Nickel foam as conductive substrate enhanced low-crystallinity two-dimensional iron hydrogen phosphate for oxygen evolution reaction

De, Wang; Xu, Yanbin; Guo, Xiaoling; Fu, Zhenyu; Yang, Zhiping; Sun, Wenjuan

doi:10.1016/j.jallcom.2021.159472

Cited by 18 publications

(17 citation statements)

References 57 publications

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“…Among them, CNPO-20 has the lowest overpotential (378 mV), even lower than RuO 2 (418 mV), and it also has the smallest Tafel slope (60.79 mV dec –1 , Figure S9A,B), indicating a more later speed control step and a faster oxygen evolution rate . Additionally, its overpotential (Figure B) is also superior to the currently reported phosphate-based (e.g., NaCoP 2 O 7 : 386 mV; Mesoporous CoNiPi: 402 mV; Co–Zn-Pi: 382 mV; Fe 5 (PO 4 ) 4 (OH) 3 ·2H 2 O: 442 mV; and FeHPO 4 : 465 mV) and other OER catalysts (e.g., Co 3 O 4 /BP: 400 mV, CoFe 2 O 4 : 408 mV, ZnCo 2 O 4 : 389 mV, Co 0.54 Fe 0.46 OOH: 390 mV, Co 0.5 Fe 0.5 WO 4 : 400 mV, and NaCoP 2 O 7 : 386 mV).…”

Section: Resultsmentioning

confidence: 86%

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Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Recently, design of cost-effective multifunctional electromaterials for supercapacitors and oxygen evolution reaction (OER) and enhancing their functionalities have become an emphasis in energy storage and conversion. Herein, a series of cheap and functional phosphate composites with different ratios of cobalt and nickel are synthesized using a simple polyalcohol refluxing method, and their excellent capacity and OER properties are systematically studied. Notably, owing to the different major role of Co and Ni elements in the phosphate composites for capacity and OER, the optimal electroconductibility, structural adjustment, electrochemical active sites, and activities for capacity and OER are obtained from the composites with the different ratios of Co/Ni. In addition, using high-capacity BiPO4 (BPO) as the negative electrodes, the new type of all-phosphate asymmetric supercapacitor (CNPO-40//BPO) shows a high energy density and reaches 36.84 W h kg–1 at a power density of 254.52 W kg–1. Its cyclic stability is also more excellent than that of the CNPO-40//AC device using commercial activated carbon as the negative electrodes. This study is beneficial to the more in-depth research on efficient dual-function electromaterials in capacity and OER and provides a high-efficient way to improve the practicality of asymmetric supercapacitors using the high-capacity Bi-based electromaterials as the negative electrodes.

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Section: Resultsmentioning

confidence: 86%

“…In addition, a H–O bonded bending shock absorption peak (1457 cm –1 ) in the HPO 4 2– group and other P–O absorption peaks (1031 and 509 cm –1 ) are also obtained from FT-IR (Figure S1B). ,− …”

Section: Resultsmentioning

confidence: 99%

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…In recent decades, transition-metal oxides (TMOs), such as NiO, − Fe 3 O 4 , , and Co 3 O 4 , ,, have been a promising class of non-noble metal electrocatalysts for OER electrocatalysts due to their rich resource and unique d-electron structure. ,,− Among them, NiO is considered to be an attractive OER electrocatalyst due to its high activity and facile preparation. For example, Bent et al prepared porous NiO thin films via atomic layer deposition, which exhibited good OER electrocatalytic performance .…”

Section: Introductionmentioning

confidence: 99%

NiO–NiMoO₄ Nanocomposites on Multi-Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Total Water Splitting

