Insights into the transition metal ion-mediated electrooxidation of glucose in alkaline electrolyte

Zheng, Weiran; Li, Yong; Lee, Yoon Suk

doi:10.1016/j.electacta.2019.04.007

Cited by 30 publications

(16 citation statements)

References 58 publications

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“…Yet, the electrocatalysts based on earth-abundant elements, such as Cu (Zheng et al, 2019a), Co (Madhura et al, 2020), and Ni (Chen et al, 2016), are preferred due to their low cost. In these systems, an M x /M x+1 (x = 2 for Cu and Ni; x = 3 for Co) redox cycle (Zheng et al, 2019b) is often proposed as the mechanism. Yet, their high toxicity toward cells and proteins cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Zheng

Tsang

et al. 2021

iScience

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Bismuth is the least toxic element among heavy metals, an outstanding advantage for environmental and health considerations. Yet, utilizing bismuth as anodic electrocatalyst is hindered by the formation of a spreading Bi(OH) 3 inhibitor layer during the anodic process. Herein, we report that bismuth nanoparticles, produced using laser ablation, can avoid such drawbacks. The production of Bi(V) species assists polyol electrooxidation. For glucose, instead of the commonly reported gluconic acid as the product, the Bi(V) species enables highly selective oxidation and C-C bond cleavage to produce arabinonic acid, erythronic acid, and eventually glyceric acid. We not only generate high-valent Bi(V) species for catalytic applications, especially for bioelectrocatalysis where the less toxic bismuth is highly appreciated, but also present Bi nanoparticle as a highly selective electrocatalyst that can break C-C bond. We believe that Bi electrocatalyst can find broader applications in electrochemical biomass conversion and electrosynthesis.

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Section: Introductionmentioning

confidence: 99%

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Zheng

Tsang

et al. 2021

iScience

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“…43 The x-intercept of the Nyquist plot represents the non-compensated resistance (R s ) that is the sum of the resistances from electrode and electrolyte. 44 As shown in Table S4, the R ct of CN/LDH-3 (26.76 Ω) is significantly decreased compared with both 2D-C 3 N 4 (126.4 Ω) and LDH-3 (81.93 Ω), indicating a facilitated charge transport kinetics between LDH-3 and 2D-C 3 N 4 . 45 Photoluminescence (PL) behavior originates from the recombination of photoinduced electron−hole pairs, which can reveal the separation and transformation of photogenerated charge carriers.…”

Section: Methodsmentioning

confidence: 90%

“…All samples exhibit a semicircle and a straight line in the high- and low-frequency regions, which correspond to the charge transfer resistance ( R ct ) and diffusion resistance ( Z w ), respectively . The x -intercept of the Nyquist plot represents the non-compensated resistance ( R s ) that is the sum of the resistances from electrode and electrolyte . As shown in Table S4, the R ct of CN/LDH-3 (26.76 Ω) is significantly decreased compared with both 2D-C 3 N 4 (126.4 Ω) and LDH-3 (81.93 Ω), indicating a facilitated charge transport kinetics between LDH-3 and 2D-C 3 N 4 …”

Section: Resultsmentioning

confidence: 99%

Interface Engineering of a 2D-C₃N₄/NiFe-LDH Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Yan

Zhang

Zheng

et al. 2021

ACS Appl. Mater. Interfaces

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Photocatalytic water splitting offers an economic and sustainable pathway for producing hydrogen as a zero-emission fuel, but it still suffers from low efficiencies limited by visible-light absorption capacity and charge separation kinetics. Herein, we report an interface-engineered 2D-C3N4/NiFe layered double hydroxide (CN/LDH) heterostructure that shows highly enhanced photocatalytic hydrogen evolution reaction (HER) rate with excellent long-term stability. The morphology and band gap structure of NiFe-LDH are precisely regulated by employing NH4F as a structure-directing agent, which enables a fine interfacial tuning via coupling with 2D-C3N4. The formation of a type II interface in CN/LDH enlarges the active surface area and promotes the charge separation efficiency, leading to an HER rate of 3087 μmol g–1 h–1, which is 14 times higher than that of 2D-C3N4. This study highlights a rational interface engineering strategy for the formation of a heterostructure with a proper hole transport co-catalyst for designing effective water-splitting photocatalysts.

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“…The mechanism of the nonenzymatic electrochemical oxidation of glucose over CuO/ZnO-DSDSHNM electrode could be explained by the semiconductive nature of CuO/ZnO 52 . Herein, despite several types of research that have introduced Cu(3 +) as the active intermediate for the oxidation of glucose 53 , the formation of holes over the semi-conductive surface of CuO/ZnO is considered responsible.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive non-enzymatic electrochemical glucose sensor based on dumbbell-shaped double-shelled hollow nanoporous CuO/ZnO microstructures

Haghparas

Kordrostami

Sorouri

et al. 2021

Sci Rep

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A high-performance non-enzymatic glucose sensor based on hybrid metal-oxides is proposed. Dumbbell-shaped double-shelled hollow nanoporous CuO/ZnO microstructures (CuO/ZnO-DSDSHNM) were prepared via the hydrothermal method using pluronic F-127 as a surfactant. This structure is studied by various physicochemical characterizations such as scanning electron microscopy, X-ray diffraction spectroscopy, inductively coupled plasma atomic emission spectroscopy, elemental mapping techniques, X-ray photoelectron spectroscopy, and transmission electron microscopy. This unique CuO/ZnO-DSDSHNM provides both a large surface area and an easy penetrable structure facilitating improved electrochemical reactivity toward glucose oxidation. The prepared CuO/ZnO-DSDSHNM was used over the glassy carbon electrode (GCE) as the active material for glucose detection and then coated by Nafion to provide the proposed Nafion/CuO/ZnO-DSDSHNM/GCE. The fabricated glucose sensor exhibits an extremely wide dynamic range from 500 nM to 100 mM, a sensitivity of 1536.80 µA mM−1 cm−2, a low limit of detection of 357.5 nM, and a short response time of 1.60 s. The proposed sensor also showed long-term stability, good reproducibility, favorable repeatability, excellent selectivity, and satisfactory applicability for glucose detection in human serum samples. The achieved high-performance glucose sensing based on Nafion/CuO/ZnO-DSDSHNM/GCE shows that both the material synthesis and the sensor fabrication methods have been promising and they can be used in future researches.

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Insights into the transition metal ion-mediated electrooxidation of glucose in alkaline electrolyte

Cited by 30 publications

References 58 publications

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Interface Engineering of a 2D-C₃N₄/NiFe-LDH Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Highly sensitive non-enzymatic electrochemical glucose sensor based on dumbbell-shaped double-shelled hollow nanoporous CuO/ZnO microstructures

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Insights into the transition metal ion-mediated electrooxidation of glucose in alkaline electrolyte

Cited by 30 publications

References 58 publications

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Stabilizer-free bismuth nanoparticles for selective polyol electrooxidation

Interface Engineering of a 2D-C3N4/NiFe-LDH Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution

Highly sensitive non-enzymatic electrochemical glucose sensor based on dumbbell-shaped double-shelled hollow nanoporous CuO/ZnO microstructures

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Interface Engineering of a 2D-C₃N₄/NiFe-LDH Heterostructure for Highly Efficient Photocatalytic Hydrogen Evolution