Electrochemical oxygen evolution reaction efficiently boosted by selective fluoridation of FeNi3 alloy/oxide hybrid

Zha, Meng; Pei, Chengang; Wang, Quan; Hu, Guangzhi; Feng, Ligang

doi:10.1016/j.jechem.2019.12.008

Cited by 115 publications

(48 citation statements)

References 39 publications

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“…Besides, the peaks at higher binding energies at 230.8 eV and 233.9 eV were associated with Mo 5+ 3d 5/2 and 3d 3/2 of MoO x species, which was prone to oxidation on the surface exposed to air [43] . The O 1 s spectrum could be fitted by three peaks relating to Co−O−P, surface O species including hydroxyls and chemisorbed oxygen, and absorbed water [44–45] . The proportion of Co−O−P peak increased from CoP to O,Mo−CoP/NF‐2, indicating the successful O doping (Figure 3c).…”

Section: Resultsmentioning

confidence: 94%

“…The semicircle of O, Mo−CoP/NF‐2 was much smaller than those of CoP/NF, O−CoP/NF, Mo−CoP/NF, O,Mo−CoP/NF‐1 and O,Mo−CoP/NF‐3, indicating the greatly increased conductivity of the O,Mo−CoP/NF‐2, which improved the charge transfer kinetics and contributed to its superior electrochemical HER performance. Turnover frequency (TOF) was calculated to evaluate their intrinsic catalytic efficiency for HER [45] . Much higher TOF value of O,Mo−CoP/NF‐2 was observed than that of CoP/NF, O−CoP/NF, Mo−CoP/NF (Figure S3a).…”

Section: Resultsmentioning

confidence: 99%

“…The result revealed that the enhancement of O,Mo−CoP/NF‐2 for OER was mainly from the contribution of non‐metal O doping. Because the doped non‐metal O element could reduce the thermodynamic and kinetic barrier of the hydroxylation reaction, helpful in the formation of the oxy/hydroxide intermediate owing to the lattice strain in the crystal structure [45,53] . All in all, the superior OER performance of O,Mo−CoP/NF‐2 attributed to its high electrochemical surface area, fast charge transfer kinetics, and efficient intrinsic activity mainly from the O doping.…”

Section: Resultsmentioning

confidence: 99%

“…Turnover frequency (TOF) was calculated to evaluate their intrinsic catalytic efficiency for HER. [45] Much higher TOF value of O,MoÀ CoP/NF-2 was observed than that of CoP/NF, OÀ CoP/NF, MoÀ CoP/NF (Figure S3a). Specifically, the TOF value of O,MoÀ CoP/NF-2 was 0.040 s À 1 at overpotential 150 mV, about 15.4 times, 4.3 times and 4.9 times that of the CoP/NF (0.0026 s À 1 ), OÀ CoP/NF (0.0092 s À 1 ), MoÀ CoP/NF (0.0082 s À 1 ), respectively.…”

Section: Electrocatalytic Hermentioning

confidence: 93%

“…[43] The O 1 s spectrum could be fitted by three peaks relating to CoÀ OÀ P, surface O species including hydroxyls and chemisorbed oxygen, and absorbed water. [44][45] The proportion of CoÀ OÀ P peak increased from CoP to O,MoÀ CoP/NF-2, indicating the successful O doping (Figure 3c). As shown in Co 2p XPS spectra of CoP/NF, the peaks could be divided into Co 2p 3/2 and Co 2p 1/2 regions.…”

Section: Characterization Of Productsmentioning

confidence: 95%

See 4 more Smart Citations

Self‐Supported Oxygen and Molybdenum Dual‐Doped Cobalt Phosphide Hierarchical Nanomaterials as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Zhou

