Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution

Luo, Ma; Cai, Zhao; Wang, Cheng; Bi, Yongmin; Li, Qian; Hao, Yongchao; Li, Li; Kuang, Yun; Li, Yaping; Lei, Xiaodong; Huo, Ziyang; Li, Wen; Wang, Hailiang; Sun, Xiaoming; Duan, Xue

doi:10.1007/s12274-017-1437-2

Cited by 159 publications

(120 citation statements)

References 45 publications

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“…[29,36,37] The bandsat645 and 471 cm À1 was related to CoÀOa nd NiÀOs tretching vibrations, respectively,f urther verifying the formation of NiCo-LDH. [27,28,41] For the HNP and NF sample, the band at 1306 cm À1 could be ascribed to the N-O vibration, suggesting the intercalation of NO 3 À ions that originated from the reactant nickel nitrate, [29,36,37] and the band at 1055cm À1 is associated with typicala lcoholic CÀOs tretching mode of solvent etha- nol. [27,28,41] For the HNP and NF sample, the band at 1306 cm À1 could be ascribed to the N-O vibration, suggesting the intercalation of NO 3 À ions that originated from the reactant nickel nitrate, [29,36,37] and the band at 1055cm À1 is associated with typicala lcoholic CÀOs tretching mode of solvent etha- nol.…”

Section: Resultsmentioning

confidence: 96%

“…[25,[27][28][29] The band at 1614 cm À1 could be ascribed to the bending mode of OÀHvibration. [25,[27][28][29] The band at 1614 cm À1 could be ascribed to the bending mode of OÀHvibration.…”

Section: Resultsmentioning

confidence: 99%

“…[20][21][22][23] However,t he structural instability and poor electrical conductivity may lead to reducede lectroactive surfacea rea and sluggish electron-transfer process, thus deterioratingt he electrochemical performance. [25][26][27][28][29] In parallel to these strategies, nanostructured engineering has been provent ob ea ne ffective approach to furtherb oost the electrochemical performance of materials by increasing the exposure of electroactives ites, enhancing the mass and charge transport, and alleviating the volume change andp article aggregation during redox reactions. [25][26][27][28][29] In parallel to these strategies, nanostructured engineering has been provent ob ea ne ffective approach to furtherb oost the electrochemical performance of materials by increasing the exposure of electroactives ites, enhancing the mass and charge transport, and alleviating the volume change andp article aggregation during redox reactions.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐Anion Intercalated Layered Double Hydroxide Nanosheet‐Assembled Hollow Nanoprisms with Improved Pseudocapacitive and Electrocatalytic Properties

Han

Cheng

et al. 2018

Chemistry An Asian Journal

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Electrochemically active hollow nanostructured materials hold great promise in diverse energy conversion and storage applications, however, intricate synthesis steps and poor control over compositions and morphologies have limited the realization of delicate hollow structures with advanced functional properties. In this study, we demonstrate a one-step wet-chemical strategy for co-engineering the hollow nanostructure and anion intercalation of nickel cobalt layered double hydroxide (NiCo-LDH) to attain highly electrochemical active energy conversion and storage functionalities. Self-templated pseudomorphic transformation of cobalt acetate hydroxide solid nanoprisms using nickel nitrate leads to the construction of well-defined NiCo-LDH hollow nanoprisms (HNPs) with multi-anion intercalation. The unique hierarchical nanosheet-assembled hollow structure and efficiently expanded interlayer spacing offer an increased surface area and exposure of active sites, reduced mass and charge transfer resistance, and enhanced stability of the materials. This leads to a significant improvement in the pseudocapacitive and electrocatalytic properties of NiCo-LDH HNP with respect to specific capacitance, rate and cycling performance, and OER overpotential, outperforming most of the recently reported NiCo-based materials. This work establishes the potential of manipulating sacrificial template transformation for the design and fabrication of novel classes of functional materials with well-defined nanostructures for electrochemical applications and beyond.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi‐Anion Intercalated Layered Double Hydroxide Nanosheet‐Assembled Hollow Nanoprisms with Improved Pseudocapacitive and Electrocatalytic Properties

