A Facile Synthesis of MPd (M = Co, Cu) Nanoparticles and Their Catalysis for Formic Acid Oxidation

A Facile Synthesis of MPd (M = Co, Cu) Nanoparticles and Their Catalysis for Formic Acid Oxidation
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Mazumder, V, Chi M, Mankin MN, Liu Y, Metin Ö, Sun D, More KL, Sun S.  2012.  A Facile Synthesis of MPd (M = Co, Cu) Nanoparticles and Their Catalysis for Formic Acid Oxidation. Nano Letters. 12(2):1102-1106.

TitleA Facile Synthesis of MPd (M = Co, Cu) Nanoparticles and Their Catalysis for Formic Acid Oxidation
Publication TypeJournal Article
Year of Publication2012
AuthorsSun S, Mazumder V, Chi M, Mankin MN, Liu Y, Metin Ö, Sun D, More KL
JournalNano Letters
Volume12
Issue2
Pagination1102 - 1106
Date Published02/2012
ISSN1530-6992
KeywordsBimetallic nanoparticles, catalysis, formic acid oxidation, Pd-based nanoparticles, size and composition control
Abstract

Monodisperse CoPd nanoparticles (NPs) were synthesized and studied for catalytic formic acid (HCOOH) oxidation (FAO). The NPs were prepared by coreduction of Co(acac)2 (acac = acetylacetonate) and PdBr2 at 260 °C in oleylamine and trioctylphosphine, and their sizes (5–12 nm) and compositions (Co10Pd90 to Co60Pd40) were controlled by heating ramp rate, metal salt concentration, or metal molar ratios. The 8 nm CoPd NPs were activated for HCOOH oxidation by a simple ethanol wash. In 0.1 M HClO4 and 2 M HCOOH solution, their catalytic activities followed the trend of Co50Pd50 > Co60Pd40 > Co10Pd90 > Pd. The Co50Pd50 NPs had an oxidation peak at 0.4 V with a peak current density of 774 A/gPd. As a comparison, commercial Pd catalysts showed an oxidation peak at 0.75 V with peak current density of only 254 A/gPd. The synthesis procedure could also be extended to prepare CuPd NPs when Co(acac)2 was replaced by Cu(ac)2 (ac = acetate) in an otherwise identical condition. The CuPd NPs were less active catalysts than CoPd or even Pd for FAO in HClO4 solution. The synthesis provides a general approach to Pd-based bimetallic NPs and will enable further investigation of Pd-based alloy NPs for electro-oxidation and other catalytic reactions.

URLhttp://pubs.acs.org/doi/full/10.1021/nl2045588
DOI10.1021/nl2045588
Short TitleNano Lett.