Energy &amp; Chemicals from Renewable Resources by Electrocatalysis

Bellini, Marco; Bevilacqua, Manuela; Innocenti, Massimo; Lavacchi, Alessandro; Miller, Hamish A.; Filippi, Jonathan; Marchionni, Andrea; Oberhauser, Werner; Wang, L.; Vizza, Francesco

doi:10.1149/2.005407jes

Cited by 20 publications

(17 citation statements)

References 55 publications

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“…There is a growing demand for advanced electrochemical devices for energy storage and energy conversion, for example for electrical vehicles or smart devices [1,2]. Despite of the technological progress, some fundamental aspect of electrochemistry derived from macroscopic electrostatic theory are still not satisfactorily characterized on the explicit atomistic level.…”

Section: Introductionmentioning

confidence: 99%

The electric double layer at metal-water interfaces revisited based on a charge polarization scheme

Sakong

Groß

2018

The Journal of Chemical Physics

170

197

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The description of electrode-electrolyte interfaces is based on the concept of the formation of an electric double layer. This concept was derived from continuum theories extended by introducing point charge distributions. Based on molecular dynamics simulations, we analyze the electric double layer in an approach beyond the point charge scheme by instead assessing charge polarizations at electrochemical metal-water interfaces from first principles. We show that the atomic structure of water layers at room temperature leads to an oscillatory behavior of the averaged electrostatic potential. We address the relation between the polarization distribution at the interface and the extent of the electric double layer and subsequently derive the electrode potential from the charge polarization.

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Section: Introductionmentioning

confidence: 99%

The electric double layer at metal-water interfaces revisited based on a charge polarization scheme

Sakong

Groß

2018

The Journal of Chemical Physics

170

197

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“…The aldehyde is considered to be either an intermediate or a reaction product of electrocatalytic AOR. [35][36][37][38][39][40] Thus, we proposed that a faster reaction rate of electrocatalytic aldehyde oxidation reaction (ADOR) can contribute to the acceleration of AOR, leading to a higher electricity output in DAFCs. In study of electrocatalytic ADOR, previous researchers have successfully used bulk metal anodes [41], Au nanoparticles [42], and Pd nanoparticles supported on carbon nanotubes (Pd/CNT) [43] for formaldehyde (C 1 7 aldehyde) oxidation reaction.…”

Section: Introductionmentioning

confidence: 99%

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Benipal

Liang

et al. 2016

Applied Catalysis B: Environmental

162

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2 3 1.PdAg/CNT with 2.7 nm average particle size is prepared without using surfactants. 2.Ag outperforms Pt, Pd, and Au towards electrocatalytic aldehyde oxidation. 3.PdAg/CNT has high activity towards electrocatalytic alcohol oxidation. 4.PdAg/CNT was used as a highly active anode catalyst for direct alcohol fuel cells. 5.PdAg/CNT cleaves C-C bond of glycerol more effectively than Pd/CNT. 4 ABSTRACTSPdAg supported on carbon nanotubes (PdAg/CNT) with an average particle size of 2.7 nm is prepared by an aqueous phase reduction method for alcohol oxidation reaction in direct alcohol fuel cells. In a half-cell system with three electrodes, the peak mass activity of PdAg/CNT reaches 0.105 mA µg Pd -1 , 0.305 mA µg Pd -1 , 2.105 mA µg Pd -1 , and 8.53 mA µg Pd -1 for methanol oxidation reaction, ethanol oxidation reaction, ethylene glycol oxidation reaction, and glycerol oxidation reaction, respectively, in 1 M KOH 0.1 M alcohol electrolyte. These values are higher than the mass activity of Pd/CNT at the same applied potential. With PdAg/CNT (0.5 mg Pd per MEA -1 ) as an anode catalyst, a direct methanol fuel cell, a direct ethanol fuel cell, a direct ethylene glycol fuel cell and a direct glycerol fuel cell achieve peak power densities of 135.1 mW cm -2 , 202.3 mW cm -2 , 245.2 mW cm -2 , and 276.2 mW cm -2 , with corresponding peak mass activities of 270.2 mW mg Pd per MEA -1 , 404.6 mW mg Pd per MEA -1 , 490.4 mW mg Pd per MEA -1 , and 552.4 mW mg Pd per MEA -1 , respectively, at 80 °C and ambient pressure. Ag has shown excellent activity towards aldehyde (formaldehyde, acetaldehyde, and glyoxylate) oxidation, thus, the enhancement in alcohol oxidation on PdAg/CNT is proposed due to Ag's promotion of intermediate aldehyde oxidation. PdAg/CNT also improves the fuel efficiency of glycerol oxidation by contributing to the C-C bond cleavage of C 3 glycerol to C 2 oxalate.5

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“…Direct Alcohol Fuel Cells (DAFC) that operate in alkaline environment are one of the few electrochemical devices able to convert a renewable fuel source, like biomass derived alcohol or sugars, into electric energy and industrial relevant feedstocks, e.g. aldehydes and ketones . Recently, Grützmacher, Bianchini, Vizza and co‐workers, set up the first DAFC that operates in alkaline environment and employs a metal complex based anode and therefore was named Organo Metallic Fuel Cell (OMFC) .…”

Section: Complete Organometallic Fuel Cells (Omfcs)mentioning

confidence: 99%

Energy Production and Storage Promoted by Organometallic Complexes

et al. 2018

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Organometallic complexes have intrinsically excellent characteristics as a new class of electrocatalyst for clean energy production in fuel cells and electrolyzers. The state‐of‐the‐art materials for these devices are based on precious metal nanoparticles dispersed on conductive carbon‐based supports. Although such materials have reached very high performance levels in terms of activity and stability, they suffer from some intrinsic limitations that contribute to hinder the commercial development of fuel cells and electrolyzers on a large scale. Organometallic‐based electrocatalysts may help to overcome such limitations. For example, they exhibit high selectivity in alcohol and sugar electrooxidation. Additionally, precious metal loadings can be reduced significantly using single site organometallic catalysts where each metal atom is potentially active. In this review, we will discuss various literature examples of organometallic electrocatalysts employed as anodes for fuel cells and electrolyzers and as cathodes for the hydrogen evolution reaction (HER). We will focus our attention on the few examples of electrocatalysts that have been successfully used in complete cells.

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Energy & Chemicals from Renewable Resources by Electrocatalysis

Cited by 20 publications

References 55 publications

The electric double layer at metal-water interfaces revisited based on a charge polarization scheme

The electric double layer at metal-water interfaces revisited based on a charge polarization scheme

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Energy Production and Storage Promoted by Organometallic Complexes

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