CdS nanocages@defective-CoNi-LDH with bilayer porous hollow frameworks toward optimized sono-photocatalytic performance

Fang, Bin; Xing, Zipeng; Du, Fuxin; Kong, Weifeng; Li, Zhenzi; Zhou, Wei

doi:10.1039/d2ta03783a

Cited by 23 publications

(8 citation statements)

References 48 publications

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“…The large surface area and ideal mesoporous structure of Ni@NiOCN-4 can promote the exposure of active sites, diffusion of intermediates, and the release of gas produced in the UOR process. 38 EPR spectrum of Ni-NiO@CN-4 showed a very broad signal originating from the high intrinsic defects and paramagnetic metal centers (Figure S8). A strong EPR signal with a g value of 2.17 corresponds to more defect formation and a mixed valence state of Ni ion (Ni 2+ /Ni 3+ ) in the Ni@ NiOCN-4 nanocomposite.…”

Section: Resultsmentioning

confidence: 99%

“…The sample annealed at 400 °C demonstrated the highest electrocatalytic activity and stability for UOR. The large surface area and ideal mesoporous structure of Ni@NiOCN-4 can promote the exposure of active sites, diffusion of intermediates, and the release of gas produced in the UOR process . EPR spectrum of Ni-NiO@CN-4 showed a very broad signal originating from the high intrinsic defects and paramagnetic metal centers (Figure S8).…”

Section: Resultsmentioning

confidence: 99%

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Highly Dispersed Core–Shell Ni@NiO Nanoparticles Embedded on Carbon–Nitrogen Nanotubes as Efficient Electrocatalysts for Enhancing Urea Oxidation Reaction

et al. 2023

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Wastewater treatment and energy production are important fields of research to meet the current requirements of sustainable energy development and wastewater restoration. The urea oxidation reaction (UOR) can be used for simultaneous environmental remediation and energy production on a priority basis. Nickel−nickel oxide (Ni@NiO) core−shell NPs on carbon−nitrogen nanotubes (CNNTBs) have been synthesized as electrocatalysts by using a simple and easy aerial annealing method. Morphological analysis by high resolutiontransmission electron microscopy (HR-TEM) confirms the formation of Ni@NiO NPs on CNNTBs with an average size of ∼40 nm. Powder X-ray diffraction (XRD) confirms Ni@ NiOCN-X with a face-centered cubic (FCC) crystal structure. A BET surface area measurement suggests that annealing at 400 °C (Ni@NiOCN-4) creates a larger surface area than that of carbon−nitrogen material (CN). The electrochemical studies of the Ni@ NiOCN-4 nanocomposite reveal that it has a better electrochemical activity and ultralow onset potential with an E onset = 0.42 V Ag/AgCl and current density of 34 mA/cm 2 for a potential of 0.71 V Ag/AgCl toward urea oxidation reactions. The annealing temperature-dependent studies were found to be effective toward the morphology tunning and hence tunable catalytic performance toward urea oxidation reactions. In urea oxidation studies, chronoamperometry (i−t) and EIS analysis show that the proposed Ni@NiOCN-4 system has long-term stability and ultrafast electron transfer. This work showed a simple way for temperature-dependent morphology tuning of a catalyst with enhanced electrochemical activity for urea oxidation, which is useful for sustainable energy production utilizing urea-rich wastewater.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Highly Dispersed Core–Shell Ni@NiO Nanoparticles Embedded on Carbon–Nitrogen Nanotubes as Efficient Electrocatalysts for Enhancing Urea Oxidation Reaction

et al. 2023

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“…As the electrons and holes migrate to the surface, recombination may occur in bulk, and only a portion of the pairs that reach the redox-active sites are used in oxygen and hydrogen evolution reactions. [60,61] To reduce charge recombination, various approaches can be employed, such as creating hetero/homojunctions, [100][101][102][103][104][105] using cocatalysts for OER and HER, [51,106,107] using sound fields in photocatalytic reactions (sonophotocatalysis) [108,109] and doping the semiconductor with metals or nonmetals. [110][111][112] The various charge-separation mechanisms are discussed later.…”