Han

Cheng

et al. 2018

Chemistry An Asian Journal

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“…Subsequently, the formed Ni 2 Co III Fe-LDH/N-GO with metalOC and metalNC bonds may adjust the electron density of the metal sites. [36] Furthermore, the pyridinic-N and graphic-N in N-GO ( Figure S9, Supporting Information) can alter the electron density of carbon atoms so as to have a positive impact on the adsorption of O 2 and the breaking of OO bonds in the ORR process. Similar phenomenon was found for Co sites.…”

Section: Resultsmentioning

confidence: 99%

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

Zhou

Cai

Lei

et al. 2017

Advanced Energy Materials

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311

158

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Ternary NiCoFe‐layered double hydroxide (NiCoIIIFe‐LDH) with Co3+ is grafted on nitrogen‐doped graphene oxide (N‐GO) by an in situ growth route. The array‐like colloid composite of NiCoIIIFe‐LDH/N‐GO is used as a bifunctional catalyst for both oxygen evolution/reduction reactions (OER/ORR). The NiCoIIIFe‐LDH/N‐GO array has a 3D open structure with less stacking of LDHs and an enlarged specific surface area. The hierarchical structure design and novel material chemistry endow high activity propelling O2 redox. By exposing more amounts of Ni and Fe active sites, the NiCoIIIFe‐LDH/N‐GO illustrates a relatively low onset potential (1.41 V vs reversible hydrogen electrode) in 0.1 mol L−1 KOH solution under the OER process. Furthermore, by introducing high valence Co3+, the onset potential of this material in ORR is 0.88 V. The overvoltage difference is 0.769 V between OER and ORR. The key factors for the excellent bifunctional catalytic performance are believed to be the Co with a high valence, the N‐doping of graphene materials, and the highly exposed Ni and Fe active sites in the array‐like colloid composite. This work further demonstrates the possibility to exploit the application potential of LDHs as OER and ORR bifunctional electrochemical catalysts.

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“…For example, Hu and co-workers [33] found an OER onset potential of 1.48 V for NiFe LDH by exfoliating LDH to single-layer nanosheet and exposing more metal sites. Dai's group [34] has anchored NiFe LDHs on conductive carbon nanotube to enhance the conductivity, thus improving their OER activity with an early onset potential of 1.45 V. Luo et al [35] intercalated phosphorus oxoanions into NiFe LDHs to tune the surface electronic structure, and 1.45 V was also obtained for the onset potential. Moreover, by combining the abovementioned methods, the OER onset potential of NiFe LDH can be much improved, but still larger than 1.40 V so far [36].…”

Section: Introductionmentioning

confidence: 99%

A highly-efficient oxygen evolution electrode based on defective nickel-iron layered double hydroxide

et al. 2018

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Exploring efficient and cost-effective electrocatalysts for oxygen evolution reaction (OER) is critical to water splitting. While nickel-iron layered double hydroxide (NiFe LDH) has been long recognized as a promising nonprecious electrocatalyst for OER, its intrinsic activity needs further improvement. Herein, we design a highly-efficient oxygen evolution electrode based on defective NiFe LDH nanoarray. By combing the merits of the modulated electronic structure, more exposed active sites, and the conductive electrode, the defective NiFe LDH electrocatalysts show a low onset potential of 1.40 V (vs. RHE). An overpotential of only 200 mV is required for 10 mA cm −2 , which is 48 mV lower than that of pristine NiFe-LDH. Density functional theory plus U (DFT+U) calculations are further employed for the origin of this OER activity enhancement. We find the introduction of oxygen vacancies leads to a lower valance state of Fe and the narrowed bandgap, which means the electrons tend to be easily excited into the conduction band, resulting in the lowered reaction overpotential and enhanced OER performance.

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Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution

Cited by 159 publications

References 45 publications

Multi‐Anion Intercalated Layered Double Hydroxide Nanosheet‐Assembled Hollow Nanoprisms with Improved Pseudocapacitive and Electrocatalytic Properties

Multi‐Anion Intercalated Layered Double Hydroxide Nanosheet‐Assembled Hollow Nanoprisms with Improved Pseudocapacitive and Electrocatalytic Properties

NiCoFe‐Layered Double Hydroxides/N‐Doped Graphene Oxide Array Colloid Composite as an Efficient Bifunctional Catalyst for Oxygen Electrocatalytic Reactions

A highly-efficient oxygen evolution electrode based on defective nickel-iron layered double hydroxide

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