Iron oxide embedded titania nanowires – An active and stable electrocatalyst for oxygen evolution in acidic media

Zhao, Lili; Cao, Qing; Wang, Aili; Duan, Jiazhi; Zhou, Weijia; Sang, Yuanhua; Liu, Hong

doi:10.1016/j.nanoen.2017.12.029

Cited by 108 publications

(55 citation statements)

References 40 publications

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“…The high‐resolution XPS spectrum of Fe 2p (Figure c) is deconvolved into a spin‐obit doublet at 707.2 and 720.4 eV, which can be assigned to the binding energies for Fe species in Fe–CoP . The broad peak centered at 712.9 eV is attributed to the Fe oxidation state resulting from the surface oxidation, which is consistent with previous work, with a satellite peak located at about 718.2 eV . The P 2p core level spectrum (Figure d) reveals three main peaks at 129.3, 130.1, and 133.7 eV.…”

Section: Resultssupporting

confidence: 87%

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

Ning

Zhao

et al. 2018

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115

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Hollow nanostructures with mesoporous shells are attractive for their advantageous structure-dependent high-efficiency electrochemical catalytic performances. In this work, a novel nanostructure of Fe-doped CoP hollow triangle plate arrays (Fe-CoP HTPAs) with unique mesoporous shells is designed and synthesized through a room-temperature postsynthetic ligand exchange reaction followed by a facile phosphorization treatment. The mild postsynthetic ligand exchange reaction of the presynthesized ZIF-67 TPAs with K [Fe(CN) ] in an aqueous solution at room temperature is of critical importance in achieving the final hollow nanostructure, which results in the production of CoFe(II)-PBA HTPAs that not only determine the formation of the interior voids in the nanostructure, but also provide the doping of Fe atoms to the CoP lattice. As expected, the as-prepared mesoporous Fe-CoP HTPAs exhibit pronounced activity for water splitting owing to the advantages of abundant active reaction sites, short electron and ion pathways, and favorable hydrogen adsorption free energy (ΔG ). For the hydrogen and oxygen evolution reactions with the Fe-CoP HTPAs in alkaline medium, the low overpotentials of 98 and 230 mV are observed, respectively, and the required cell voltage toward overall water splitting is only as low as 1.59 V for the driving current density of 10 mA cm .

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Section: Resultssupporting

confidence: 87%

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

Ning

Zhao

et al. 2018

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258

115

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“…Specifically, the peaks at 712.5 and 725.5 eV were assigned to high valence state Fe 3+ . Meanwhile, the peaks of low valence state Fe 2+ were deconvoluted at 710 and 723.1 eV . The satellite peak located at 718.7 eV was characteristic peaks of Fe 3+ .…”

Section: Resultsmentioning

confidence: 99%

Orienting Active Crystal Planes of New Class Lacunaris Fe₂PO₅ Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media

Meng

Hou

et al. 2018

Adv Funct Materials

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Developing efficient and stable oxygen evolution reaction (OER) electrocatalysts is essential for realizing sustainable energy conversion, such as solar fuels. Although modulating active sites and electron transfer is of great significance to boost electrocatalysis activity, it still remains a big challenge to desirably actualize this goal. Herein, engineering of active sites and electronic framework is implemented via oriented modulation of crystal planes and construction of lacunaris architecture supported by ammonificationelicited simultaneous incorporation of nitrogen and oxygen-defect strategy. The new class porous nitrogen-incorporated Fe 2 PO 5 with oxygen-defect (N-Fe 2 PO 5-x ) polyhedron with dominantly exposed {110} reactive facets exhibits superior performance toward water oxidation, achieving current densities of 10 mA cm −2 at quite low overpotentials of 235 and 315 mV in alkaline and neutral media, respectively. Furthermore, density functional theoretical calculations reveal the energetically favorable {110} planes of lower absorption energy of intermediates and remolding of electronic density framework arising from the ammoniated elicitation process, contributing to excellent OER performance of lacunaris N-Fe 2 PO 5-x polyhedrons. This work may offer a feasible guideline for regulating active sites and electron transfer to develop low-cost and highly efficient OER electrocatalysts in energy conversion systems.

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“…Great efforts have been devoted to address this major technological challenge. For example, some non‐noble‐metal‐based materials were shown to exhibit good OER performance in acidic solution, such as Co‐containing polyoxometalates,95 MnO x ,96 Ti‐stabilized MnO 2 ,97 and iron oxide embedded titania nanowires 98. Thanks to the tremendous research efforts made in the past decades, a great scientific stride has been achieved in the field of non‐noble‐metal‐based OER electrocatalysts.…”

Section: Classification Of the Non‐noble‐metal‐based Oer Electrocatalmentioning

confidence: 99%

Non‐Noble‐Metal‐Based Electrocatalysts toward the Oxygen Evolution Reaction

Zang

et al. 2020

Adv Funct Materials

895

551

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The development of low-cost, high-efficiency, and robust electrocatalysts for the oxygen evolution reaction (OER) is urgently needed to address the energy crisis. In recent years, non-noble-metal-based OER electrocatalysts have attracted tremendous research attention. Beginning with the introduction of some evaluation criteria for the OER, the current OER electrocatalysts are reviewed, with the classification of metals/alloys, oxides, hydroxides, chalcogenides, phosphides, phosphates/borates, and other compounds, along with their advantages and shortcomings. The current knowledge of the reaction mechanisms and practical applications of the OER is also summarized for developing more efficient OER electrocatalysts. Finally, the current states, challenges, and some perspectives for non-noble-metal-based OER electrocatalysts are discussed.

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Iron oxide embedded titania nanowires – An active and stable electrocatalyst for oxygen evolution in acidic media

Cited by 108 publications

References 40 publications

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

Orienting Active Crystal Planes of New Class Lacunaris Fe₂PO₅ Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media

Non‐Noble‐Metal‐Based Electrocatalysts toward the Oxygen Evolution Reaction

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Iron oxide embedded titania nanowires – An active and stable electrocatalyst for oxygen evolution in acidic media

Cited by 108 publications

References 40 publications

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

A Room‐Temperature Postsynthetic Ligand Exchange Strategy to Construct Mesoporous Fe‐Doped CoP Hollow Triangle Plate Arrays for Efficient Electrocatalytic Water Splitting

Orienting Active Crystal Planes of New Class Lacunaris Fe2PO5 Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media

Non‐Noble‐Metal‐Based Electrocatalysts toward the Oxygen Evolution Reaction

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Orienting Active Crystal Planes of New Class Lacunaris Fe₂PO₅ Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media