et al. 2020

ChemElectroChem

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Electrocatalytic water splitting is considered an attractive way to achieve clean and sustainable energy production. Herein, a series of self‐supported oxygen and molybdenum dual‐doped cobalt phosphides grown on Ni foam (O,Mo−CoP/NFs) were prepared. The O,Mo−CoP/NFs exhibited 3D hierarchical morphologies including urchin‐like nanostructures assembled with nanorods and nanoflowers assembled with ultrathin nanosheets. The optimized O,Mo−CoP/NFs‐2 nanoflowers exhibited superior electrocatalytic performance for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with an overpotential of only 59 mV at 10 mA cm−2 for HER and 301 mV overpotential at 100 mA cm−2 for OER. Moreover, the O,Mo−CoP/NFs‐2 nanoflowers exhibited efficient overall water splitting as low as 1.66 V for 100 mA cm−2 with outstanding long‐term stability, even superior to the commercial Pt−C/NF and RuO2/NF system. The superior activity of self‐supported O,Mo−CoP/NFs‐2 nanoflowers was attributed to the synergistic effect of O and Mo dual doping, which promoted its intrinsic catalytic activity, and its particular morphology of self‐supported 3D hierarchical nanoflowers, which could expose more catalytic sites and enable facile gas escape. Moreover, the device of overall water splitting can be powered by a single AA battery or a 1.5 V solar cell, showing its great potential for practical applications.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Electrocatalytic Hermentioning

confidence: 93%

Section: Characterization Of Productsmentioning

confidence: 95%

See 3 more Smart Citations

Self‐Supported Oxygen and Molybdenum Dual‐Doped Cobalt Phosphide Hierarchical Nanomaterials as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Zhou

et al. 2020

ChemElectroChem

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Insight Into Intermediate Behaviors and Design Strategies of Platinum Group Metal‐Based Alkaline Hydrogen Oxidation Catalysts

Su,

Wu,

Zhang

et al. 2024

Advanced Materials

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Hydrogen oxidation reaction (HOR) can effectively convert the hydrogen energy through the hydrogen fuel cells, which plays an increasingly important role in the renewable hydrogen cycle. Nevertheless, when the electrolyte pH changes from acid to base, even with platinum group metal (PGM) catalysts, the HOR kinetics declines with several orders of magnitude. More critically, the pivotal role of reaction intermediates and interfacial environment during intermediate behaviors on alkaline HOR remains controversial. Therefore, exploring the exceptional PGM‐based alkaline HOR electrocatalysts and identifying the reaction mechanism are indispensable for promoting the commercial development of hydrogen fuel cells. Consequently, the fundamental understanding of the HOR mechanism is first introduced, with emphases on the adsorption/desorption process of distinct reactive intermediates and the interfacial structure during catalytic process. Subsequently, with the guidance of reaction mechanism, the latest advances in the rational design of advanced PGM‐based (Pt, Pd, Ir, Ru, Rh‐based) alkaline HOR catalysts are discussed, focusing on the correlation between the intermediate behaviors and the electrocatalytic performance. Finally, given that the challenges standing in the development of the alkaline HOR, the prospect for the rational catalysts design and thorough mechanism investigation towards alkaline HOR are emphatically proposed.

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Progress in Manipulating Dynamic Surface Reconstruction via Anion Modulation for Electrocatalytic Water Oxidation

Ajmal

Zhang

et al. 2023

Advanced Science

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The development of efficient and economical electrocatalysts for oxygen evolution reaction (OER) is of paramount importance for the sustainable production of renewable fuels and energy storage systems; however, the sluggish OER kinetics involving multistep four proton‐coupled electron transfer hampers progress in these systems. Fortunately, surface reconstruction offers promising potential to improve OER catalyst design. Anion modulation plays a crucial role in controlling the extent of surface reconstruction and positively persuading the reconstructed species' performances. This review starts by providing a general explanation of how various types of anions can trigger dynamic surface reconstruction and create different combinations with pre‐catalysts. Next, the influences of anion modulation on manipulating the surface dynamic reconstruction process are discussed based on the in situ advanced characterization techniques. Furthermore, various effects of survived anionic groups in reconstructed species on water oxidation activity are further discussed. Finally, the challenges and prospects for the future development directions of anion modulation for redirecting dynamic surface reconstruction to construct highly efficient and practical catalysts for water oxidation are proposed.

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Electrochemical oxygen evolution reaction efficiently boosted by selective fluoridation of FeNi3 alloy/oxide hybrid

Cited by 115 publications

References 39 publications

Self‐Supported Oxygen and Molybdenum Dual‐Doped Cobalt Phosphide Hierarchical Nanomaterials as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Self‐Supported Oxygen and Molybdenum Dual‐Doped Cobalt Phosphide Hierarchical Nanomaterials as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Insight Into Intermediate Behaviors and Design Strategies of Platinum Group Metal‐Based Alkaline Hydrogen Oxidation Catalysts

Progress in Manipulating Dynamic Surface Reconstruction via Anion Modulation for Electrocatalytic Water Oxidation

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