Xue

Hao

et al. 2023

ACS Appl. Mater. Interfaces

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Multicomponent synergistic regulation and defect design have been effective strategies to enhance the electrocatalytic activity of transition-metal oxides. In this work, NiO and NiMoO 4 nanocomposites on multi-walled carbon nanotubes (termed NiO−NiMoO 4 /mCNTs) are synthesized through a two-step method. Physical characterizations show NiO−NiMoO 4 /mCNTs have a well-defined NiO−NiMoO 4 structure, large specific surface area, and abundant oxygen vacancies. For oxygen evolution reaction (OER), NiO−NiMoO 4 /mCNTs deliver lower overpotential (277 mV) than NiO/mCNTs, NiO, and commercial RuO 2 nanocrystals at 10 mA cm −2 . For hydrogen evolution reaction (HER), NiO−NiMoO 4 /mCNTs still show the best HER activity, manifested by the smallest onset potential and the lowest Tafel. Density functional theory calculations show that the adsorption energies of hydrogen-and oxygen-containing intermediates on the NiO−NiMoO 4 /mCNTs surface have changed, which can lower the energy barriers required for HER and OER. The excellent electrocatalytic activity of bifunctional NiO−NiMoO 4 /mCNTs for OER and HER can be attributed to the synergy effect between NiO, NiMoO 4 , and mCNTs. A symmetrical two-electrode water electrolyzer with NiO− NiMoO 4 /mCNTs as both the cathode and anode are constructed, which can reach a current density of 10 mA cm −2 and only requires 1.57 V.

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“…Several self-helping materials with strong polarization current density and considerable geometric area have recently been reported; they have been obtained by using stainless steel, carbon paper, and nickel foam (NF) as growth substrates. − Compared with stainless steel and carbon paper, NF often exhibits a higher OER performance because of its superior conductivity and larger surface area. Porous NF is a suitable choice of electrode material for practical applications . NF is characterized by an extremely large surface area and open-pore hierarchical structures that promote robust catalytic activity by increasing the size of the catalyst–NF interface, thereby boosting electronic and ionic conductivity. − Furthermore, the addition of carbon nanotubes (CNT) to the composite material may not only increase the conductivity of the electrode but also provide more nucleation sites for spinel growth.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Zn-Substituted FeCo₂O₄ for the Oxygen Evolution Reaction and Reaction Mechanism Monitoring through In Situ Near-Ambient-Pressure X-ray Photoelectron Spectroscopy

Patta,

Chen,

Natesan

et al. 2023

ACS Catal.

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Fe 1−x Co 2 O 4 , 0 < x < 0.6 in intervals of 0.2) on nickel foam (NF) is synthesized through a hydrothermal process, and carbon nanotubes (CNTs) are embedded in NF to provide additional conductivity and nucleation sites for the catalyst. Zn ions are used as a substitute for Fe in FeCo 2 O 4 to increase the material's electrochemical surface area and provide more active sites for electron transport at the electrode−electrolyte interface. Sufficient Zn substitution greatly promotes oxygen evolution reaction (OER) activity, and Zn 0.4 Fe 0.6 Co 2 O 4 /NF is discovered to exhibit the highest OER performance, reaching an overvoltage of 330 mV at a current density of 50 mA cm 2 in 1 M NaOH. Zn 0.4 Fe 0.6 Co 2 O 4 / CNT/NF has a charge transfer resistance of 2.549 Ω and an active surface area of 526 cm 2 . In situ near-ambient-pressure X-ray photoelectron spectroscopy directly confirms the variation of the electrode surface composition during OER and shows that the highest percentage of CoO 2 (about 51%) grows on the catalyst surface, resulting in increased surface oxygen adsorption. We identify Co(IV) as an intermediate in the OER adsorption, forming a superoxide species that is the key intermediate in oxygen gas generation.

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Nickel foam as conductive substrate enhanced low-crystallinity two-dimensional iron hydrogen phosphate for oxygen evolution reaction

Cited by 18 publications

References 57 publications

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

NiO–NiMoO₄ Nanocomposites on Multi-Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Total Water Splitting

Investigation of Zn-Substituted FeCo₂O₄ for the Oxygen Evolution Reaction and Reaction Mechanism Monitoring through In Situ Near-Ambient-Pressure X-ray Photoelectron Spectroscopy

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Nickel foam as conductive substrate enhanced low-crystallinity two-dimensional iron hydrogen phosphate for oxygen evolution reaction

Cited by 18 publications

References 57 publications

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction

NiO–NiMoO4 Nanocomposites on Multi-Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Total Water Splitting

Investigation of Zn-Substituted FeCo2O4 for the Oxygen Evolution Reaction and Reaction Mechanism Monitoring through In Situ Near-Ambient-Pressure X-ray Photoelectron Spectroscopy

Contact Info

Product

Resources

About

NiO–NiMoO₄ Nanocomposites on Multi-Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Total Water Splitting

Investigation of Zn-Substituted FeCo₂O₄ for the Oxygen Evolution Reaction and Reaction Mechanism Monitoring through In Situ Near-Ambient-Pressure X-ray Photoelectron Spectroscopy