Defect-Rich Fe-Doped CoP Nanosheets as Efficient Oxygen Evolution Electrocatalysts

Chen, Tianyun; Qin, Shan; Qian, Min; Dai, Haojiang; Fu, Yingyan; Zhang, Yaqi; Ye, Bo; Lin, Qinhan; Yang, Qinghua

doi:10.1021/acs.energyfuels.1c01301

Cited by 20 publications

(22 citation statements)

References 59 publications

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“…Cobalt phosphide (CoP) is an excellent catalyst, which as an integral part of TMPs, can be used to improve the defects of Ru-and Ir-based electrocatalysts. To illustrate, Chen et al 22 obtained Fe-doped CoP NSs with 312 mV overpotential for OER. Jiang et al 23 obtained a Co x Mo y @NC composite material with excellent properties for both OER and HER.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nitrogen-Doped Carbon Quantum Dots on the Electrocatalytic Performance of the CoP Nanoflower Catalyst for OER

Wang

Bai

et al. 2022

Langmuir

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Cobalt phosphides modified by nitrogen-doped carbon quantum dots (CoP−NCQDs) were successfully constructed by a facile and low-cost hydrothermal treatment, which is expected to replace traditional noble-metal oxygen evolution reaction electrode materials. Detailed experiments and findings show that nitrogen-doped carbon quantum dots (NCQDs) have a significant impact on the morphology of the CoP catalyst, and nitrogen doping can regulate the surface-active sites to obtain the catalyst with abundant structural defects. Simultaneously, nitrogen doping can regulate the content of pyridinic N and pyrrolic N, which exerts positive effects on the formation of the bond structure and electron conduction between NCQDs and CoP.

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Section: Introductionmentioning

confidence: 99%

Influence of Nitrogen-Doped Carbon Quantum Dots on the Electrocatalytic Performance of the CoP Nanoflower Catalyst for OER

Wang

Bai

et al. 2022

Langmuir

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“…The surface engineering by etching, cation or anion substituting, and heteroatom doping for transition-metal sulfide can effectively improve their activity, , and the enhanced catalytic activities were attributed to the synergistic defects or vacancy sites on the surfaces. − Thus, the introduction of defects and vacancies to the catalyst surface is considered to be one of the most effective surface decoration strategies to generate more active sites and promote the charge transfer ability. , Therefore, the electrocatalytic activity is boosted, because of not only the increased active surface area but also the optimized adsorption capacity of the reaction intermediates. , In addition, the defect can also increase the hydrophilicity of the surface to effectively contact the electrolyte . The vacancy is formed by the loss of one or several atoms in the crystal lattice of a metal compound without phase modification, which will cause the electronic structure change of the nearby metal atoms; the defect and vacancy formed in the catalyst system, which, thereby, will impact the adsorption of intermediates during the OER process, and the performance can be boosted as expected. − …”

Section: Metal Sulfide Structure Regulationmentioning

confidence: 99%

Recent Progress in Transition-Metal Sulfide Catalyst Regulation for Improved Oxygen Evolution Reaction

Huang

Feng

2022

Energy Fuels

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Electrochemical hydrogen production is considered the most reliable approach to transfer the renewable energies to the chemical energynamely, the hydrogenfor storage, and intensive attention has been directed to the nonprecious catalyst development for water splitting reactions. Among the catalyst candidates, metal sulfides have been extensively explored as an emerging electrocatalyst material for oxygen evolution reaction (OER) in water splitting reaction, because of their abundant active centers, good electrical conductivity, and high intrinsic activity. By optimizing the structure and chemical states, some advanced catalysts have been reported recently, which was instructive and inspiring for novel catalyst development. Herein, the recent advances in electrocatalytic performance and optimization strategies of transition-metal sulfide for OER are reviewed systematically and comprehensively. The fundamental catalytic mechanism and key parameters of OER are first presented and then followed by the physicochemical properties of metal sulfides, which could be helpful in understanding the correlation between the structure and catalytic performance. Importantly, the intrinsic activity of metal sulfides boosted by the general strategies, in terms of the defect/vacancy effect, lattice mismatch, phase engineering, heterostructure, and the doping effect, is mainly discussed in this work. The challenges and opportunities related to the further development of metal sulfide materials with high activity and long-term durability are finally proposed. It can be concluded that these regulatory strategies could largely improve the electrocatalytic performance by increasing the active site exposure and reducing the energy barrier of catalytic reactions. In addition, the problems and future challenges in improving the catalytic performance of metal sulfide materials are presented, which provides beneficial enlightenment and guidance for the development of efficient and low-cost electrocatalysts in the future. Hopefully, this effort would be helpful to the design and preparation of metal sulfides catalyst for OER.

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“…The defects other than point defects, including line defects (e.g., edge dislocation , and screw dislocation), planar defects (e.g., twin boundaries, grain boundaries, and stacking faults), and bulk defects (e.g., pores , ), could also exert a positive effect on the catalytic performance of electrocatalysts for water splitting. For instance, the bulk defects can result in increased porosity, thus exposing more active sites.…”

Section: Defect Engineering Of Electrocatalysts For Water Splittingmentioning

confidence: 99%

Unraveling the Role of Defects in Electrocatalysts for Water Splitting: Recent Advances and Perspectives

et al. 2022

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The development of highly efficient and robust electrocatalysts plays a crucial role in the success of sustainable energy conversion technologies, like electrochemical water splitting for hydrogen production. Defect engineering has been considered as an effective strategy to tune the electrocatalysts and enhance the activity. This review covers recent advances in engineering, probing, and understanding the defects in electrocatalysts toward the hydrogen evolution reaction and oxygen evolution reaction. In particular, the role of defects in electrocatalysts have been comprehensively discussed and summarized on the basis of both experimental results and theoretical calculations. We further provide a summary of the computational insight into the role of defects. Finally, we propose the critical challenges and corresponding future directions.

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Defect-Rich Fe-Doped CoP Nanosheets as Efficient Oxygen Evolution Electrocatalysts

Cited by 20 publications

References 59 publications

Influence of Nitrogen-Doped Carbon Quantum Dots on the Electrocatalytic Performance of the CoP Nanoflower Catalyst for OER

Influence of Nitrogen-Doped Carbon Quantum Dots on the Electrocatalytic Performance of the CoP Nanoflower Catalyst for OER

Recent Progress in Transition-Metal Sulfide Catalyst Regulation for Improved Oxygen Evolution Reaction

Unraveling the Role of Defects in Electrocatalysts for Water Splitting: Recent Advances and Perspectives

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