A review of recent progress on electrocatalysts toward efficient glycerol electrooxidation

Alaba, Peter Adeniyi; Lee, Ching Shya; Abnisa, Faisal; Aroua, Mohamed Kheireddine; Cognet, Patrick; Pérès, Yolande; Daud, Wan Mohd Ashri Wan

doi:10.1515/revce-2019-0013

Cited by 41 publications

(40 citation statements)

References 215 publications

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“…Glycerol is the main byproduct of biodiesel production. , A forecast report based on statistical data from the Organization for Economic Cooperation and Development (OECD) pointed out that global glycerol production was 3.6 billion L in 2016, with projection to reach 4.0 billion L/year by 2026 . The glycerol oxidation reaction (GOR) is the most studied among all biomass-derived polyols. ,,− ,− Tuning of selectivity for this reaction toward specific products has been demonstrated through choice of catalyst, potential, and reaction medium, among other reaction parameters. Scheme a and Table summarize each major GOR product that has been reported, along with record selectivity/yield.…”

Section: Demonstrated Electrochemical Routes For Conversion Of Interm...mentioning

confidence: 99%

Electrochemical Routes for the Valorization of Biomass-Derived Feedstocks: From Chemistry to Application

et al. 2021

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The drive to reduce consumption of fossil resources, coupled with expanding capacity for renewable electricity, invites the exploration of new routes to utilize this energy for the sustainable production of fuels, chemicals, and materials. Biomass represents a possible source of platform precursors for such commodities due to its inherent ability to fix CO 2 in the form of multi-carbon organic molecules. Electrochemical methods for the valorization of biomass are thus intriguing, but there is a need to objectively evaluate this field and define the opportunity space by identifying pathways suited to electrochemistry. In this contribution we offer a comprehensive, critical review of recent advances in lowtemperature (liquid phase), electrochemical reduction and oxidation of biomass-derived intermediates (polyols, furans, carboxylic acids, amino acids, and lignin), with emphasis on identifying the state-of-the-art for each documented reaction. Progress in computational modeling is also reviewed. We further suggest a number of possible reactions that have not yet been explored but which are expected to proceed based on established routes to transform specific functional groups. We conclude with a critical discussion of technological challenges for scale-up, fundamental research needs, process intensification opportunities (e.g., by pairing compatible oxidations and reductions), and new benchmarking standards that will be necessary to accelerate progress toward application in this still-nascent field.

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Section: Demonstrated Electrochemical Routes For Conversion Of Interm...mentioning

confidence: 99%

Electrochemical Routes for the Valorization of Biomass-Derived Feedstocks: From Chemistry to Application

et al. 2021

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“…Even though base addition is environmentally undesirable, in this process, whilst an inorganic base can act as an electrolyte for the reaction, other buffers can be applied [205]. As an active phase, different noble metals have been reported, but the design of catalysts based on other economic transition metals, stable in acid media, represents a challenge to overcome for their application [206].…”

Section: Glycerol Selective Oxidationmentioning

confidence: 99%

Recent Advances in Glycerol Catalytic Valorization: A Review

et al. 2020

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Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.

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“…The global glycerol production was 3.6 billion liters in 2016 and is projected to reach 4.0 billion liters per year by 2026 . The abundance of glycerol has motivated the research for upgrading glycerol to value-added products, thus making biodiesel production more environmentally benign and economically feasible. − In 2004, the US Department of Energy had listed glycerol as one of the top 12 sugar-derived platform building blocks …”

Section: Introductionmentioning

confidence: 99%

“…The electrocatalytic glycerol oxidation reaction (EGOR) driven by renewable electricity (such as solar and wind) is a promising pathway for fine chemical production. ,− Currently, most of the developed electrocatalysts for the EGOR are based on precious noble metals, such as Pt, Au, Pd, and its alloys. − Advantages of using these noble metal electrocatalysts include low oxidation overpotential and ability to obtain a plethora of valuable C 3 products such as glyceraldehyde (GLAD), glyceric acid (GLA), and dihydroxyacetone (DHA). However, when earth-abundant, low-cost transition metal electrocatalysts are used, the deep oxidation product such as formic acid (FA) is most often obtained. − Therefore, significant challenges remain in searching for a suitable glycerol electro-oxidation system that is cost-effective, sustainable, resistant to carbonaceous species poisoning, and capable of replacing the expensive noble metals in producing value-added C 3 products. , …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of Glycerol to Dihydroxyacetone in Borate Buffer: Enhancing Activity and Selectivity by Borate–Polyol Coordination Chemistry

Huang

Zou

Jiang

2021

ACS Sustainable Chem. Eng.

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Selective electrochemical oxidation of glycerol, the major byproduct during the biodiesel production process, can not only make biodiesel production more environmentally benign and economically feasible but also generate value-added C3 chemicals that are important for medicinal and cosmetics applications. However, severe C–C bond breakage often occurs, which would lead to low C3 selectivity, especially on earth-abundant, low-cost transition metal electrocatalysts. In this study, by exploiting the coordination ability of borate ions with polyol molecules, we report enhanced and selective electrochemical oxidation of glycerol to ∼85% C3 chemicals (67% for dihydroxyacetone in detected liquid products, with an average production rate of 90 mmol m–2 h–1), using cobalt borate as the electrocatalyst in borate buffer electrolyte. The improved electrochemical activity and selectivity at different borate buffer concentrations and solution pH values have been explicitly correlated with the coordination ability of borate with glycerol under different circumstances, as revealed by 11B NMR spectroscopy studies. The strategy presented herein can be potentially extended to the selective upgrading of a broad scope of biomass-derived sugars and polyols, for producing value-added chemicals on low-cost non-noble metal electrocatalysts.

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A review of recent progress on electrocatalysts toward efficient glycerol electrooxidation

Cited by 41 publications

References 215 publications

Electrochemical Routes for the Valorization of Biomass-Derived Feedstocks: From Chemistry to Application

Electrochemical Routes for the Valorization of Biomass-Derived Feedstocks: From Chemistry to Application

Recent Advances in Glycerol Catalytic Valorization: A Review

Electrochemical Oxidation of Glycerol to Dihydroxyacetone in Borate Buffer: Enhancing Activity and Selectivity by Borate–Polyol Coordination Chemistry

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