Fabrication of Co(Ni)-P surface bonding states on core–shell Co(OH)2@P-NiCo-LDH towards electrocatalytic hydrogen evolution reaction

Song, Ning; Hong, Shihuan; Xiao, Mengya; Zuo, Yuefei; Jiang, Enhui; Li, Chunmei; Dong, Hongjun

doi:10.1016/j.jcis.2020.08.086

Cited by 64 publications

(22 citation statements)

References 47 publications

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“…Even though many previous studies have reported that the stability and conductivity of the pristine Ni(OH) 2 can be optimized via doping with metals such as Co , and Al, , such enhancements are not significant with respect to discharge voltage and specific capacity. In recent decades, transition-metal phosphates have drawn considerable research interests in the fields of supercapacitors, ,− batteries, ,− and electrocatalysis − because of their excellent electrical conductivity, active electrochemical properties, and good stability. It is widely known that the synergistic effect of Ni and Co species plays a critical role in the remarkable electrochemical performance of Ni–Co binary compounds. , Therefore, their binary compounds have superior performance to the monometallic counterparts and are considered to be a category of stable electrode materials .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Nickel–Cobalt Phosphates for High-Performance Hydrogen Gas Batteries and Self-Powered Water Splitting

Meng

Wang

Zhu

et al. 2021

ACS Appl. Energy Mater.

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Large-scale energy production and storage applications call for the development of advanced electrochemical systems including rechargeable batteries and water splitters, whose performances are largely determined by their active materials. In this work, we demonstrate an integrated hydrogen gas production and energy storage system by implementing a self-powered water splitter with hydrogen gas batteries. Such an integrated system is achieved by the application of a multifunctional nickel–cobalt phosphate (NCP) via a facile electrodeposition method. Due to the synergistic effect between Ni, Co, and phosphate ions, the NCP shows better redox reactions for energy storage and higher electrochemical activity than its hydroxide counterpart. When acting as a cathode, the NCP exhibits a high specific capacity of 278 mAh g–1 at 1.52 C, impressive rate performance, and outstanding cycling stability for over 12,000 cycles. Therefore, the assembled NCP–H2 battery based on the NCP cathode and H2 anode shows outstanding rate performance and long-term stability. Furthermore, an integrated water splitter using the NCP as bifunctional catalysts for hydrogen and oxygen evolution reactions is self-powered by the NCP–H2 battery, showing multifunctional properties of our NCP for potential energy production and storage applications.

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Section: Introductionmentioning

confidence: 99%

Multifunctional Nickel–Cobalt Phosphates for High-Performance Hydrogen Gas Batteries and Self-Powered Water Splitting

Meng

Wang

Zhu

et al. 2021

ACS Appl. Energy Mater.

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“…It suggested that the former is more likely to the hydrogen evolution reaction fundamentally . Moreover, for insights into the interfacial reaction kinetics, the Tafel slopes of samples are also calculated (Figure c); the Tafel slope of g-C 3 N 4 -4AAP 15 (267 mV dec –1 ) drops by about half relative to pure g-C 3 N 4 (564 mV dec –1 ), which suggests that the hydrogen evolution reaction kinetics is improved greatly . Based on the fact that electrochemical active surface area (ECSA) has a positive correlation with hydrogen evolution reaction sites, the double-layer capacitance ( C dl ) is carried out to estimate ECSA, which can be obtained by cyclic voltammetry with scan rates ranging from 20 to 100 mV s –1 outside faradic regions (Figure S3).…”

