Journal
NANOSCALE
Volume 12, Issue 7, Pages 4719-4728Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr09608f
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Funding
- Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors
- National Natural Science Foundation of China [21475088]
- Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Engineering Research Center of Green Energy Chemical Engineering [18DZ2254200]
- International Joint Laboratory on Resource Chemistry (IJLRC)
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The design and fabrication of economically viable anode catalysts for the methanol oxidation reaction (MOR) have been challenging issues in direct methanol fuel cells (DMFCs) over the decades. In this work, a composite electrochemical catalyst of Pd-coupled Ag and ZnO for the possible replacement of expensive Pt catalysts in DMFCs is successfully prepared. The as-made Pd@Ag/ZnO exhibits specific activity, which is 1.8-fold, 2.8-fold, and 4.6-fold higher than that of a Pd/ZnO catalyst, 20% Pd/C catalyst and Pd black, respectively. The improvement of the catalytic mechanism is likely due to the synergistic interaction between Pd@Ag and ZnO. The density functional theory (DFT) calculation results confirm that Ag doped into Pd weakens the adsorption of CO, dramatically improving the capability to resist CO poisoning.
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