catalyst over pH ranges as a function of Pt-shape is necessary and is not yet reported. Herein, porous Pt nanodendrites (Pt NDs) were synthesized via the ultrasonic irradiation method, and its CO oxidation performance was benchmarked in different electrolytes relative to 1-D Pt chains nanostructure (Pt NCs) and commercial Pt/C catalyst under the same condition. This is a trial to confirm the effect of the size and shape of Pt as well as the pH of electrolytes on the COOxid. The COOxid activity and durability of Pt NDs are substantially superior to Pt NCs and Pt/C in HClO4, KOH, and NaHCO3 electrolytes, respectively, owing to the porous branched structure with a high surface area, which maximizes Pt utilization. Notably, the COOxid performance of Pt NPs in HClO4 is higher than that in NaHCO3, and KOH under the same reaction conditions. This study may open the way for understanding the COOxid activities of Pt-based catalysts and avoiding CO-poisoning in fuel cells.
KW - CO oxidation
KW - Pt porous nanodendrites
KW - effect of shape
KW - effect of size
KW - electrolyte effect
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U2 - 10.3390/ijms232315034
DO - 10.3390/ijms232315034
M3 - Article
C2 - 36499359
AN - SCOPUS:85143729898
SN - 1661-6596
VL - 23
JO - International Journal of Molecular Sciences
JF - International Journal of Molecular Sciences
IS - 23
M1 - 15034
ER -