Section: Separation Of Charge Carriersmentioning

confidence: 99%

Strategies to Enhance Interfacial Spatial Charge Separation for High‐Efficiency Photocatalytic Overall Water‐Splitting: A Review

Odabasi Lee,

Lakhera,

Yong

2023

Adv Energy and Sustain Res

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Developing efficient photocatalysts for overall water‐splitting (OWS) has garnered considerable attention due to their potential in renewable energy conversion and storage. Enhancing the efficiency of interfacial spatial charge separation poses a key challenge in this field, as it plays a momentous role in the photocatalytic process. In this review article, a range of strategies aimed at improving interfacial spatial charge separation in photocatalysts for realizing high‐efficiency OWS are explored. To provide a comprehensive understanding, first the fundamentals of photocatalytic water‐splitting are introduced and the main bottlenecks in the reaction process, along with various charge separation and transfer mechanisms are identified. Subsequently, recent advancements and efforts in designing spatial charge separation at the interfaces of 0D, 1D, 2D, and 3D nanostructured photocatalysts are discussed. Finally, a summary is presented and a long‐term outlook for spatial charge separation in the field of OWS is offered. By consolidating the current state‐of‐the‐art research, this review highlights the key challenges and favorable circumstances for future advancements in the pursuit of efficient OWS.

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“…There are two kinds of acoustic waves: bulk acoustic waves (RO) and surface acoustic waves (SAW), which both have been demonstrated to activate electrocatalysts and alter reaction selectivity. [61][62][63][64] Altering the work function of the metal surface can also significantly impact its electronic properties. Applying voltage to interdigitated transducers (IDT) on the surface of ferroelectric crystals can generate SAW.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound‐Assisted Preparation and Performance Regulation of Electrocatalytic Materials

Deng,

Chen,

et al. 2024

ChemPlusChem

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With the advancement of scientific research, the introduction of external physical methods not only adds extra freedom to the design of electro‐catalytical processes for green technologies but also effectively improves the reactivity of materials. Physical methods can adjust the intrinsic activity of materials and modulate the local environment at the solid‐liquid interface. In particular, this approach holds great promise in the field of electrocatalysis. Among them, the ultrasonic waves have shown reasonable control over the preparation of materials and the electrocatalytic process. However, the research on coupling ultrasonic waves and electrocatalysis is still early. The understanding of their mechanisms needs to be more comprehensive and deep enough. Firstly, this article extensively discusses the adhibition of the ultrasonic‐assisted preparation of metal‐based catalysts and their catalytic performance as electrocatalysts. The obtained metal‐based catalysts exhibit improved electrocatalytic performances due to their high surface area and more exposed active sites. Additionally, this article also points out some urgent unresolved issues in the synthesis of materials using ultrasonic waves and the regulation of electrocatalytic performance. Lastly, the challenges and opportunities in this field are discussed, providing new insights for improving the catalytic performance of transition metal‐based electrocatalysts.

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CdS nanocages@defective-CoNi-LDH with bilayer porous hollow frameworks toward optimized sono-photocatalytic performance

Abstract: HCNs@HD-CoNi-LDH are fabricated via Cd-based Prussian blue analog nanocubes twice sulfidation and epitaxial growth ZIF-67 etching into hollow defective CoNi-LDH strategies, which exhibit excellent sono-photocatalytic performance due to special bilayer porous hollow frameworks.

Cited by 23 publications

References 48 publications

Highly Dispersed Core–Shell Ni@NiO Nanoparticles Embedded on Carbon–Nitrogen Nanotubes as Efficient Electrocatalysts for Enhancing Urea Oxidation Reaction

Highly Dispersed Core–Shell Ni@NiO Nanoparticles Embedded on Carbon–Nitrogen Nanotubes as Efficient Electrocatalysts for Enhancing Urea Oxidation Reaction

Strategies to Enhance Interfacial Spatial Charge Separation for High‐Efficiency Photocatalytic Overall Water‐Splitting: A Review

Ultrasound‐Assisted Preparation and Performance Regulation of Electrocatalytic Materials

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