2023
DOI: 10.1039/d3nr01039b
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Insights into the enhanced electrochemical sensing behavior of hydroquinone and catechol simultaneously enabled by ultrafine layer CoP–NiCoP heterostructure on graphene frameworks

Abstract: Hydroquinone (HQ) and catechol (CC), two major dihydroxybenzene isomers, are toxic pollutants coexisted and impede each other in the process of sample identification. Well defined nanostructure and interface engineering enable...

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Cited by 8 publications
(5 citation statements)
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“…As illustrated in Figure f, a remarkably enhanced peak current is observed in Ru SA/GFs, significantly surpassing that of Ru NP/GFs. The electrochemically active area of Ru SA/GFs (0.06885 cm 2 ) is larger than that of Ru NP/GFs (0.05627 cm 2 ), which is obtained following the Randles–Sevcik equation I p = 2.69 × 10 5 A D 1 / 2 n 3 / 2 ν 1 / 2 c where I p represents the peak current (A), n is the electron transfer number, c denotes the probe concentration (mol cm –3 ), v stands for the scan rate (V s –1 ), D is the diffusion coefficient, and A stands for the working electrode area (cm 2 ). In addition, a range of various modified electrodes’ interfacial electron transfer rates ( k s ) are subsequently examined employing Laviron’s equation , log nobreak0em0.25em⁡ k s = α 0.25em log ( 1 α ) + ( 1 α ) log nobreak0em0.25em⁡ α log ( italicRT nF ν ) α ( 1 α ) italicnF normalΔ E p 2.3 italicRT where Δ E p denotes the redox peak separation, R , v , n , α , and F are the same as the above Laviron’s equation.…”
Section: Results and Discussionmentioning
confidence: 99%
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“…As illustrated in Figure f, a remarkably enhanced peak current is observed in Ru SA/GFs, significantly surpassing that of Ru NP/GFs. The electrochemically active area of Ru SA/GFs (0.06885 cm 2 ) is larger than that of Ru NP/GFs (0.05627 cm 2 ), which is obtained following the Randles–Sevcik equation I p = 2.69 × 10 5 A D 1 / 2 n 3 / 2 ν 1 / 2 c where I p represents the peak current (A), n is the electron transfer number, c denotes the probe concentration (mol cm –3 ), v stands for the scan rate (V s –1 ), D is the diffusion coefficient, and A stands for the working electrode area (cm 2 ). In addition, a range of various modified electrodes’ interfacial electron transfer rates ( k s ) are subsequently examined employing Laviron’s equation , log nobreak0em0.25em⁡ k s = α 0.25em log ( 1 α ) + ( 1 α ) log nobreak0em0.25em⁡ α log ( italicRT nF ν ) α ( 1 α ) italicnF normalΔ E p 2.3 italicRT where Δ E p denotes the redox peak separation, R , v , n , α , and F are the same as the above Laviron’s equation.…”
Section: Results and Discussionmentioning
confidence: 99%
“…where E signifies the standard electrode potential, F represents the Faraday constant, k is the rate constant, T is the thermodynamic temperature, R is the gas constant, ν is the 3f, a remarkably enhanced peak current is observed in Ru SA/GFs, significantly surpassing that of Ru NP/GFs. The electrochemically active area of Ru SA/GFs (0.06885 cm 2 ) is larger than that of Ru NP/GFs (0.05627 cm 2 ), which is obtained following the Randles−Sevcik equation 43…”
Section: Electrochemical Behavior Ofmentioning
confidence: 99%
“…This heterojunction exhibited enhanced electrocatalytic activity toward HQ and CC compared to CoP/GFs, NiCoP/GFs, and GFs alone. The formation of a heterojunction interface optimized the chemisorption of HQ and CC, reducing the activation energy for the hydrogen dissociation reaction and facilitating the electrocatalytic oxidation reaction of both molecules [88]. This class of catalysts has also demonstrated sensitive detection capabilities for various molecules, including dopamine [89][90][91][92][93], isoprenaline [94,95], and chloramphenicol [96].…”
Section: Transition Metal Phosphidesmentioning
confidence: 99%
“…The recently reported mechanisms of self-healing hydrogels are mainly based on hydrogen bonding interactions, Schiff base reactions, host–guest interactions, ionic interactions, etc . 23–26 Jiang's group synthesized a hydrogel based on a polyvinyl alcohol hydrogen bonding network, and the hydrogel exhibited rapid self-healing ability by the combined action of numerous hydrogen bonding networks. 27 Zhang's group explored a rapid self-healing hydrogel cross-linked by acylhydrazone bonds.…”
Section: Introductionmentioning
confidence: 99%