Section: Resultsmentioning

confidence: 99%

“…51 Moreover, for insights into the interfacial reaction kinetics, the Tafel slopes of samples are also calculated (Figure 7c); the Tafel slope of g-C 3 N 4 -4AAP 15 (267 mV dec −1 ) drops by about half relative to pure g-C 3 N 4 (564 mV dec −1 ), which suggests that the hydrogen evolution reaction kinetics is improved greatly. 52 Based on the fact that electrochemical active surface area (ECSA) has a positive correlation with hydrogen evolution reaction sites, the doublelayer capacitance (C dl ) is carried out to estimate ECSA, 53 which can be obtained by cyclic voltammetry with scan rates ranging from 20 to 100 mV s −1 outside faradic regions (Figure S3). As shown in Figure 7d, the larger C dl value for g-C 3 N 4 -4AAP 15 (0.0369 mF cm −2 ) in comparison with pure g-C 3 N 4 (0.0277 mF cm −2 ) determines that it has the higher ECSA, revealing more active sites for the hydrogen evolution reaction.…”

Section: Resultsmentioning

confidence: 99%

Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Dong

Zuo

Xiao

et al. 2021

ACS Appl. Mater. Interfaces

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Skeleton modification on carbon nitride (g-C3N4) via organic molecules is a recognized effective strategy to improve photocatalytic performance because it can powerfully improve charge separation in the skeleton plane. Herein, a diazole with a unique conjugated structure is bonded on edge of the g-C3N4 skeleton through a moderate polymerization of urea with 4-aminoantipyrine (4AAP). Meanwhile, the Pt nanoparticles selectively deposit on edge of the g-C3N4-4AAP15 nanosheet. It reveals that the robust limbic inducted and delocalized effects of diazole not only facilitate photogenerated electrons aggregation toward skeleton edge to promote in-plane carrier separation but also effectively stabilize and delocalize photogenerated electrons to improve carrier lifetime for propelling the photocatalytic hydrogen evolution (PHE) reaction. Specifically, the PHE rate over optimal g-C3N4-4AAP15 (284.2 μmol h–1) is 10 times that of pure g-C3N4 (27.6 μmol h–1) and the apparent quantum efficiency (AQE) at 420 nm reaches up to 24.2%. Through insights into the functionalized effect of small nitrogenous heterocycles introduced into the skeleton edge of g-C3N4, this work opens a new design thought for exploiting high-efficiency g-C3N4-based photocatalysts for photocatalytic application.

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“…In this report by Song et al., a core–shell structure consisting of Co(OH) 2 on top of P doped NiCo LDH (Co(OH) 2 @P‐NiCo‐LDH) was investigated. [ 234 ] It was proposed that Co(Ni) δ+ , ‐P δ− sites on the outer surface of NiCo‐LDH not only provided abundant active sites for HER but also enhanced the interfacial charge transfer. Furthermore, the robust core @ shell structure of the catalyst prevented agglomeration and restacking of the catalyst layers, thereby enhancing the stability of the catalyst.…”

Section: Zif‐67 and Its Derivatives As An Electrocatalysts For Water ...mentioning

confidence: 99%

Critical Review, Recent Updates on Zeolitic Imidazolate Framework‐67 (ZIF‐67) and Its Derivatives for Electrochemical Water Splitting

et al. 2022

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High surface area provides abundant active sites for catalytic reaction High Surface area Open crystal structure can exposes more interior atoms to provide more active sites Open crystal structure Organic linker acts as source of nitrogen source to improve the conductivity of overall matrix Organic linker Metal nanoparticles and metal complexes can be encapsulated inside MOFs to form guest@MOFs Tunable pore structure Figure 2.Advantages of the ZIF-67 for electrocatalytic application. The schematics of ZIF-67 was reproduced under the terms of the CC BY license. [468]

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Fabrication of Co(Ni)-P surface bonding states on core–shell Co(OH)2@P-NiCo-LDH towards electrocatalytic hydrogen evolution reaction

Cited by 64 publications

References 47 publications

Multifunctional Nickel–Cobalt Phosphates for High-Performance Hydrogen Gas Batteries and Self-Powered Water Splitting

Multifunctional Nickel–Cobalt Phosphates for High-Performance Hydrogen Gas Batteries and Self-Powered Water Splitting

Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Critical Review, Recent Updates on Zeolitic Imidazolate Framework‐67 (ZIF‐67) and Its Derivatives for Electrochemical Water Splitting

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