Highly crystalline β-FeOOH(Cl) nanorod catalysts doped with transition metals for efficient water oxidation

Suzuki, Tomiko M.; Nonaka, Takamasa; Suda, Akihiko; Suzuki, Noritomo; Matsuoka, Yoriko; Arai, Takeo; Sato, Shunsuke; Morikawa, Takeshi

doi:10.1039/c7se00043j

Cited by 43 publications

(40 citation statements)

References 51 publications

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“…31 Hence these results strongly suggested magnetic interaction between Fe in the β-FeOOH:Ni and Ni species in a-Ni(OH) 2 on the surface, which is originated from certain electronic interaction between Fe and Ni. This interaction in the β-FeOOH:Ni/a-Ni(OH) 2 at 2233%-Ni differs from that in the doped β-FeOOH:Ni (1.2 at.%)/CP.…”

Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 91%

“…31 , and that a certain amount of Cl ¹ was contained in the monoclinic crystal structure. Judging from previous reports, the peaks in the range of 711.2711.9 eV in the Fe 2p3 spectra and at 855.9 eV in the Ni 2p are assignable to FeOOH and Ni(OH) 2 , respectively.…”

Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 99%

“…This synthesis employs a combination of spontaneous peptization and Ostwald ripening with the aid of amines to form colloidal solutions of the nanocrystals at room temperature. 31 In addition, the pure β-FeOOH phase obtained by this one-pot, rapid (several hours), room temperature synthesis exhibits OER activity in an order of magnitude greater than those of previous β-FeOOH(Cl) catalysts. 31 The OER current of this highly crystalline β-FeOOH is also greater than those of α-FeOOH, γ-FeOOH, and amorphous FeOOH.…”

Section: Introductionmentioning

confidence: 99%

“…31 In addition, the pure β-FeOOH phase obtained by this one-pot, rapid (several hours), room temperature synthesis exhibits OER activity in an order of magnitude greater than those of previous β-FeOOH(Cl) catalysts. 31 The OER current of this highly crystalline β-FeOOH is also greater than those of α-FeOOH, γ-FeOOH, and amorphous FeOOH. Interestingly, the versatility of this synthetic process also enables doping with a wide variety of transition metals.…”

Section: Introductionmentioning

confidence: 99%

“…31 As shown in Figure 1, FeCl 3 ¢ 6H 2 O, Ni(NO 3 ) 2 ¢6H 2 O and ethylenediamine were added to pure water and adjusted to the appropriate pH, which generated transparent brown-colored aqueous colloidal dispersion after storing for 624 hours stirring at room temperature. Electrodes were constructed by depositing the aqueous colloidal solution of nanorods on carbon paper (CP), followed by washing with an aqueous solution of KOH and then with distilled water to remove any residual species.…”

Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 99%

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Highly Enhanced Electrochemical Water Oxidation Reaction over Hyperfine β-FeOOH(Cl):Ni Nanorod Electrode by Modification with Amorphous Ni(OH)2

