Constructing inter-diffusive PtCuNi/WO3 interface to enhance the catalytic activity and stability in oxygen reduction

Xu, Haozhe; Li, D.; Chen, Ying; Fang, Pin; Ke, Xiaoxing; Demidenko, Olga; Li, Yujing

doi:10.1007/s42864-023-00226-0

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…The prerequisite for the practical application of this type of catalyst is to stably scatter metal atoms on supports that can strongly interact with the metal atoms to prevent their possible aggregation. 2D materials like graphene, boron nitrides, and transition metal dichalcogenides with unique physiochemical properties were widely investigated as substrates for metal atoms. − However, metal atoms tend to diffuse and agglomerate on these substrates . Introducing vacancies and holes can solve this issue, but precisely carving and holding vacancies and holes are extremely difficult in large-scale applications .…”

Section: Introductionmentioning

confidence: 99%

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Zheng,

2024

ACS Appl. Nano Mater.

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Developing efficient nanosized electrocatalysts is crucial for driving the urea oxidation reaction (UOR) and conversion. Atomically dispersed metal atoms in two-dimensional materials have shown promising performance in various electrocatalytic reactions. However, the potential for UOR and the effect of anchoring type on their activity have not been fully explored. Herein, we designed two types of Ni atom-anchoring C2N electrocatalysts: doping (Ni–C2N) and adsorbing (Ni/C2N), and compared their UOR activities by density functional theory calculations. The investigation of the structural and electronic properties revealed the origin of the activity difference of both models. Consequently, Ni/C2N doped with Ni–N coordination bonds exhibited higher catalytic activity than that of the adsorbing sample due to its higher conductivity, favorable Ni–N coordination structure, and charge transfer with N–H-containing intermediates, hence enhancing the adsorption and dehydrogenation of key intermediates. Moreover, we demonstrated that the UOR activity can be further improved by introducing a second Ni atom to a hole in C2N. This study offers a valuable theoretical understanding of the design of atomically dispersed catalysts for efficient UOR.

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Section: Introductionmentioning

confidence: 99%

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Zheng,

2024

ACS Appl. Nano Mater.

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“…By far, platinum-group-metal (PGM)-based catalysts are considered the most effective ORR catalysts to date. Unfortunately, the widespread applications and large-scale commercialization of these devices are still hampered by the limited reserves of Pt resources. − Hence, developing a new alternative with less resource scarcity but competitive performance is of great significance. Recently, palladium (Pd), with its relatively abundant global reserves and catalytic performance comparable to that of Pt, has received extensive attention. − Nevertheless, the O adsorption over Pd is still too strong for realizing optimized ORR performance .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Oxygen Reduction Activity via Tailoring Microstrain in PdMo Nanoalloy through Repetitive Hydrogen Absorption–Release

Chen,

Sun,

et al. 2024

ACS Catal.

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The catalytic activities of noble-metal electrocatalysts are heavily correlated to their defective surface structures. However, controllably constructing surface defects on noble-metal nanocrystals remains a great challenge. In this work, an electrochemical method is developed to tailor the surface structure of the PdMo nanoalloy electrocatalyst, involving H absorption followed by its subsequent release near the surface of Pd. The optimized PdMo nanoalloy electrocatalyst exhibits an oxygen reduction reaction (ORR) half-wave potential (E 1/2 ) of 0.929 V (vs reversible hydrogen electrode, RHE) with a specific activity (SA) as high as 5.09 mA/cm 2 at 0.9 V (vs RHE) in an alkaline electrolyte, ∼10.6 times that of the state-of-the-art Pt/C electrocatalyst. Density functional theory calculations together with ex situ and in situ electrochemical and structural characterizations unravel that the microstrain generated at the PdMo nanoalloy surface by electrochemically induced H absorption−release can downshift the d-band center of Pd (the ORR active site) in PdMo to decrease oxygen binding and promote *OOH to *O transformation as well as *OH desorption for fast ORR. This work provides a surface defect engineering strategy to develop highperformance noble-metal electrocatalysts for energy applications.

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“…[1][2] Therefore, the production and use of environmentally friendly and sustainable energy is an urgent need to solve the above problems. [3][4][5] Among all kinds of renewable energy sources, solar energy has attracted great attention for its inexhaustible characteristics. [6][7] Photocatalytic technology can effectively convert and utilize solar energy, which is regarded as an important solution to the problem of overuse related to fossil fuels.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications

Yan,

Wu,

et al. 2024

ChemSusChem

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Photocatalysis has the advantages of practical, sustainable and environmental protection, so it plays a significant role in energy transformation and environmental utilization. CeO2 has attracted widespread attention for its unique 4f electrons, rich defect structures, high oxygen storage capacity and great chemical stability. In this paper, we review the structure of CeO2 and the common methods for the preparation of CeO2‐based composites in the first part. In particular, we highlight the co‐precipitation method, template method, and sol‐gel method methods. Then, in the second part, we introduce the application of CeO2‐based composites in photocatalysis, including photocatalytic CO2 reduction, hydrogen production, degradation, selective reaction, and photocatalytic nitrogen fixation. In addition, we discuss several modification techniques to improve the photocatalytic performance of CeO2‐based composites, such as elemental doping, defect engineering, constructing heterojunction and morphology regulation. Finally, the challenges faced by CeO2‐based composites are analyzed and their development prospects are prospected. This review provides a systematic summary of the recent advance of CeO2‐based composites in the field of photocatalysis, which can provide useful references for the rational design of efficient CeO2‐based composite photocatalysts for sustainable development.

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Constructing inter-diffusive PtCuNi/WO3 interface to enhance the catalytic activity and stability in oxygen reduction

Cited by 8 publications

References 40 publications

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Enhancing Oxygen Reduction Activity via Tailoring Microstrain in PdMo Nanoalloy through Repetitive Hydrogen Absorption–Release

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications

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Constructing inter-diffusive PtCuNi/WO3 interface to enhance the catalytic activity and stability in oxygen reduction

Cited by 8 publications

References 40 publications

Theoretical Exploration of Anchoring Type Effects of C2N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Theoretical Exploration of Anchoring Type Effects of C2N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Enhancing Oxygen Reduction Activity via Tailoring Microstrain in PdMo Nanoalloy through Repetitive Hydrogen Absorption–Release

Recent Advances of CeO2‐Based Composite Materials for Photocatalytic Applications

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About

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Theoretical Exploration of Anchoring Type Effects of C₂N Nanosheet-Supported Nickel Atoms for Urea Electrooxidation

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications