Self-template synthesis of hollow Fe-doped CoP prisms with enhanced oxygen evolution reaction activity

Ding, Xueda; Huang, Hai; Wan, Qiang; Guan, Xu; Fang, Yuanxing; Lin, Sen; Chen, Dongyang; Xie, Zailai

doi:10.1016/j.jechem.2021.04.001

Cited by 77 publications

(32 citation statements)

References 67 publications

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“…However, one of the limitations in the current reported studies is that it has not been thoroughly studied on the influence of CoP incoporation of CQDs. For example, Ding et al 44 developed a self-template strategy to synthesize hollow Fe-doped CoP prisms (Fe−CoP). The obtained Fe−CoP formed a rich mesoporous channel and exhibited a remarkable OER performance, with a low overpotential of 236 mV to deliver a current density of 10 mA cm −2 and a low Tafel slope of 32.9 mV dec −1 .…”

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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“…From Tafel plot (Figure 3c), as mall slope, 35.1 mV dec À1 of Ir/CoNiB is lower than those of CoB (85.4 mV dec À1 ), CoNiB (75.3 mV dec À1 )a nd the reported catalysts (Figure S17 and Table S2), [39][40][41][42][43][44][45] suggesting favorable OER kinetics in alkaline electrolyte.T he turnover frequency (TOF) represents the intrinsic activity of Ir/CoNiB (Figure 3d), achieving the highest TOFv alue of 0.37 s À1 at the overpotential of 300 mV in comparison of the reported catalysts (Table S3). [46][47][48][49][50][51][52][53][54][55] Thec harge transfer resistance (R ct ) by electrochemical impedance spectra is closely related to OER performance.From Nyquist plots (Figure 3e), the R ct of Ir/CoNiB is the smallest among all materials,d emonstrating the best conductivity and fast interface Faradaic reaction process after the introduction of Ir clusters.T he electrochemically effective surface area (ECSA) is used to manifest the origin of the drastic improvement of OER activity by the calculation of electrochemical double-layer capacitances (C dl ) of different materials (Figure S18). The C dl value of Ir/CoNiB is 27.4 mF cm À2 (Figure S19), higher than those of CoB (3.2 mF cm À2 )a nd CoNiB (6.8 mF cm À2 ).…”

Section: Methodsmentioning

confidence: 99%

Engineering Lattice Oxygen Activation of Iridium Clusters Stabilized on Amorphous Bimetal Borides Array for Oxygen Evolution Reaction

et al. 2021

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Developing robust oxygen evolution reaction (OER) catalysts requires significant advances in material design and in-depth understanding for water electrolysis. Herein, we report iridium clusters stabilized surface reconstructed oxyhydroxides on amorphous metal borides array, achieving an ultralow overpotential of 178 mV at 10 mA cm À2 for OER in alkaline medium. The coupling of iridium clusters induced the formation of high valence cobalt species and Ir-O-Co bridge between iridium and oxyhydroxides at the atomic scale,engineering lattice oxygen activation and non-concerted proton-electron transfer to trigger multiple active sites for intrinsic pH-dependent OER activity.T he lattice oxygen oxidation mechanism (LOM) was confirmed by in situ 18 O isotope labeling mass spectrometry and chemical recognition of negative peroxo-like species.Theoretical simulations reveal that the OER performance on this catalyst is intrinsically dominated by LOM pathway,facilitating the reaction kinetics. This work not only paves an avenue for the rational design of electrocatalysts,b ut also serves the fundamental insights into the lattice oxygen participation for promising OER application.

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“…Doping is an effective way to manufacture novel active sites in the catalyst to increase the intrinsic activity. − The doping strategy, which can be classified into metal and nonmetal doping, is effective in the electronic structure modification with a minimal destroying effect on the crystal structure; meanwhile, the adsorption energy, as well as the electrocatalytic performance, can be improved. − Metal doping was reported effective in the formation of oxygen vacancies, and the doped metal can increase the conductivity and generate new active centers by synergistic promotion of the catalytic performance with the bulk phase. , In addition, the doped metal as metal cations can regulate the electronic structure of the active phase or directly catalyze the reaction as the active site . The nonmetal doping can also effectively improve the intrinsic activity of the catalyst by optimizing the adsorption energy of the intermediate products, generating vacancies .…”

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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Self-template synthesis of hollow Fe-doped CoP prisms with enhanced oxygen evolution reaction activity

Cited by 77 publications

References 67 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

Engineering Lattice Oxygen Activation of Iridium Clusters Stabilized on Amorphous Bimetal Borides Array for Oxygen Evolution Reaction

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

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