Selective electrocatalytic hydrogenation using palladium nanoparticles electrochemically formed in layer-by-layer multilayer films

Physical Chemistry Chemical Physics : PCCP
M VillalbaErnesto J Calvo

Abstract

Sequential adsorption of PdCl4(2-) within weak polyelectrolyte layer-by-layer (LbL) self-assembled multilayer films with further electrochemical reduction to yield Pd(0) nanoparticles (Pd-NPs) has been demonstrated. The electrocatalytic hydrogenation (ECH) of model molecules such as acetophenone and benzophenone on Pd-NPs of different sizes (6 to 35 nm) and bulk Pd crystal surface in hydroalcoholic acid solution has been investigated. Distribution of reaction products (secondary alcohols and alkanes) and faradaic yield was systematically investigated. While the polyelectrolyte multilayers act as nanoreactors by confining PdCl4(2-) ions and preventing the formation of large crystals, their presence also alters the hydrogenation reaction and therefore heat treated surfaces showed only the effect of nanocrystal size on the reaction selectivity and faradaic yield.

References

Mar 5, 2004·Journal of the American Chemical Society·Srividhya KidambiMerlin L Bruening
Apr 19, 2005·Chemical Communications : Chem Comm·Robert RajaBrian F G Johnson
Nov 17, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Zhi LiMichael F Rubner
Nov 15, 2008·Chemical Communications : Chem Comm·Miguel VagoErnesto J Calvo
Feb 24, 2009·Journal of the American Chemical Society·Somnath BhattacharjeeMerlin L Bruening
May 28, 2010·Physical Chemistry Chemical Physics : PCCP·Jakub S JirkovskýDavid J Schiffrin

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Citations

Jun 17, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Matias VillalbaErnesto J Calvo
Apr 7, 2018·Beilstein Journal of Organic Chemistry·Cristina Mozo MuleroVicente Montiel

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