Carbon supported Au–Pd core–shell nanoparticles for hydrogen production by alcohol electroreforming

Miller, Hamish A.; Bellini, Marco; Vizza, Francesco; Hasenöhrl, Christoph Roland; Tilley, Richard D.

doi:10.1039/c6cy00720a

Cited by 44 publications

(36 citation statements)

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“…[26][27][28][29] For example, 1,2-propandiol can be employed in electroreforming to produce lactate, an industrially relevant chemical. [30][31][32][33] The efficiency of an electrolyzer is directly related to the electrode materials, in particular to the catalysts deposited onto the surface of the electrodes. The function of these catalysts is to reduce the activation energy for both the anode and cathode reactions.…”

Section: Introductionmentioning

confidence: 99%

Carbon supported Rh nanoparticles for the production of hydrogen and chemicals by the electroreforming of biomass-derived alcohols

et al. 2017

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Electroreforming is a low energy cost technology that combines the production of valuable chemicals from biomass-derived alcohols with the evolution of clean hydrogen at low temperature and atmospheric pressure. The selectivity for the desired chemicals is governed by the nature of the anode catalyst. Here we report the synthesis and characterization of a carbon supported nanostructured Rh electrocatalyst. The Rh nanoparticles are shown to be highly dispersed (2.2 nm) and a complete electrochemical study is reported. This Rh/C catalyst exhibits high activity for alcohol electrooxidation (e.g. 5700 A gRhfor EG at 80 Â°C) and when employed with an anion exchange membrane and Pt/C cathode in an electroreformer produces high volumes of hydrogen at low electrical energy input (e.g. 500 mA cmâ\u88\u922at 0.7 Vcelland Ecost= 9.6 kW h kgH2â\u88\u921). A complete analysis of the alcohol oxidation products from several renewable alcohols (ethanol, ethylene glycol, glycerol and 1,2-propandiol) shows a selectivity in the formation of valuable chemicals such as lactate and glycolate

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Section: Introductionmentioning

confidence: 99%

Carbon supported Rh nanoparticles for the production of hydrogen and chemicals by the electroreforming of biomass-derived alcohols

et al. 2017

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“…The MEA were fabricated by mechanically pressing the anode (nickel foam), cathode Pt/C (carbon cloth), and membrane within the cell hardware. 26 Electrolysis Cell Testing. The fuel, a 30 mL aqueous solution containing 2 M 1,3-propandiol (60 mmol) and 2 M KOH, was recirculated through the anode compartment at 1 mL min −1 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Electrochemical Coproduction of Acrylate and Hydrogen from 1,3-Propandiol

Mahmoudian

Bellini

Pagliaro

et al. 2017

ACS Sustainable Chem. Eng.

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The coproduction of acrylate and hydrogen from 1,3-propandiol is achieved by electrochemical reforming using a nanoparticle Pd on mixed Vulcan XC-72 carbon and ceria electrocatalyst (Pd/C-CeO 2 ). Electrolysis cell parameters (potential, temperature, and flow conditions) are tuned to favor the formation of acrylate with respect to the other oxidation products (3-hydroxypropanoate and malonate). Using high cell temperature combined with a low cell voltage favors the formation of acrylate, the selectivity for which is further enhanced by flowing the 1,3-propandiol solution in single-pass mode rather than recycling through the electrolyzer. Hence, at a cell temperature of 80°C and at a fixed cell potential of 400 mV using a one pass continuous flow of 1,3-propandiol, 77% of selectivity for acrylate is obtained.

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“…Up to now, the majority of electrolysis occurs in acidic media and needs precious and expensive metals (IrO 2 , RuO 2 , Pt), and only a few attempts have been dedicated to solid alkaline membrane electrolysis cells (SAMECs) for organics oxidation at the anode. [7][8][9][10][11] Thus, an advanced electrode material for the selective oxidation of organics in an EC enables recovering a value-added product, enabling to cut down the overall H 2 production cost. Furthermore, the production of chemicals from pristine abundant organics (known as organic electrosynthesis) could also become an excellent idea to avoid excessive CO 2 emissions.…”

mentioning

confidence: 99%

“…Carbon-based fuels can be used in fuel cells (FCs) [1][2][3][4][5][6] for the production of electricity -despite their relatively low gravimetric energy density compared to molecular hydrogen, 33 kWh kg −1 vs. 1-9 kWh kg −1 -or in electrolysis cells (ECs) [7][8][9][10][11] for the production of fuels and/or chemicals. For FCs, the main selection criterion for the design and fabrication of electrode materials is the electrooxidation with the lowest overpotential, i.e., at low electrode potentials (E), ideally E < 0.7 V vs. reversible hydrogen electrode (RHE).…”

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confidence: 99%

Electrocatalytic and Electroanalytic Investigation of Carbohydrates Oxidation on Gold-Based Nanocatalysts in Alkaline and Neutral pHs

Holade

Engel

Servat

et al. 2018

J. Electrochem. Soc.

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The design and fabrication of durable nanocatalysts to efficiently and selectively electro-oxidize organic molecules toward valueadded product(s) is an important starting point for the future deployment of electrochemical "cogeneration" devices with the triple advantage of producing electricity, heat and fuels/chemicals. This interdisciplinary research requires a synergistic effort from three communities of electrochemistry/electrocatalysis, material science and organic chemistry. To this end, we chose to explore the integration of different electrochemical and analytical techniques to study the outstanding ability of gold-based nanomaterials in the electrocatalytic oxidation of mono-and di-saccharides. In order to rationalize the previous outcomes on the selective catalysts for glucose-to-gluconate conversion toward cogenerating organic electrosynthesis (ECS Trans., 77, 1547), a multivariate study is carried out in alkaline and neutral pHs by examining three substrates, glucose, galactose, lactose and different electrodes. Electroanalytical investigation revealed that these substrates are selectively oxidized at their C1-position (two transferred electrons). At pH 7.4, the corresponding lactone and acid forms were detected by their specific vibration bands of 1744 and 1780 cm −1 , which is explained by a local pH decrease within the thin-electrolyte. Our study delineates a broad strategy for organic electrosynthesis in electrochemical cells by controlling electrode materials fabrication. Electrocatalysis plays a central role in chemical science by enabling the conversion of chemical energy ( reaction G, kJ mol -1 ) into electrical energy (E cell , V) and vice versa. Carbon-based fuels can be used in fuel cells (FCs) 1-6 for the production of electricity -despite their relatively low gravimetric energy density compared to molecular hydrogen, 33 kWh kg −1 vs.

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Carbon supported Au–Pd core–shell nanoparticles for hydrogen production by alcohol electroreforming

Abstract: Monodisperse faceted icosahedral Au–Pd core–shell nanocrystals of small size (<12 nm) supported on Vulcan XC-72 (Au–Pd/C) are employed in electroreforming for the cogeneration of hydrogen and valuable chemicals.

Cited by 44 publications

References 43 publications

Carbon supported Rh nanoparticles for the production of hydrogen and chemicals by the electroreforming of biomass-derived alcohols

Carbon supported Rh nanoparticles for the production of hydrogen and chemicals by the electroreforming of biomass-derived alcohols

Electrochemical Coproduction of Acrylate and Hydrogen from 1,3-Propandiol

Electrocatalytic and Electroanalytic Investigation of Carbohydrates Oxidation on Gold-Based Nanocatalysts in Alkaline and Neutral pHs

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