An Electrochemical Non‐Enzymatic Glucose Sensor Based on Ultrathin PdAg Single‐Crystalline Nanowires

Xu, Xiaoxiang; Lv, Hao; Sun, Lizhi; Song, Peng; Liu, Ben; Chen, Xiong

doi:10.1002/cplu.202000141

Cited by 7 publications

(8 citation statements)

References 40 publications

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“…89 Another type of double-chain organo-ammonium halide has been employed in the growth of Pd-based alloy nanowires in aqueous solutions. A typical system carries the reaction in aqueous solution, with dioctadecyldimethylammonium chloride (DODAC) 90,91 as the structure-directing reagent and L-ascorbic acid as the reductant. The aqueous solution favours the usage of the L-ascorbic acid, while the hydrophobic carbonyl reagents are not compatible for this synthesis.…”

Section: Organoammoniummentioning

confidence: 99%

Recent progress on the synthesis of metal alloy nanowires as electrocatalysts

Jin

Wang

2023

Nanoscale

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Section: Organoammoniummentioning

confidence: 99%

Recent progress on the synthesis of metal alloy nanowires as electrocatalysts

Jin

Wang

2023

Nanoscale

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“…The as‐prepared sensor exhibited a linear glucose range of 0.1 × 10 −3 to 8 × 10 −3 m , a low detection limit of 0.51 × 10 −6 m , and good stability (up to 1 month) for electrochemical glucose sensor. [ 56 ] Moreover, the interface construction of ternary alloys is helpful to strengthen the synergistic effect of the metal interface. In another work, PdCuPt trimetallic nanocrystals (TNCs) with branched structures were synthesized by a template method (Figure 5d).…”

Section: Surface and Structure Constructionmentioning

confidence: 99%

Noble Metal Construction for Electrochemical Nonenzymatic Glucose Detection

Asif

Liu

et al. 2022

Adv Materials Technologies

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transistor, [6] electrochemical glucose sensors with superior selectivity, sensitivity, and portability have aroused great interest of researchers. [7] In the past few decades, most researches have focused on the traditional glucose sensors, which are based on the immobilization of glucose oxidase on various substrates. [8,9] Among them, the catalytic oxidation of glucose is carried out under a certain voltage, and an electrical signal is output. These enzyme-based sensors display good selectivity and high sensitivity in glucose detection, but the enzyme activity is susceptible to pH, temperature, and toxic chemicals. [10] Nonenzymatic glucose sensors mainly depend on the current response of glucose directly oxidized on the surface of nanomaterials modified electrode, which shows higher stability than the enzyme-based glucose biosensor. [11] Therefore, great efforts have been made to develop novel nonenzymatic glucose sensors to solve the instability problem associated with enzyme-based catalysts. The low potential for catalyzing the glucose oxidation is critical for the stability of enzyme-free glucose sensors. Noble metal-based catalysts have been widely investigated for glucose sensing due to their lower redox potential, ranging between 0.1 and 0.5 V versus Ag/AgCl or saturated calomel electrode (SCE) reference electrodes, and high selectivity without interference from maltose, ascorbic, uric acid, and other biomolecules. Benefiting from these advantages, the noble metal-based glucose sensors also possess good stability and reproducibility. [12,13] However, noble metal catalysts with smooth surface and simple structure lack enough active sites, which directly affect the adsorption of glucose molecules and the desorption of glucose oxidation products, and further lead to poor sensitivity and stability of the enzyme-free glucose sensor. [14] Electrocatalytic glucose oxidation is a type of heterogenous catalytic reaction that occurs on the surfaces and interfaces of noble-metal-based nanostructures and electrolytes. It is generally believed that the activity, selectivity, and stability of electrocatalysts are sensitive to the surface and interface, which are not only related to their morphology, structure, and composition, but also closely related to the adsorption strength of reactant molecules or intermediates. [15,16] In this sense, each step should be beneficial to adsorption and desorption, thereby promoting the whole catalytic reaction. Sufficient active sites are the key to catalytic performance, which largely depends on the surface and interface state. In order to improve the catalytic ability of NM catalysts Precise glucose monitoring is needed to meet the growing demand of blood glucose determination in diabetes diagnosis. In spite of good selectivity and high sensitivity of enzyme-based glucose sensors, the activity of enzyme is sensitive to pH and temperature, which makes them unstable in detecting glucose level. Alternatively, nonenzymatic electrocatalysts have attracted intensive attention because o...

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“…Increasing the dimension and optimizing the crystallinity represent two of the most effective routes to enhance the structural stability of Pd-based electrocatalysts. Of the various nanostructures available, 1D ultrathin nanowires (UNWs) have received more attention due to their high structural anisotropy. − They expose more active sites and strengthen physical contractions on contiguous supports/electrodes, remarkably enhancing catalytic stability. More interestingly, a surface contraction effect can be produced, when downsizing UNWs to 1–3 nm, which would further enhance their catalytic performance. − Furthermore, if anisotropic UNWs are single-crystalline, the faster adsorption/desorption of reactants and better electron transfer would accelerate catalytic kinetics and synergistically enhance their activity and stability. ,,, Therefore, novel high-performance electrocatalysts that have these multiple advantages, including UNW and defect-rich structure and bimetallic PdCu alloy, can be rationally designed for EOR electrocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Defect-Rich and Single-Crystalline PdCu Ultrathin Nanowires Promoting Ethanol Oxidation Electrocatalysis

Lin

Jia

et al. 2022

ACS Appl. Energy Mater.

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Developing high-performance electrocatalysts for the ethanol oxidation reaction (EOR) is greatly significant for the practical application of direct ethanol fuel cells, but it is still unsatisfactory. In this manuscript, we reported a facile aqueous synthesis of PdCu ultrathin nanowires (UNWs) as a highly active and stable electrocatalyst for EOR electrocatalysis. The synthesis relied on the columnar nucleation of PdCu alloys via co-reduction of Pd and Cu precursors in an aqueous solution with a highly hydrophobic dioctadecyldimethylammonium chloride as the structure-directing surfactant. PdCu UNWs featured ultrathin diameter (∼3.2 nm), defect-rich surface (high-index site), single-crystalline structure, and well-alloyed composition. They disclosed the remarkable mass activity of 3.02 A mgPd –1 and the good chronoamperometric and cycling stability for EOR electrocatalysis, both of which are better than its counterpart catalysts and commercial Pd/C. Mechanism studies further confirmed that PdCu UNWs had much better diffusion ability and lower activation energy based on their structural and compositional add-in synergies.

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An Electrochemical Non‐Enzymatic Glucose Sensor Based on Ultrathin PdAg Single‐Crystalline Nanowires

Cited by 7 publications

References 40 publications

Recent progress on the synthesis of metal alloy nanowires as electrocatalysts

Recent progress on the synthesis of metal alloy nanowires as electrocatalysts

Noble Metal Construction for Electrochemical Nonenzymatic Glucose Detection

Defect-Rich and Single-Crystalline PdCu Ultrathin Nanowires Promoting Ethanol Oxidation Electrocatalysis

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