In situ surface engineering of nickel inverse opal for enhanced overall electrocatalytic water splitting

Zhou, Qingwen; Pu, Jun; Sun, Xiaolei; Zhu, Chao; Li, Jiachen; Wang, Jian; Chang, Shengli; Zhang, Huigang

doi:10.1039/c7ta03044d

Cited by 31 publications

(19 citation statements)

References 54 publications

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“…This is further evidenced by elemental mapping images (Figure 1g−l), where large spots appear at the end of CNF tips, while small ones exist in the nanofibers. The inset of Figure 1d shows the high-resolution TEM (HRTEM) image of a typical Ni 2 P nanoparticle, and a lattice spacing of 0.51 nm is observed, which agrees well with the (010) planes of hexagonal Ni 2 P. 32 The lattice with a spacing of 0.34 nm corresponds to the (002) plane of carbon shell coated on the core nanocrystal. 10,33 The crystalline structure of Ni 2 P@NPCNFs was characterized by XRD (Figure 2a).…”

Section: ■ Results and Discussionsupporting

confidence: 64%

In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

Yang

et al. 2018

ACS Sustainable Chem. Eng.

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A facile and cost-effective method has been developed for the fabrication of Ni 2 P nanoparticles encapsulated in N,P-codoped carbon nanofibers (Ni 2 P@NPCNFs) using the commercialized products of melamine polyphosphate (MPP) and Ni foam. During the synthetic process, MPP serves as the solid phosphorus source for the phosphidation of Ni foam, and it simultaneously performs as a carbon source for the in situ growth of functionalized carbon nanofibers, resulting in a favorable architecture of an Ni 2 P well-integrated carbon matrix. With this unique structure, the resultant Ni 2 P@NPCNFs electrode shows remarkable Li-ion storage performance, in terms of high reversible capacity and long-cyclic lifespan (850 mAh g −1 at 200 mA g −1 after 450 cycles), as well as a good rate behavior (300 mAh g −1 at 3200 mA g −1 ). This work not only presents a new avenue to construct advanced Ni 2 P-based functional nanocomposites for Li-ion batteries but also paves the way to explore unique transition-metal phosphides toward diverse applications.

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Section: ■ Results and Discussionsupporting

confidence: 64%

In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

Yang

et al. 2018

ACS Sustainable Chem. Eng.

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“…The low charge transfer resistance suggests the active HER kinetics at catalyst/electrolyte interfaces. [ 45,58 ] A close inspection of the intercept regions (Figure 5d) suggests that v‐NiS 2 has the lowest high‐frequency resistance ( R s ) of 2.1 Ω, indicating that S vacancies reduced the resistances of electron conduction and charge transfer. Four‐probe conductivity tests show that v‐NiS 2 has a lower conductivity of 20.03 mΩ cm −1 than NiS 2 (40.83 mΩ cm −1 ).…”

Section: Resultsmentioning

confidence: 99%

Sulfophobic and Vacancy Design Enables Self‐Cleaning Electrodes for Efficient Desulfurization and Concurrent Hydrogen Evolution with Low Energy Consumption

Zhang

Zhou

Shen

et al. 2021

Adv Funct Materials

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Sulfide oxidation reaction (SOR) is one central step of electrochemical desulfurization and sulfur‐based batteries. However, the electrochemical performance of desulfurization and sulfur batteries has been severely hindered by sulfur passivation. Here, a discovery of sulfophobic phenomenon of electrocatalysts having weak interaction to sulfur species is reported. A self‐cleaning NiS2 electrode is developed to avoid the long‐perplexing passivation issue of solid sulfur during the SOR. Furthermore, sulfur‐vacancies are engineered into NiS2 lattice to synthesize v‐NiS2 for the hydrogen evolution reaction (HER). The resultant lattice expansion and electron redistribution can adjust the adsorbed hydrogen to reach a nearly thermos‐neutral state, enabling high catalytic activity for the HER. By coupling the HER and SOR, efficient desulfurization and simultaneous hydrogen production is demonstrated. Bifunctional NiS2 enables such a one‐stone‐kills‐two‐birds strategy to realize continuous electrochemical desulfurization with superior energy efficiency (1.05 gsulfur Wh−1). As a general design principle, sulfophobic electrocatalysts can improve the properties of lithium–sulfur batteries by minimizing the passivation of S8 during charge. In brief, interfacial interaction between electrocatalysts and sulfur species are systematically investigated and a sulfophobic strategy to significantly enhance the electrochemical performance of the SOR is offered.

