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Electroreforming of Glucose and Xylose in Alkaline Medium at Carbon Supported Alloyed Pd3Au7 Nanocatalysts: Effect of Aldose Concentration and Electrolysis Cell Voltage

Author

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  • Thibault Rafaïdeen

    (IC2MP, UMR CNRS—Université de Poitiers n° 7285, 4 rue Michel Brunet, TSA 51106, CEDEX 9, 86073 Poitiers, France)

  • Neha Neha

    (IC2MP, UMR CNRS—Université de Poitiers n° 7285, 4 rue Michel Brunet, TSA 51106, CEDEX 9, 86073 Poitiers, France)

  • Bitty Roméo Serge Kouamé

    (IC2MP, UMR CNRS—Université de Poitiers n° 7285, 4 rue Michel Brunet, TSA 51106, CEDEX 9, 86073 Poitiers, France)

  • Stève Baranton

    (IC2MP, UMR CNRS—Université de Poitiers n° 7285, 4 rue Michel Brunet, TSA 51106, CEDEX 9, 86073 Poitiers, France)

  • Christophe Coutanceau

    (IC2MP, UMR CNRS—Université de Poitiers n° 7285, 4 rue Michel Brunet, TSA 51106, CEDEX 9, 86073 Poitiers, France)

Abstract

The effects of cell voltage and of concentration of sugars (glucose and xylose) on the performances of their electro-reforming have been evaluated at a Pd 3 Au 7 /C anode in 0.10 mol L −1 NaOH solution. The catalyst synthesized by a wet chemistry route is first comprehensively characterized by physicochemical and electrochemical techniques. The supported catalyst consists in alloyed Pd 3 Au 7 nanoparticles of circa 6 nm mean diameter deposited on a Vulcan XC72 carbon support, with a metal loading close to 40 wt%. Six-hour chronoamperometry measurements are performed at 293 K in a 25 cm 2 electrolysis cell for the electro-conversion of 0.10 mol L −1 and 0.50 mol L −1 glucose and xylose at cell voltages of +0.4 V, +0.6 V and +0.8 V. Reaction products are analyzed every hour by high performance liquid chromatography. The main products are gluconate and xylonate for glucose and xylose electro-reforming, respectively, but the faradaic yield, the selectivity and the formation rate of gluconate/xylonate decrease with the increase of aldose concentration, whereas lower faradaic yields and higher formation rates of gluconate/xylonate are observed at +0.8 V than at +0.4 V (higher chemical yields).

Suggested Citation

  • Thibault Rafaïdeen & Neha Neha & Bitty Roméo Serge Kouamé & Stève Baranton & Christophe Coutanceau, 2020. "Electroreforming of Glucose and Xylose in Alkaline Medium at Carbon Supported Alloyed Pd3Au7 Nanocatalysts: Effect of Aldose Concentration and Electrolysis Cell Voltage," Clean Technol., MDPI, vol. 2(2), pages 1-20, June.
    • Handle: RePEc:gam:jcltec:v:2:y:2020:i:2:p:13-203:d:372335
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    References listed on IDEAS

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    1. Christophe Coutanceau & Stève Baranton, 2016. "Electrochemical conversion of alcohols for hydrogen production: a short overview," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 5(4), pages 388-400, July.
    2. Alexandra Leader & Gabrielle Gaustad, 2019. "Critical Material Applications and Intensities in Clean Energy Technologies," Clean Technol., MDPI, vol. 1(1), pages 1-21, August.
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