Enhanced electrocatalytic activity of water oxidation in an alkaline medium <i>via</i> Fe doping in CoS<sub>2</sub> nanosheets

Kong, Weisu; Luan, Xiaoqian; Du, Huitong; Xia, Lian; Qu, Fengli

doi:10.1039/c8cc10203a

Cited by 64 publications

(32 citation statements)

References 48 publications

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“…The two peaks located at 778.5 eV and 793.3 eV are separately assigned to the binding energies of 2p 3/2 and 2p 1/2 of Co−P species (Figure b), which is consistent with the reported results . Similarly, for the Fe 2p region of CoFeP@Ru (Figure c), the peaks related to the Fe 2P 3/2 and Fe 2p 1/2 are centered at 709.9 and 724.4 eV, respectively, confirming the formation of Fe−P bond. The binding energies of 711.6 eV can correspond to oxidized Fe from superficial oxidation of CoFeP@Ru.…”

Section: Resultssupporting

confidence: 89%

“…Figure a is the XPS survey spectrum of the composite, revealing that CoFeP@Ru consists of Co, Fe, Ru, and P elements, with atomic percentages of 2.3 : 1 : 1.5 for Ru : Fe : Co. The two peaks located at 778.5 eV and 793.3 eV are separately assigned to the binding energies of 2p 3/2 and 2p 1/2 of Co−P species (Figure b), which is consistent with the reported results . Similarly, for the Fe 2p region of CoFeP@Ru (Figure c), the peaks related to the Fe 2P 3/2 and Fe 2p 1/2 are centered at 709.9 and 724.4 eV, respectively, confirming the formation of Fe−P bond.…”

Section: Resultssupporting

confidence: 88%

“…Hitherto, transition metal phosphides (TMPs), such as Fe-, [5,6] Co-, [3,7,8] and Ni-based phosphides, [9,10] are potentially promising catalysts in electrocatalysis owing to the abundant and dispersive active centers, rich chemical states, and suitable delectron configuration. Recently, construction of metal-transition metal phosphides (M/TMPs) interface materials has become significant and attractive.…”

Section: Introductionmentioning

confidence: 99%

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Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Liu

et al. 2020

ChemCatChem

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Interfacial engineering and defect modulation can provide abundant active sites for catalysts to further boost the catalysis process. In this work, we develop a strategy to grow multiheterogeneous cobalt phosphide (CoP) nanorods with rich interfaces and defects along the one-dimensional (1D) nanostructure by dual incorporation of Fe and Ru (CoFeP@Ru). Such a catalyst exhibits high activity and stability towards the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with overpotentials of only 38 mV in 0.5 M H 2 SO 4 and 48 mV in 1.0 M KOH for HER, and an overpotential of 340 mV in 0.1 M KOH for OER at 10 mA cm À 2. Finally, as the bifunctional catalyst, an alkali electrolyzer is assembled and delivers at a low cell voltage, with almost 100 % Faradaic efficiency. Our experimental results demonstrate that Fe incorporation can disturb or even break the periodic structure of cobalt phosphides, causing a redistribution of the electronic structure and electron density of activity sites, while Ru can significantly enhance the catalytic kinetics, as well as electrochemical and mechanical stability.

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Liu

et al. 2020

ChemCatChem

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“…To date, most of the investigations on the Fe‐doped non‐noble metal‐based catalysts focused on the substitution of Fe to the substrate metal atoms, such as Co and Ni, which have similar electronic structures and atomic radii. [ 34 ] The doping of Fe is usually realized by adding a desired amount of iron salt as precursor during the synthesis. In general, the enhanced catalytic performances with the Fe doping can be attributed to the two major mechanisms: i) altering the local electron structure and thus the hydrogen adsorption free energy (Δ G H* ) and ii) improving the electrical conductivity of the catalysts.…”

Section: Metallic Heteroatom Doped Non‐noble Metal‐based Electrocatalmentioning

confidence: 99%

Heteroatom‐Doping of Non‐Noble Metal‐Based Catalysts for Electrocatalytic Hydrogen Evolution: An Electronic Structure Tuning Strategy

