NDLI: Nanoporous twinned PtPd with highly catalytic activity and stability

Content Provider	Royal Society of Chemistry (RSC)
Author	Veres, Teodor Rosei, Federico Malic, Lidija Zhang, Xuefeng Trudeau, Michel Guan, Pengfei
Copyright Year	2015
Abstract	Growing needs for highly efficient energy storage devices have prompted increasing research efforts in energy-efficient and sustainable materials. In this context, nanoporous noble metals have been studied extensively because of their extraordinary properties. However, existing electrochemical/chemical dealloying approaches for their synthesis largely lack the ability to optimize their structure/function relationships. To overcome this limitation, we developed a thermal-decomposition strategy for the synthesis of component-controllable nanoporous PtPd alloys composed of ∼2 nm sawtooth-like ligaments induced by a high density of twinning boundaries (boundary spacing ∼ 1 nm). Such twinned and ultrathin ligaments exhibit large curvatures between concave and convex regions, associated with abundant low-coordination surface atomic steps and kinks. These low-coordination atoms are sites of high catalytic activity, as confirmed by theoretical simulations. The optimized Pt25Pd75 sample exhibits the best catalytic performance among all the currently reported catalysts, and has a mass activity of 1110 mA mg−1Pt−1 and high stability for the electro-oxidation of methanol.
Starting Page	2050
Ending Page	2056
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	5
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta06250g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrochemistry Methanol
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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