Synergetic regulation of CeO2 modification and (W2O7)2- intercalation on NiFe-LDH for high-performance large-current seawater electrooxidation

Li, Mingzhe; Niu, Hua‐Jie; Li, Yilong; Liu, Jiawei; Yang, Xiayuan; Lv, Yuzhen; Chen, Kepi; Zhou, Wei

doi:10.1016/j.apcatb.2023.122612

Cited by 43 publications

(20 citation statements)

References 58 publications

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“…When the potential was increased to 1.4 V, the Raman signals of stretching and bending vibration modes for Ni III –O/Co III –O belonging to γ-NiCoOOH became obvious. It is obvious that NiCo 2 S 4 /Ni 9 S 8 transforms into the component of NiCoOOH at ∼1.4 V, while NiCo 2 S 4 and Ni 9 S 8 change at ∼1.5 and 1.45 V, respectively (Figure S6), indicating that NiCo 2 S 4 /Ni 9 S 8 can be easily electro-oxidized than its counterparts of NiCo 2 S 4 and Ni 9 S 8 . , This faster surface reconstruction of NiCo 2 S 4 /Ni 9 S 8 to NiCoOOH active phase can effectively accelerate the OER process, minimize side reaction, and save energy.…”

Section: Resultsmentioning

confidence: 99%

Interface of Nickel Sulfides Optimizing Surface Reconstruction toward Efficient Bifunctional Oxygen Electrocatalysis in Rechargeable Zinc-Air Batteries

Yan,

Che,

Song

et al. 2023

ACS Appl. Energy Mater.

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The air electrode of rechargeable zinc-air batteries (ZABs) suffers from four-electron sluggish kinetics of the oxygen evolution and reduction reactions (OER/ ORR) and surface reconstruction caused by electro-oxidation of the OER process. Therefore, it is crucial to fabricate efficient bifunctional OER and ORR catalysts with optimized reconstruction. Herein, we synthesized double-layered core−shell spheres composed of nanoparticles ∼15 nm in size with NiCo 2 S 4 /Ni 9 S 8 interfaces. Easily accessible to the inner and outer shells, the special porous structure endows a much enhanced specific surface area. The as-prepared catalytic material shows well-matched bifunctional catalytic activity toward the OER (η 10 = 286 mV) and ORR (E 1/2 = 0.85 V) with a lower oxygen potential gap of 0.7 V, better than its counterpart of commercial Pt/C + RuO 2 (0.8 V). The resulting ZAB also exhibits high peak power density (162 mW cm −2 ) and charge−discharge durability (more than 260 h without attenuation). It was confirmed that the NiCo 2 S 4 /Ni 9 S 8 interface can accelerate the OER surface reconstruction process, optimize the catalytic activity, and boost the charge−discharge kinetic rate. Especially, the redox pairs of Ni 3+ /Ni 2+ and Co 3+ /Co 2+ can provide extra battery capacity for ZAB besides the OER/ORR during charge−discharge processes.

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Section: Resultsmentioning

confidence: 99%

Interface of Nickel Sulfides Optimizing Surface Reconstruction toward Efficient Bifunctional Oxygen Electrocatalysis in Rechargeable Zinc-Air Batteries

Yan,

Che,

Song

et al. 2023

ACS Appl. Energy Mater.

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“…According to hard soft acids bases principle, harder bases prefer to adsorb harder acids. [48] Consequently, CO 3 2À À -(Fe)NiOOH tends to adsorb OH À rather than Cl À , which illustrates the better selectivity of alkaline seawater OER on (NiFe)C 2 O 4 than that on (NiFe)(OH) 2 .…”

Section: Methodsmentioning

confidence: 96%

Carbon Oxyanion Self‐Transformation on NiFe Oxalates Enables Long‐Term Ampere‐Level Current Density Seawater Oxidation

Li,

Yao,

Sun

et al. 2023

Angew Chem Int Ed

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Seawater electrolysis is an attractive way of making H2 in coastal areas, and NiFe‐based materials are among the top options for alkaline seawater oxidation (ASO). However, ample Cl− in seawater can severely corrode catalytic sites and lead to limited lifespans. Herein, we report that in situ carbon oxyanion self‐transformation (COST) from oxalate to carbonate on a monolithic NiFe oxalate micropillar electrode allows safeguard of high‐valence metal reaction sites in ASO. In situ/ex situ studies show that spontaneous, timely, and appropriate COST safeguards active sites against Cl− attack during ASO even at an ampere‐level current density (j). Our NiFe catalyst shows efficient and stable ASO performance, which requires an overpotential as low as 349 mV to attain a j of 1 A cm−2. Moreover, the NiFe catalyst with protective surface CO32− exhibits a slight activity degradation after 600 h of electrolysis under 1 A cm−2 in alkaline seawater. This work reports effective catalyst surface design concepts at the level of oxyanion self‐transformation, acting as a momentous step toward defending active sites in seawater‐to‐H2 conversion systems.

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“…These include organophosphorus layers over NiCo–LDH to protect against corrosion. 155 Similarly, NiFe–LDHs have been combined with CeO 2 , 156 Cu 2 S, 157 Ni 3 Fe, 158 and MnCo 2 O 4 159 to increase the corrosion protective properties of the composites.…”

Section: D Electrocatalysts For the Production Of Hydrogenmentioning

confidence: 99%

2D layered double hydroxides and transition metal dichalcogenides for applications in the electrochemical production of renewable hydrogen

Alves,

Kasturi,

Collins

et al. 2023

Mater. Adv.

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Synergetic regulation of CeO2 modification and (W2O7)2- intercalation on NiFe-LDH for high-performance large-current seawater electrooxidation

Cited by 43 publications

References 58 publications

Interface of Nickel Sulfides Optimizing Surface Reconstruction toward Efficient Bifunctional Oxygen Electrocatalysis in Rechargeable Zinc-Air Batteries

Interface of Nickel Sulfides Optimizing Surface Reconstruction toward Efficient Bifunctional Oxygen Electrocatalysis in Rechargeable Zinc-Air Batteries

Carbon Oxyanion Self‐Transformation on NiFe Oxalates Enables Long‐Term Ampere‐Level Current Density Seawater Oxidation

2D layered double hydroxides and transition metal dichalcogenides for applications in the electrochemical production of renewable hydrogen

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