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Catalysts 2015, 5(2), 992-1002; doi:10.3390/catal5020992

Sacrificial Template-Based Synthesis of Unified Hollow Porous Palladium Nanospheres for Formic Acid Electro-Oxidation

Jiangsu key laboratory of Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
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Academic Editor: Minhua Shao
Received: 1 April 2015 / Revised: 15 June 2015 / Accepted: 16 June 2015 / Published: 23 June 2015
(This article belongs to the Special Issue Electrocatalysis in Fuel Cells)
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Abstract

Large scale syntheses of uniform metal nanoparticles with hollow porous structure have attracted much attention owning to their high surface area, abundant active sites and relatively efficient catalytic activity. Herein, we report a general method to synthesize hollow porous Pd nanospheres (Pd HPNSs) by templating sacrificial SiO2 nanoparticles with the assistance of polyallylamine hydrochloride (PAH) through layer-by-layer self-assembly. The chemically inert PAH is acting as an efficient stabilizer and complex agent to control the synthesis of Pd HPNSs, probably accounting for its long aliphatic alkyl chains, excellent coordination capability and good hydrophilic property. The physicochemical properties of Pd HPNSs are thoroughly characterized by various techniques, such as transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy. The growth mechanism of Pd HPNSs is studied based on the analysis of diverse experimental observations. The as-prepared Pd HPNSs exhibit clearly enhanced electrocatalytic activity and durability for the formic oxidation reaction (FAOR) in acid medium compared with commercial Pd black. View Full-Text
Keywords: hollow porous Pd nanospheres; polyallylamine hydrochloride; sacrificial SiO2 nanoparticles; formic oxidation reaction hollow porous Pd nanospheres; polyallylamine hydrochloride; sacrificial SiO2 nanoparticles; formic oxidation reaction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Qiu, X.; Zhang, H.; Dai, Y.; Zhang, F.; Wu, P.; Wu, P.; Tang, Y. Sacrificial Template-Based Synthesis of Unified Hollow Porous Palladium Nanospheres for Formic Acid Electro-Oxidation. Catalysts 2015, 5, 992-1002.

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