Selective Glycerol Oxidation by Electrocatalytic Dehydrogenation

Kim, Hyung Ju; Lee, Jechan; Green, Sara K.; Huber, George W.; Kim, Won

doi:10.1002/cssc.201301218

Cited by 70 publications

(58 citation statements)

References 42 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, the subsequent tedious extraction process also limited its large‐scale application. Alternatively, GLY conversion by electrochemical oxidation has recently attracted much attention . Electro‐oxidation of GLY is a totally green process, which does not involve any toxic oxidants.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Conversion of Glycerol into Value‐Added Chemicals by Selective Electro‐Oxidation on Pt‐Based Catalysts

2018

View full text Add to dashboard Cite

Electro‐oxidation of glycerol affords a totally green route to produce high value‐added chemicals. Herein, we report a study on glycerol electro‐oxidation over a series of graphene nanosheet supported Pt (Pt/GNS), PtNi (PtNi/GNS), PtRu (PtRu/GNS), PtRh (PtRh/GNS), PtRuNi (PtRuNi/GNS), and PtRhNi (PtRhNi/GNS) catalysts in alkaline solution. The activity of the catalysts was evaluated by cyclic voltammetry, linear sweep voltammetry, and chronoamperometric measurements. The PtRh/GNS and PtRhNi/GNS catalysts exhibited superior activity in terms of higher current densities and lower onset potentials. The products of glycerol oxidation formed at potentials of −0.4, −0.1, and 0.2 V, were systematically analyzed by high performance liquid chromatography (HPLC). Five compounds as products from glycerol electro‐oxidation catalyzed by the prepared materials were found, including glyceraldehyde, glycolic acid, tartronic acid, glyceric acid and oxalate acid. The product distribution at the different potentials was investigated for all catalysts. A maximum glycolic acid selectivity of 65.4 % was obtained for the Pt/GNS catalyst at 0.2 V while a maximum glyceric acid selectivity of 47.7 % was achieved using the PtNi/GNS catalyst at −0.1 V. It was found that the introduction of Ru facilitated the formation of C3 products while the addition of Rh was beneficial for the formation of C2 products. Based on HPLC results, the pathways of glycerol electro‐oxidation by the prepared catalysts were proposed.

show abstract

Section: Introductionmentioning

confidence: 99%

Sustainable Conversion of Glycerol into Value‐Added Chemicals by Selective Electro‐Oxidation on Pt‐Based Catalysts

2018

View full text Add to dashboard Cite

show abstract

“…Recently, efforts have been devoted to developing efficient electrochemical conversion technologies to produce value‐added chemicals and/or energy from biomass‐derived oxygenates such as glycerol . The electrocatalytic conversion process of glycerol is a promising technology that can produce valuable chemicals such as dihydroxyacetone, glyceraldehyde, and glyceric acid by selective oxidation reaction and electrical energy by a full oxidization reaction . In particular, full glycerol oxidation has been considered a promising reaction for direct alcohol fuel cells (DAFC), because glycerol is nonflammable and has environmentally friendly properties; it also possesses high theoretical energy density, with relatively low price and simple purification steps .…”

Section: Introductionmentioning

confidence: 99%

The Role of Ruthenium on Carbon‐Supported PtRu Catalysts for Electrocatalytic Glycerol Oxidation under Acidic Conditions

Kim

Lee

et al. 2017

ChemCatChem

Self Cite

View full text Add to dashboard Cite

A series of binary PtRu catalysts with different Pt/Ru atomic ratios (from 7:3 to 3:7) were synthesized on a carbon support using the colloidal method; they were then used for electrooxidation of glycerol in acid media. X‐ray diffraction, transmission electron microscopy, X‐ray photoelectron spectroscopy, and X‐ray absorption spectroscopy analyses were used to investigate particle size, size distribution, and structural and electronic properties of the prepared catalysts. Ru added to the Pt‐based catalysts caused structural and electronic modifications over the PtRu alloy catalyst formation. The electrocatalytic activities of PtRu/C series catalysts were investigated using cyclic voltammetry. The Pt5Ru5/C catalyst shows enhanced catalytic activity at least 40 % higher than that of the Pt/C catalyst, with improved stability for glycerol electrooxidation; these improvements are attributed to structural and electronic modifications of the Pt catalysts. Using an electrocatalytic batch reactor, product analysis after the oxidation reaction was performed by high‐performance liquid chromatography to determine and compare the reaction pathways on the Pt/C and PtRu/C catalysts. To understand different catalytic activities of glycerol oxidation on the PtRu alloy surfaces, density functional calculations were performed.

show abstract

“…For instance, Kim et al obtained selectivities values of 87% and 50% for GLA and GALD, respectively, from carbon supported Pt catalyst. 19 Zhang et al synthesized a PtCo/RGO catalyst with a GLA selectivity of 85.9%, which was higher than those of Pt/RGO and Co/RGO. 20 Dai et al studied GLY oxidation over an AuPt catalyst which showed a selectivity of 70% for lactic acid.…”

Section: Introductionmentioning

confidence: 97%

Product Distribution of Glycerol Electro-oxidation over Platinum-Ceria/Graphene Nanosheet

2019

View full text Add to dashboard Cite

Pt and ceria nanoparticles were deposited into graphene nanosheets (Pt-CeO 2-x /GNS) via a polyol-assisted reduction process and examined as catalysts for the electro-oxidation of glycerol in alkaline solutions. The electrochemical activity of the catalyst was evaluated by cyclic voltammogram and chronoamperometry measurements. The products of glycerol oxidation over the catalyst were analyzed by high performance liquid chromatography. It was found that the Pt-CeO 2-x /GNS catalyst facilitated the formation of C3 products. The ratio between C3 products and C2 products is 2.6 for the Pt-CeO 2-x /GNS, which is much larger than that of 0.8 for the GNS supported Pt nanoparticles (Pt/GNS) at −0.4 V (vs. SCE.). Notably, a glyceraldehyde selectivity of 52% over the Pt-CeO 2-x /GNS was obtained at −0.4 V. The enhanced activity and selectivity of Pt-CeO 2-x /GNS catalyst relative to the Pt/GNS catalyst is related to the bifunctional and electronic effects.

show abstract

Selective Glycerol Oxidation by Electrocatalytic Dehydrogenation

Cited by 70 publications

References 42 publications

Sustainable Conversion of Glycerol into Value‐Added Chemicals by Selective Electro‐Oxidation on Pt‐Based Catalysts

Sustainable Conversion of Glycerol into Value‐Added Chemicals by Selective Electro‐Oxidation on Pt‐Based Catalysts

The Role of Ruthenium on Carbon‐Supported PtRu Catalysts for Electrocatalytic Glycerol Oxidation under Acidic Conditions

Product Distribution of Glycerol Electro-oxidation over Platinum-Ceria/Graphene Nanosheet

Contact Info

Product

Resources

About