Journal
MATERIALS
Volume 15, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ma15041554
Keywords
electrochemical synthesis; Pd-Pt dendrites; formic acid oxidation; high electrocatalytic performance
Categories
Funding
- National Natural Science Foundation of China [51771134, 51801134, U1601216]
- National Natural Science Foundation for Distinguished Young Scholar [52125404]
- Tianjin Natural Science Foundation for Distinguished Young Scholar [18JCJQJC46500]
- 131 First Level Innovative Talents Training Project in Tianjin, Tianjin Natural Science Foundation [20JCQNJC01130]
- National Natural Science Foundation of Guangdong Province [U1601216]
- National Youth Talent Support Program
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Pd-Pt bimetallic catalysts with dendritic morphology were synthesized on a carbon paper surface using a two-step electrochemical method. These catalysts exhibited enhanced catalytic activity and current density in acidic media, which can be attributed to the atomic defects at the dendrite edges and the high utilization of active sites achieved by the clean electrochemical preparation method.
Pd-Pt bimetallic catalysts with a dendritic morphology were in situ synthesized on the surface of a carbon paper via the facile and surfactant-free two step electrochemical method. The effects of the frequency and modification time of the periodic square-wave potential (PSWP) on the morphology of the Pd-Pt bimetallic catalysts were investigated. The obtained Pd-Pt bimetallic catalysts with a dendritic morphology displayed an enhanced catalytic activity of 0.77 A mg(-1), almost 2.5 times that of the commercial Pd/C catalyst reported in the literature (0.31 A mg(-1)) in acidic media. The enhanced catalytic activity of the Pd-Pt bimetallic catalysts with a dendritic morphology towards formic acid oxidation reaction (FAOR) was not only attributed to the large number of atomic defects at the edges of dendrites, but also ascribed to the high utilization of active sites resulting from the clean electrochemical preparation method. Besides, during chronoamperometric testing, the current density of the dendritic Pd-Pt bimetallic catalysts for a period of 3000 s was 0.08 A mg(-1), even four times that of the commercial Pd/C catalyst reported in the literature (about 0.02 A mg(-1)).
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