A single-atom Cu–N<sub>2</sub>catalyst eliminates oxygen interference for electrochemical sensing of hydrogen peroxide in a living animal brain

Gao, Xiaolong; Ma, Wenjie; Mao, Junjie; He, Chun‐Ting; Ji, Wenliang; Chen, Zheng; Wu, Wenjie; Yu, Ping; Mao, Lanqun

doi:10.1039/d1sc04755h

Cited by 43 publications

(36 citation statements)

References 72 publications

(67 reference statements)

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“…Beneting from the atomically dispersed metal active centers, single-atom catalysts (SACs) have the maximum extent of metal dispersion and atomic utilization, and have become the most promising materials to realize the rational utilization of metal resources and atomic economy. [25][26][27] The strong interaction between metal atoms and carrier materials is very signicant for keeping the atomic dispersion of metal active centers and preventing agglomeration into particles. [28][29][30][31] Carbon materials have been proven to be ideal carrier materials because of their adjustable structure, excellent conductivity, stable physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Dou

Sun

et al. 2022

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Dou

Sun

et al. 2022

J. Mater. Chem. A

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“…Various earth-abundant transition metal-based compounds have aroused intensive research interest as alternatives, and nowadays some of them have shown considerable performance. [10][11][12][13] However, dynamic reconstruction usually occurs in most these compounds under working processes, which makes it hard to recognize really catalytic origins and structure-property relationships. [14] Therefore, studying dynamic reconstruction, despite being challenging, opens a novel avenue to uncover catalytic mechanisms and develop design principles toward highperformance catalysts.…”

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confidence: 99%

Chameleon‐Like Reconstruction on Redox Catalysts Adaptive to Alkali Water Electrolysis

Liu

Qiao

Zhu

et al. 2022

Small

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Pre‐catalyst reconstruction in electrochemical processes has recently attracted intensive attention with mechanistic potentials to uncover really active species and catalytic mechanisms and advance targeted catalyst designs. Here, nickel‐molybdenum oxysulfide is deliberately fabricated as pre‐catalyst to present a comprehensive study on reconstruction dynamics for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkali water electrolysis. Operando Raman spectroscopy together with X‐ray photoelectron spectroscopy and electron microscopy capture dynamic reconstruction including geometric, component and phase evolutions, revealing a chameleon‐like reconstruction self‐adaptive to OER and HER demands under oxidative and reductive conditions, respectively. The in situ generated active NiOOH and Ni species with ultrafine and porous textures exhibit superior OER and HER performance, respectively, and an electrolyzer with such two reconstructed electrodes demonstrates steady overall water splitting with an extraordinary 80% electricity‐to‐hydrogen (ETH) energy conversion efficiency. This work highlights dynamic reconstruction adaptability to electrochemical conditions and develops an automatic avenue toward the targeted design of advanced catalysts.

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“…In fact, electrochemical sensing of H 2 O 2 can avoid oxidative decomposition interferences from common chemical and biochemical interfering species. However, the oxygen reduction reaction (ORR) of dissolved oxygen in the solution at a similar reductive potential is a major challenge to the electrochemical sensing of H 2 O 2 . − Currently, most of the reported H 2 O 2 electrochemical sensors are tested in degassed electrolytes protected by inert or nitrogen atmospheres. To avoid interference from ORR under ambient conditions, a reasonable electrochemical sensing window is necessary.…”

Section: Resultsmentioning

confidence: 99%

Defect Engineering To Tailor Metal Vacancies in 2D Conductive Metal–Organic Frameworks: An Example in Electrochemical Sensing

Luo

Braun

et al. 2022

ACS Nano

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Two-dimensional conductive metal–organic frameworks (2D conductive MOFs) with π–d conjugations exhibit high electrical conductivity and diverse coordination structures, making them constitute a desirable platform for new electronic devices. Defects are inevitable in the self-assembly process of 2D conductive MOFs. Arguably, defect engineering that deliberately manipulates defects demonstrates great potential to enhance the electrocatalytic activity of this family of novel materials. Herein, a facile and universal defect engineering strategy is proposed and demonstrated for metal vacancy regulation of metal benzenehexathiolato (BHT) coordination polymer films. Controllable metal vacancies can be produced by simply tuning the proton concentration during the confined self-assembly process at the liquid–liquid interface. This facile but universal defect design strategy has been proven to be effective in a class of materials including Cu-BHT, Ni-BHT, and Ag-BHT for physicochemical regulation. To further demonstrate the feasibility and practicality in electrochemical applications, the elaborately fabricated Cu-BHT films with abundant Cu vacancies deliver competitive performance in electrocatalytic sensing of H2O2. Mechanistic analysis revealed that the Cu vacancies act as effective active sites for adsorption and reduction of H2O2, and the tuned electronic structure boosts the electrocatalytic reaction. The developed advanced sensing platform confirms the excellent commercial potential of Cu-BHT sensors for H2O2. The findings provide insights into the molecular structure design of 2D conducting MOFs by defect engineering and demonstrate the commercial potential of Cu-BHT electrochemical sensors.

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A single-atom Cu–N₂catalyst eliminates oxygen interference for electrochemical sensing of hydrogen peroxide in a living animal brain

Abstract: We have achieved the selective monitoring of H2O2 fluctuation in vivo free from O2 interference by a single-atom Cu–N2 electrocatalyst.

Cited by 43 publications

References 72 publications

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Chameleon‐Like Reconstruction on Redox Catalysts Adaptive to Alkali Water Electrolysis

Defect Engineering To Tailor Metal Vacancies in 2D Conductive Metal–Organic Frameworks: An Example in Electrochemical Sensing

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A single-atom Cu–N2catalyst eliminates oxygen interference for electrochemical sensing of hydrogen peroxide in a living animal brain

Abstract: We have achieved the selective monitoring of H2O2 fluctuation in vivo free from O2 interference by a single-atom Cu–N2 electrocatalyst.

Cited by 43 publications

References 72 publications

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Rational design, application and dynamic evolution of Cu–N–C single-atom catalysts

Chameleon‐Like Reconstruction on Redox Catalysts Adaptive to Alkali Water Electrolysis

Defect Engineering To Tailor Metal Vacancies in 2D Conductive Metal–Organic Frameworks: An Example in Electrochemical Sensing

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A single-atom Cu–N₂catalyst eliminates oxygen interference for electrochemical sensing of hydrogen peroxide in a living animal brain