NDLI: Nanoporous bimetallic Pt–Au alloy nanocomposites with superior catalytic activity towards electro-oxidation of methanol and formic acid

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Xiaoguang Zhang, Zhonghua Wang, Yan
Copyright Year	2011
Abstract	We present a facile route to fabricate novel nanoporous bimetallic Pt–Au alloy nanocomposites by dealloying a rapidly solidified Al75Pt15Au10 precursor under free corrosion conditions. The microstructure of the precursor and the as-dealloyed sample was characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and energy dispersive X-ray (EDX) analysis. The Al75Pt15Au10 precursor is composed of a single-phase Al2(Au,Pt) intermetallic compound, and can be fully dealloyed in a 20 wt.% NaOH or 5 wt.% HCl aqueous solution. The dealloying leads to the formation of the nanoporous Pt60Au40 nanocomposites (np-Pt60Au40 NCs) with an fcc structure. The morphology, size and crystal orientation of grains in the precursor can be conserved in the resultant nanoporous alloy. The np-Pt60Au40 NCs consist of two zones with distinct ligament/channel sizes and compositions. The formation mechanism of these np-Pt60Au40 NCs can be rationalized based upon surface diffusion of more noble elements and spinodal decomposition during dealloying. Electrochemical measurements demonstrate that the np-Pt60Au40 NCs show superior catalytic activity towards the electro-oxidation of methanol and formic acid in the acid media compared to the commercial JM-Pt/C catalyst. This material can find potential applications in catalysis related areas, such as direct methanol or formic acid fuel cells. Our findings demonstrate that dealloying is an effective and simple strategy to realize the alloying of immiscible systems under mild conditions, and to fabricate novel nanostructures with superior performance.
Starting Page	1663
Ending Page	1674
Page Count	12
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	3
Issue Number	4
Journal	Nanoscale
DOI	10.1039/c0nr00830c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Hydrochloric acid Ligament Transmission electron microscopy Corrosion High-resolution transmission electron microscopy Spinodal decomposition Surface diffusion Intermetallic Scanning electron microscope Methanol
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Nanoporous core–shell Cu@Cu₂O nanocomposites with superior photocatalytic properties towards the degradation of methyl orange

Pt based nanocomposites (mono/bi/tri-metallic) decorated using different carbon supports for methanol electro-oxidation in acidic and basic media

Corrosion inhibition of 15 Vol. % 6061 Al alloy/SiCp composite in 1 M hydrochloric acid medium

Binary [Cu₂O/MWCNT] and ternary [Cu₂O/ZnO/MWCNT] nanocomposites: formation, characterization and catalytic performance in partial ethanol oxidation

Electro-catalytic activity of nano-sized pt-ni bimetallic alloy particles supported on carbon.

An ultrafine nanoporous bimetallic Ag–Pd alloy with superior catalytic activity

Synthesis of Cu, Zn and Cu/Zn brass alloy nanoparticles from metal amidinate precursors in ionic liquids or propylene carbonate with relevance to methanol synthesis

Synthesis, characterization and catalytic activity of graphene oxide/ZnO nanocomposites

The Microstructure of Ball Bond Corrosion Failures

Nanoporous bimetallic Pt–Au alloy nanocomposites with superior catalytic activity towards electro-oxidation of methanol and formic acid

Similar Documents

Nanoporous core–shell Cu@Cu2O nanocomposites with superior photocatalytic properties towards the degradation of methyl orange

Pt based nanocomposites (mono/bi/tri-metallic) decorated using different carbon supports for methanol electro-oxidation in acidic and basic media

Corrosion inhibition of 15 Vol. % 6061 Al alloy/SiCp composite in 1 M hydrochloric acid medium

Binary [Cu2O/MWCNT] and ternary [Cu2O/ZnO/MWCNT] nanocomposites: formation, characterization and catalytic performance in partial ethanol oxidation

Electro-catalytic activity of nano-sized pt-ni bimetallic alloy particles supported on carbon.

An ultrafine nanoporous bimetallic Ag–Pd alloy with superior catalytic activity

Synthesis of Cu, Zn and Cu/Zn brass alloy nanoparticles from metal amidinate precursors in ionic liquids or propylene carbonate with relevance to methanol synthesis

Synthesis, characterization and catalytic activity of graphene oxide/ZnO nanocomposites

The Microstructure of Ball Bond Corrosion Failures

Nanoporous bimetallic Pt–Au alloy nanocomposites with superior catalytic activity towards electro-oxidation of methanol and formic acid

Nanoporous core–shell Cu@Cu₂O nanocomposites with superior photocatalytic properties towards the degradation of methyl orange

Binary [Cu₂O/MWCNT] and ternary [Cu₂O/ZnO/MWCNT] nanocomposites: formation, characterization and catalytic performance in partial ethanol oxidation