An electrochemical modification strategy to fabricate NiFeCuPt polymetallic carbon matrices on nickel foam as stable electrocatalysts for water splitting

Zhang, Ziqi; Li, Yiduo; Zhang, Zhe; He, Zheng; Liu, Yuxin; Yan, Yuxing; Li, Chunguang; Lu, Haiyan; Shi, Zhan; Feng, Shouhua

doi:10.1039/d2sc02845j

Cited by 11 publications

(6 citation statements)

References 67 publications

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“…4 and 5) images demonstrated the layered graphene-like structure of NGA-COF before electrochemical modi cation. After electrochemical deposition, NGA-COF@Pt catalyst was uniformly deposited on carbon paper substrate in the form of regular microcosmic arrays with the aid of the oriented electric eld force from the TiO 2 NTs CE 40 (Fig. 2c).…”

Section: Resultsmentioning

confidence: 99%

“…NGA-COF@Pt was prepared by an electrochemical modi cation strategy according to our previous work 40 with some modi cations. Electrochemical modi cations and measurements were performed by a CHI 660E electrochemical workstation with a three-electrode system, including a working electrode (WE), a counter electrode (CE) and a reference electrode (RE).…”

Section: Materials Synthesismentioning

confidence: 99%

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Single-Atom Platinum Sites with Asymmetric Coordination Environment on Fully Conjugated Covalent Organic Framework for Efficient Electrocatalysis

Shi,

Zhang,

Zhang

et al. 2023

Preprint

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Two-dimensional (2D) covalent organic frameworks (COFs) and their derivatives have been applied as electrocatalysts towards a wide range of reactions owing to their unique nanoscale pore configurations, stable periodic structures, abundant coordination sites and high surface area. This work aims to construct the first non-thermodynamically stable Pt-N2 coordination active site through electrochemically modifying platinum (Pt) single atoms into fully conjugated 2D COF as conductive agent-free and pyrolysis-free electrocatalyst for hydrogen evolution reaction (HER). In addition to maximizing atomic utilization, single-atom catalysts with definite structures can be used to investigate catalytic mechanisms and structure-activity relationships. A series of physical characterizations, theoretical calculations and in-situ experiments demonstrate that NGA-COF not only provide favorable metal-support effect for Pt, but also enhance electron transport ability and structural stability. The former can adjust the binding energy between active sites to H* intermediate by forming unique Pt-N2 instead of the mainstream Pt-N4 coordination environment. The latter is ascribed to its unique stability in acidic environments.

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Section: Resultsmentioning

confidence: 99%

Section: Materials Synthesismentioning

confidence: 99%

Single-Atom Platinum Sites with Asymmetric Coordination Environment on Fully Conjugated Covalent Organic Framework for Efficient Electrocatalysis

Shi,

Zhang,

Zhang

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…4 and 5) images demonstrated the layered graphene-like structure of NGA-COF before electrochemical modification. After electrochemical deposition, NGA-COF@Pt catalyst was uniformly deposited on carbon paper substrate in the form of regular microcosmic arrays with the aid of the oriented electric field force from the TiO 2 NTs CE 40 (Fig. 2c).…”

Section: Electrocatalyst Synthesismentioning

confidence: 99%

“…To verify that NGA-COF@Pt-2H has the potential for further practical applications, NGA-COF@Pt-2H was assembled into a two-electrode EWS cell as cathode, along with a RuTiIr dimensionally stable anode (DSA) 40 under simulating working condition (current density = 100 mA cm −2 , time = 260 hours). Supplementary Fig.…”

Section: Catalytic Mechanisms and Structure-activity Relationshipsmentioning

confidence: 99%

Single-atom platinum with asymmetric coordination environment on fully conjugated covalent organic framework for efficient electrocatalysis

Zhang,

Chen

et al. 2024

Nat Commun

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Two-dimensional (2D) covalent organic frameworks (COFs) and their derivatives have been widely applied as electrocatalysts owing to their unique nanoscale pore configurations, stable periodic structures, abundant coordination sites and high surface area. This work aims to construct a non-thermodynamically stable Pt-N2 coordination active site by electrochemically modifying platinum (Pt) single atoms into a fully conjugated 2D COF as conductive agent-free and pyrolysis-free electrocatalyst for the hydrogen evolution reaction (HER). In addition to maximizing atomic utilization, single-atom catalysts with definite structures can be used to investigate catalytic mechanisms and structure-activity relationships. In this work, in-situ characterizations and theoretical calculations reveal that a nitrogen-rich graphene analogue COF not only exhibits a favorable metal-support effect for Pt, adjusting the binding energy between Pt sites to H* intermediates by forming unique Pt-N2 instead of the typical Pt-N4 coordination environment, but also enhances electron transport ability and structural stability, showing both conductivity and stability in acidic environments.

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“…The notion of green and sustainable development, the utilization of renewable sources and the innovation of new resources for energy storage applications has been popular recently. Hence, hot spots were concentrated on oxygen/hydrogen evolution [1], water splitting [2], lithium ion batteries [3], especially supercapacitor electrode materials [4]. As a kind of promising material, biomass has lots of advantages such as low cost, easy preparation and environmental-friendly, thus some common biomass materials, such as rice husk [5], straw cellulose [6], household waste7 have been widely commercialized.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of N-doped Carbon Derived from Kiwi Fruit Peel for Advanced Supercapacitor

Wang¹,

Zhang²,

Li³

et al. 2023

AJST

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As a potential material, biomass material has become a hot spot for energy storage equipment because of its enhanced properties and environmental-friendly features. Waste kiwi fruit peel is a kind of biomass material with a natural macroporous structure. After carbonization, acid pickling and activation, the kiwi fruit peel carbon (KFPC) with a 3D porous structure composed of macropores, mesopores and micropores on its surface and inner channels, respectively. The morphology and structure of the KFPC are studied by scanning electron microscopy (SEM). The electrochemicial properties were analyzed in a three-electrode system. The cyclic voltammetry (CV) measurement at the scan rate of 5-100 mV s-1 in 2 M KOH aqueous electrolyte. The Galvanostatic charge/discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS) are used to calculate the specific capacitance and resistance, respectively. The KFPC exhibits a 2290 m2 g-1 specific surface area. The capacitor has a specific capacitance of 249.8F g− 1 at 1 A g− 1 and a capacity retention rate of 89.22 % after 5000 cycles at 5 A g− 1, indicating that the KFPC is relatively stable. After assembling the materials into a symmetric supercapacitor, it delivered a high energy density of 9.75 Wh kg-1, which reveals the promising application of KFPC in high-performance supercapacitors.

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An electrochemical modification strategy to fabricate NiFeCuPt polymetallic carbon matrices on nickel foam as stable electrocatalysts for water splitting

Abstract: Electrochemical modification is a mild and economical way to prepare electrocatalytic materials with abundant active sites and high atom efficiency. In this work, a stable NiFeCuPt carbon matrix deposited on...

Cited by 11 publications

References 67 publications

Single-Atom Platinum Sites with Asymmetric Coordination Environment on Fully Conjugated Covalent Organic Framework for Efficient Electrocatalysis

Single-Atom Platinum Sites with Asymmetric Coordination Environment on Fully Conjugated Covalent Organic Framework for Efficient Electrocatalysis

Single-atom platinum with asymmetric coordination environment on fully conjugated covalent organic framework for efficient electrocatalysis

Facile Fabrication of N-doped Carbon Derived from Kiwi Fruit Peel for Advanced Supercapacitor

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