Bifunctional copper cathode induced oxidation of glycerol with liquid plasma discharge

Rao, Yuhan; Cao, Xun; Li, Chaojiang; Xiao, Longqiang

doi:10.1016/j.seppur.2019.03.043

Cited by 6 publications

(4 citation statements)

References 48 publications

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“…It makes it possible to convert waste glycerol from biodiesel plant to valuable DHA and split water for hydrogen generation at the same time. CuO nanoparticles produced during the liquid plasma discharge (LPD) method can effectively oxidize glycerol to valuable products, such as glyceric acid and GA. [ 72 ] Moreover, CoCu‐metal organic framework (MOF)/PANI was synthesized by the hydrothermal method and in situ polymerization. Due to the synergetic effect of CoCu‐MOF and PANI substrate, the catalyst exhibits excellent electrocatalytic activity and higher stability than that of commercial Pt/C.…”

Section: Electrocatalystsmentioning

confidence: 99%

Recent Progress in Electrocatalytic Glycerol Oxidation

et al. 2020

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Glycerol, as the major by‐product of biodiesel, can be oxidized into diverse value‐added chemical products via either traditional chemical methods or electrochemical routes. Electrocatalytic glycerol oxidation reaction (GOR) driven by renewable‐derived electricity (e.g., wind and solar) is a promising pathway for fine chemicals production. In an electrochemical cell, GOR can be coupled with various cathodic reactions, including hydrogen evolution reaction (HER), CO2 reduction reaction (CO2RR), and oxygen reduction reaction (ORR); in this manner, different benefits of either energy effectiveness or additional value‐added products can be obtained depending on the cathode reduction reaction selected. Comprehensively understanding of electrocatalytic GOR and the associated processes is of great significance to promote its industrial application. Herein, recent progress of GOR is focused on. The background of biomass‐derived glycerol valorization to energy and value‐added chemicals as well as the electrochemical conversion techniques via GOR is introduced. Then, the electrocatalytic reaction pathways, the potential application of GOR, and the measurement method for products are also discussed and summarized. Special emphasis is put on the design and the development of high‐selectivity and high‐activity electrocatalysts for GOR. Finally, the challenges and the future prospects in the fields of GOR are highlighted.

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Section: Electrocatalystsmentioning

confidence: 99%

Recent Progress in Electrocatalytic Glycerol Oxidation

et al. 2020

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“…This first-ever observed phenomenon is believed to unveil part of the catalytic mechanism in EOR. During the "Ostwald ripening", a large number of free electrons (from the valence band of Au) causes high localised temperature and are subsequently discharged at the tips of the atomic-scale active sites within a very short period [22][23][24][25]; when the ethanol molecules are physisorbed onto the surface of the Au thin film (meaning sitting on top of these nanostructures since they are taken in plane-view), the lateral migrations of the nanostructures might act as scissors and help to break the incoming ethanol molecules into smaller fractions (i.e., the CHx species) for more efficient oxidation, which in turn leads to the enhancement in the electrocatalytic performance in EOR.…”

Section: In-situ Observation Of Interactions Between Atomicscale Actimentioning

confidence: 99%

Flexible Au micro-array electrode with atomic-scale Au thin film for enhanced ethanol oxidation reaction

Cao

Peng

et al. 2020

Nano Res.

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The catalysis of Au thin film could be improved by fabrication of array structures in large area. In this work, nanoimprint lithography has been developed to fabricate flexible Au micro-array (MA) electrodes with ~ 100% coverage. Advanced electron microscopy characterisations have directly visualised the atomic-scale three-dimensional (3D) nanostructures with a maximum depth of 6 atomic layers. In-situ observation unveils the crystal growth in the form of twinning. High double layer capacitance brings about large number of active sites on the Au thin film and has a logarithmic relationship with mesh grade. Electrochemistry testing shows that the Au MAs perform much better ethanol oxidation reaction than the planar sample; MAs with higher mesh grade have a greater active site utilisation ratio (ASUR), which is important to build electrochemical double layer for efficient charge transfer. Further improvement on ASUR is expected for greater electrocatalytic performance and potential application in direct ethanol fuel cell.

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“…It is reported that array structures could provide a significant enhancement in many fields of study, such as catalysis [19][20][21][22][23], anti-reflection coatings [24,25], solar cells [26,27], optoelectronics [28], surface property modifications [29], and biomedical applications [30]. Recent research works demonstrated that improvement could originate from an increased SA/V ratio and surface energy content of the samples, the presence of active sites and defects, as well as the charge transfer rate [31,32]. These are exceptionally obvious in noble metals, which have hybridized bands in the d-orbital electrons.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Large-Area Ordered Au Nano-Ring Arrays for the Electrochemical Removal and Sensing of Rhodamine 6G Molecules

Cao

2023

Chemosensors

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To understand the formation process of ordered Au nano-ring arrays (NRA), a series of factors—including etchant gas and flow rate, chamber pressure and RF power—were systematically studied and a set of optimum parameters were deduced to fabricate this interesting structure. With plenty of active sites previously reported, a new role of ordered Au NRA is unlocked in this work. The ordered Au NRA could perform the electrochemical removal of rhodamine 6G (R-6G) at a high concentration in seawater within 12 min and complete discoloration within 9 min, which demonstrates ~7 times efficiency improvement from previous studies. The nanostructured surface also makes the ordered Au NRA a good substrate material in R-6G sensing using surface-enhanced Raman spectroscopy, which performs with better accuracy than the ultraviolet–visible light technique.

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Bifunctional copper cathode induced oxidation of glycerol with liquid plasma discharge

Cited by 6 publications

References 48 publications

Recent Progress in Electrocatalytic Glycerol Oxidation

Recent Progress in Electrocatalytic Glycerol Oxidation

Flexible Au micro-array electrode with atomic-scale Au thin film for enhanced ethanol oxidation reaction

Fabrication of Large-Area Ordered Au Nano-Ring Arrays for the Electrochemical Removal and Sensing of Rhodamine 6G Molecules

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