Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 28, Pages 31309-31318Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c01668
Keywords
PtNi multicubes; Pt-catalyst; methanol oxidation; ethanol fuel cells; nanoarchitectonics
Funding
- Qatar University Grant [QUHI-CAS-19/20-1]
- National Key Research and Development Program of China [2016YFA0201300]
- National Natural Science Foundation of China [21675148, 21874126]
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Multidimensional bimetallic Pt-based nanoarchitectonics are highly promising in electrochemical energy conversion technologies because of their fancy structural merits and accessible active sites; however, hitherto their precise template-free fabrication remains a great challenge. We report a template-free solvothermal one-pot approach for the rational design of cocentric PtNi multicube nanoarchitectonics via adjusting the oleylamine/oleic acid ratio with curcumin. The obtained multidimensional PtNi multicubes comprise multiple small interlace-stacked nanocube subunits assembled in spatially porous branched nanoarchitectonics and bound by high-index facets. The synthetic mechanism is driven by spontaneous isolation among prompt nucleation and oriented attachment epitaxial growth. These inimitable architectural and compositional merits of PtNi multicubes endowed the ethanol oxidation mass and specific activity by 5.6 and 9.03 times than the Pt/C catalyst, respectively, along with the enhancement of methanol oxidation mass activity by 2.3 times. Moreover, PtNi multicubes showed superior durability and a higher tolerance for CO poisoning than the Pt/C catalyst. This work may pave for tailored preparation of Pt-based nanoarchitectonics for myriad catalytic reactions.
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