Synthesis of hollow PtAg alloy nanospheres with excellent electrocatalytic performances towards methanol and formic acid oxidations

Hollow PtAg alloy nanospheres were synthesized via galvanic replacement reaction between silver nanoparticles and K 2 PtCl 4 at 60 °C. Their morphology, composition and structure were characterized by UV-vis, XRD, TEM, HRTEM, SAED, EDX and XPS. It was found that the shell thickness and roughness cou...

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Bibliographic Details
Published inRSC advances Vol. 6; no. 50; pp. 44902 - 44907
Main Authors Zheng, Fulin, Luk, Sin-Yee, Kwong, Tsz-Lung, Yung, Ka-Fu
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
Formic acid
Methyl alcohol
Nanoparticles
Nanospheres
Platinum
Precursors
Tolerances
X-ray photoelectron spectroscopy
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Summary:Hollow PtAg alloy nanospheres were synthesized via galvanic replacement reaction between silver nanoparticles and K 2 PtCl 4 at 60 °C. Their morphology, composition and structure were characterized by UV-vis, XRD, TEM, HRTEM, SAED, EDX and XPS. It was found that the shell thickness and roughness could be controlled by varying the amount of Pt precursor solutions. Compared with commercially available Pt black, the PtAg showed higher catalytic activity and higher CO tolerance towards the electro-oxidations of methanol and formic acid, which make them a prominent catalyst for DMFCs and DFAFCs.
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ISSN:2046-2069
2046-2069
DOI:10.1039/C6RA06398E