et al. 2021

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Electrocatalytic water splitting for hydrogen production is an appealing way to reduce carbon emissions and generate renewable fuels. This promising process, however, is limited by its sluggish reaction kinetics and high‐cost catalysts. Construction of low‐cost and high‐performance non‐noble metal‐based catalysts have been one of the most effective approaches to address these grand challenges. Notably, the electronic structure tuning strategy, which could subtly tailor the electronic states, band structures, and adsorption ability of the catalysts, has become a pivotal way to further enhance the electrochemical water splitting reactions based on non‐noble metal‐based catalysts. Particularly, heteroatom‐doping plays an effective role in regulating the electronic structure and optimizing the intrinsic activity of the catalysts. Nevertheless, the reaction kinetics, and in particular, the functional mechanisms of the hetero‐dopants in catalysts yet remains ambiguous. Herein, the recent progress is comprehensively reviewed in heteroatom doped non‐noble metal‐based electrocatalysts for hydrogen evolution reaction, particularly focus on the electronic tuning effect of hetero‐dopants in the catalysts and the corresponding synthetic pathway, catalytic performance, and activity origin. This review also attempts to establish an intrinsic correlation between the localized electronic structures and the catalytic properties, so as to provide a good reference for developing advanced low‐cost catalysts.

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“…In the S 2p spectrum for Y‐CoMoO x S y , the peaks at the binding energies of 163.2 and 168.5 eV corresponded to the OS bond and S 2− , respectively. [ 54 ] In H‐CoMoO x S y , the peak of OS became weakened and almost disappeared, while the S 2− peak can be deconvoluted into two peaks at 161.7 and 162.8 eV, which can be assigned to S 2p 3/2 and S 2p 1/2 , respectively. [ 55 ] As a result, XPS analysis further confirmed the gradual conversion from oxides to sulfides and the eventual formation of CoMoO x S y hybrid.…”

Section: Resultsmentioning

confidence: 99%

Synergizing Phase and Cavity in CoMoO_xS_y Yolk–Shell Anodes to Co‐Enhance Capacity and Rate Capability in Sodium Storage

Wang

Zhu

et al. 2020

Small

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Sodium‐ion batteries (SIBs) have been recognized as the promising alternatives to lithium‐ion batteries for large‐scale applications owing to their abundant sodium resource. Currently, one significant challenge for SIBs is to explore feasible anodes with high specific capacity and reversible pulverization‐free Na+ insertion/extraction. Herein, a facile co‐engineering on polymorph phases and cavity structures is developed based on CoMo‐glycerate by scalable solvothermal sulfidation. The optimized strategy enables the construction of CoMoOxSy with synergized partially sulfidized amorphous phase and yolk–shell confined cavity. When developed as anodes for SIBs, such CoMoOxSy electrodes deliver a high reversible capacity of 479.4 mA h g−1 at 200 mA g−1 after 100 cycles and a high rate capacity of 435.2 mA h g−1 even at 2000 mA g−1, demonstrating superior capacity and rate capability. These are attributed to the unique dual merits of the anodes, that is, the elastic bountiful reaction pathways favored by the sulfidation‐induced amorphous phase and the sodiation/desodiation accommodatable space benefits from the yolk–shell cavity. Such yolk–shell nano‐battery materials are merited with co‐tunable phases and structures, facile scalable fabrication, and excellent capacity and rate capability in sodium storage. This provides an opportunity to develop advanced practical electrochemical sodium storage in the future.

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Enhanced electrocatalytic activity of water oxidation in an alkaline medium via Fe doping in CoS₂ nanosheets

Abstract: Fe–CoS2/CC exhibits enhanced catalytic OER performance, needing an overpotential of 302 mV at 10 mA cm−2 in 1.0 M KOH.

Cited by 64 publications

References 48 publications

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Heteroatom‐Doping of Non‐Noble Metal‐Based Catalysts for Electrocatalytic Hydrogen Evolution: An Electronic Structure Tuning Strategy

Synergizing Phase and Cavity in CoMoO_xS_y Yolk–Shell Anodes to Co‐Enhance Capacity and Rate Capability in Sodium Storage

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Enhanced electrocatalytic activity of water oxidation in an alkaline medium via Fe doping in CoS2 nanosheets

Abstract: Fe–CoS2/CC exhibits enhanced catalytic OER performance, needing an overpotential of 302 mV at 10 mA cm−2 in 1.0 M KOH.

Cited by 64 publications

References 48 publications

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Heteroatom‐Doping of Non‐Noble Metal‐Based Catalysts for Electrocatalytic Hydrogen Evolution: An Electronic Structure Tuning Strategy

Synergizing Phase and Cavity in CoMoOxSy Yolk–Shell Anodes to Co‐Enhance Capacity and Rate Capability in Sodium Storage

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Enhanced electrocatalytic activity of water oxidation in an alkaline medium via Fe doping in CoS₂ nanosheets

Synergizing Phase and Cavity in CoMoO_xS_y Yolk–Shell Anodes to Co‐Enhance Capacity and Rate Capability in Sodium Storage