Suzuki

Nonaka

Kitazumi

et al. 2018

Bulletin of the Chemical Society of Japan

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received her bachelor and master degrees from Nara Women's University. She joined Toyota CRDL in 1992 and received he Ph.D. Degree from Tokyo Institute of Technology in 2009. Currently, she is a senior researcher of the Morikawa Senior Fellow Laboratory in Toyota CRDL. She has been working on development of inorganic catalyst materials for artificial photosynthesis. Takeshi MorikawaTakeshi Morikawa received his bachelor and master degrees from Nagoya University. He joined Toyota CRDL in 1989 and received his Ph.D. Degree in 2005. He has been working on development of sensors for automotive controls, magnetic materials, semiconductor photocatalyst, and CO 2 recycling systems by artificial photosynthesis. He is currently a manager of the Morikawa Senior Fellow Laboratory in Toyota CRDL. AbstractA highly crystalline, 10 nm-sized red rust water oxidation catalyst composed of pure β-phase FeOOH(Cl) nanorods (ca. 3 © 13 nm) doped with Ni ions (β-FeOOH(Cl):Ni) and surfacemodified with amorphous Ni(OH) 2 (a-Ni(OH) 2 , at a Ni to Fe ratio of 22 at.%) was synthesized by a facile one-pot process at room temperature. The overpotential during the electrochemical oxygen evolution reaction (OER) over the β-FeOOH:Ni/ a-Ni(OH) 2 stacked nanorod anodes was 170 mV, and an OER current of 10 mA/cm 2 was obtained at an overpotential of 430 mV in a 0.1 M KOH solution. X-ray absorption fine structure analysis, Mössbauer spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, X-ray diffraction and impedance spectroscopy suggested that surface modification with the a-Ni(OH) 2 lowered the OER overpotential of β-FeOOH(Cl):Ni, resulting in the very high current density at low potential compared with Fe-rich oxide and oxyhydroxide electrodes reported previously. Mössbauer spectroscopy suggested interaction between Fe and Ni species, which may be crucial evidence for the enhanced activity in the Fe-rich OER system.

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Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 91%

Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Synthesis and Characterization Of Ni Modified β-Feooh Nanorodsmentioning

confidence: 99%

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Highly Enhanced Electrochemical Water Oxidation Reaction over Hyperfine β-FeOOH(Cl):Ni Nanorod Electrode by Modification with Amorphous Ni(OH)2

Suzuki

Nonaka

Kitazumi

et al. 2018

Bulletin of the Chemical Society of Japan

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Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Zhao

Huang

et al. 2022

Advanced Science

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Recently, the rational design and development of efficient faradaic deionization electrodes with high theoretical capacitance, natural abundance, and attractive conductivity have shown great promise for outstanding capacitive deionization (CDI)‐based desalination applications. Herein, the construction of novel FeOOH hybrid heterostructures with Na and Cl dopants (e.g., Na‐FeOOH and Cl‐FeOOH) via a robust hydrothermal strategy is reported, and an asymmetric CDI cell (Na‐FeOOH//Cl‐FeOOH) comprising Na‐FeOOH and Cl‐FeOOH working as the cathode and anode, respectively, is assembled. The multiple coupling effects of the specific structural features (e.g., enriched porosity, hierarchical pore alignment, and highly open crystalline framework), enhanced electrochemical conductivity, and optimized ion‐transfer property endow the FeOOH hybrid electrode with improved electrochemical performance. Impressively, the Na‐FeOOH//Cl‐FeOOH cell demonstrates a superior salt adsorption capacity (SACNaCl) of 35.12 mg g−1 in a 500 mg L−1 NaCl solution, a faster removal rate, and remarkable cycling stability. Moreover, the pseudocapacitive removal mechanism from the synergetic contribution of the Na‐FeOOH cathode and Cl‐FeOOH anode account for the significant desalination promotion of the Na‐FeOOH//Cl‐FeOOH cell.

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Interfacial Engineering FeOOH/CoO Nanoneedle Array for Efficient Overall Water Splitting Driven by Solar Energy

Qiu

Wang

et al. 2019

Chemistry A European J

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Highly crystalline β-FeOOH(Cl) nanorod catalysts doped with transition metals for efficient water oxidation

Abstract: Highly crystalline Ni-doped β-FeOOH(Cl) nanorod catalysts for efficient electrochemical water oxidation were successfully synthesized by a one-pot ambient temperature synthesis.

Cited by 43 publications

References 51 publications

Highly Enhanced Electrochemical Water Oxidation Reaction over Hyperfine β-FeOOH(Cl):Ni Nanorod Electrode by Modification with Amorphous Ni(OH)2

Highly Enhanced Electrochemical Water Oxidation Reaction over Hyperfine β-FeOOH(Cl):Ni Nanorod Electrode by Modification with Amorphous Ni(OH)2

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Interfacial Engineering FeOOH/CoO Nanoneedle Array for Efficient Overall Water Splitting Driven by Solar Energy

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