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“…Subsequently, Zhou et al prepared an inverse opal architecture containing a Ni/Ni 2 P heterostructure with accelerated mass transfer for an improved bifunctional property, where the OER activity can be further enhanced by Fe doping (Fe:Ni 2 P). [193] In contrast, Chen et al prepared an S-doped Ni/NiSP x heterostructure on NF (Ni/NiSP x /NF), which optimized the electronic structure of Ni active sites. [194] The prepared Ni/NiSP x /NF heterostructure .…”

Section: Tm/tmp Heterostructuresmentioning

confidence: 99%

Bifunctional Heterostructured Transition Metal Phosphides for Efficient Electrochemical Water Splitting

Zhang

Maijenburg

et al. 2020

Adv Funct Materials

412

273

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Reducing green hydrogen production costs is essential for developing a hydrogen economy. Developing cost-effective electrocatalysts for water electrolysis is thus of great research interest. Among various material candidates, transition metal phosphides (TMP) have emerged as robust bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) due to their various phases and tunable electronic structure. Recently, heterostructured catalysts have exhibited significantly enhanced activities toward HER/OER. The enhancement can be attributed to the increased amount of accessible active sites, accelerated mass/charge transfer, and optimized adsorption of intermediates, which arise from the synergistic effects of the heterostructure. Herein, a comprehensive overview of the recent progress of bifunctional TMP-based heterostructure is introduced to provide an insight into their preparation and corresponding reaction mechanisms. It starts with summarizing general fundamental aspects of HER/OER and the synergistic effect of heterostructures for enhanced catalytic activity. Next, the innovational strategies to design and construct bifunctional TMP-based heterostructures with enhanced overall water splitting activity, as well as the related mechanisms, are discussed in detail. Finally, a summary and perspective for further opportunities and challenges are highlighted for the further development of bifunctional TMP-based heterostructures from the points of practical application and mechanistic studies.

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In situ surface engineering of nickel inverse opal for enhanced overall electrocatalytic water splitting

Abstract: In situsurface engineering of 3D nickel inverse opal was developed to remarkably enhance overall electrocatalytic water splitting performance.

Cited by 31 publications

References 54 publications

In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

Sulfophobic and Vacancy Design Enables Self‐Cleaning Electrodes for Efficient Desulfurization and Concurrent Hydrogen Evolution with Low Energy Consumption

Bifunctional Heterostructured Transition Metal Phosphides for Efficient Electrochemical Water Splitting

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In situ surface engineering of nickel inverse opal for enhanced overall electrocatalytic water splitting

Abstract: In situsurface engineering of 3D nickel inverse opal was developed to remarkably enhance overall electrocatalytic water splitting performance.

Cited by 31 publications

References 54 publications

In Situ Fabrication of Ni2P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

In Situ Fabrication of Ni2P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

Sulfophobic and Vacancy Design Enables Self‐Cleaning Electrodes for Efficient Desulfurization and Concurrent Hydrogen Evolution with Low Energy Consumption

Bifunctional Heterostructured Transition Metal Phosphides for Efficient Electrochemical Water Splitting

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In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries

In Situ Fabrication of Ni₂P Nanoparticles Embedded in Nitrogen and Phosphorus Codoped Carbon Nanofibers as a Superior Anode for Li-Ion Batteries