Synergistic effect of multiple vacancies to induce lattice oxygen redox in NiFe-layered double hydroxide OER catalysts

Zhai, Yiyue; Ren, Xiangrong; Sun, Yu; Deng, Li; Wang, Bolun; Liu, Shengzhong

doi:10.1016/j.apcatb.2022.122091

Cited by 200 publications

(84 citation statements)

References 55 publications

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“…The Faradaic efficiency (FE) of the micro–nano-Ni electrode (sample b) was measured via the comparison of theoretical and experimental evolved gas values at the condition of chronoamperometric constant potential. , As shown in Figure , the micro–nano-Ni electrode (sample b) exhibited a fairly stable oxygen production rate, indicative of a nearly 85% FE for the OER.…”

Section: Resultsmentioning

confidence: 99%

“…The chronopotentiometric curve of typical sample b at a current density of 10 mA/ cm 2 is shown in Figure 12. Sample b was found to be stable for 50 h at 10 mA/cm 2 in 1 M KOH at room temperature, and the 38,39 As shown in Figure 13, the micro−nano-Ni electrode (sample b) exhibited a fairly stable oxygen production rate, indicative of a nearly 85% FE for the OER.…”

Section: Surface Wettabilitymentioning

confidence: 97%

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Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Jiang

et al. 2023

ACS Appl. Energy Mater.

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Hydrogen production from water electrolysis using transition metal-based catalysts is a hot research topic at present, and the oxygen evolution reaction (OER) will directly affect the efficiency of water electrolysis. In this work, nickel metal electrodes with micro−nanostructures were rapidly prepared on the surface of a stainless steel substrate by magnetic field-assisted jet electrodeposition (MAJE) and the OER performance of the micro−nanonickel electrode in electrolytic water was mainly studied. By adding magnetic nano-nickel particles to the electrolyte, the nano-nickel particles reached the electrode surface and were firmly adsorbed by the magnetic field with the flow of the electrolyte. The results showed that the surface morphologies and the preferred growth orientation of nickel electrodes changed in MAJE. In MAJE, when the amount of nano-nickel particles was 2 g/L, the micro−nano-nickel electrode exhibited excellent OER catalytic performance with an overpotential of 274 mV at a current density of 10 mA•cm −2 and a lower Tafel slope of 33.2 mV dec −1 under alkaline conditions. This study confirmed that MAJE had certain advantages in the preparation of metal-based catalytic electrodes, which provided an idea for the research of catalytic electrodes for hydrogen production by electrolysis of water.

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Section: Resultsmentioning

confidence: 99%

Section: Surface Wettabilitymentioning

confidence: 97%

Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Jiang

et al. 2023

ACS Appl. Energy Mater.

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“…Compared with the BSO, the binding energies for Sb 3d and Bi 4f over BSO-10 shift to a higher value, which may be due to the fact that the OVs could capture electrons and decrease the electron cloud density around Bi and Sb, thus changing the chemical environment of Bi and Sb elements. Figure d is the high-resolution O 1s image; the peaks can be split into hydrated species O–H (531.65 and 532.26 eV) on the surface of BSO and BSO-10 and lattice oxygen (530.60 and 530.87 eV). , The information of O 1s peaks of BSO and BSO-10 after curve fitting is given in Table . Moreover, sputter etching (depth: 20 nm) of XPS was performed to study the O atom content of BSO and BSO-10.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Adsorption and Dissociation of H₂O Facilitates Photocatalytic CO₂ Reduction on Defective BiSbO₄

et al. 2023

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The dissociation of H2O molecules plays an important role in producing protons for promoting hydrogenation reduction of CO2. Therefore, developing excellent photocatalysts to promote the dissociation of H2O molecules and reveal the effect mechanism is the key research direction to enhance CO2 reduction efficiency. In this work, we synthesized BiSbO4 with oxygen vacancies (OVs) to investigate the photocatalytic mechanism of CO2 conversion and H2O dissociation. Experimental results indicate that the introduction of OVs into BiSbO4 can enhance the absorption capacity of light, narrowing band gaps and impeding the recombination of photogenerated carriers. Importantly, the existence of OVs in BiSbO4 can promote the adsorption and activation of H2O molecules via the stronger covalent interaction, which facilitates the dissociation of H2O molecules to generate more protons and lowers the energy barriers of •COOH to improve the efficiency of CO2 reduction. This study reinforces our understanding of the principle of photocatalytic CO2 reduction and the important role of H2O dissociation in photocatalytic CO2 conversion.

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“…The modulated electronic environment determined the superior OER performance. Based on the above analysis, it is easily concluded that the vacancy strategy is an efficient approach to enhance the electrocatalytic performance of LDH materials, which also has developed as a convenient method to construct superior LDH materials [ 133 , 134 ].…”

Section: Vacancy Strategymentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Bao

Liu

et al. 2023

Molecules

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Water splitting technology is an efficient approach to produce hydrogen (H2) as an energy carrier, which can address the problems of environmental deterioration and energy shortage well, as well as establishment of a clean and sustainable hydrogen economy powered by renewable energy sources due to the green reaction of H2 with O2. The efficiency of H2 production by water splitting technology is intimately related with the reactions on the electrode. Nowadays, the efficient electrocatalysts in water splitting reactions are the precious metal-based materials, i.e., Pt/C, RuO2, and IrO2. Ni (Co, Fe)-based layered double hydroxides (LDH) two-dimensional (2D) materials are the typical non-precious metal-based materials in water splitting with their advantages including low cost, excellent electrocatalytic performance, and simple preparation methods. They exhibit great potential for the substitution of precious metal-based materials. This review summarizes the recent progress of Ni (Co, Fe)-based LDH 2D materials for water splitting, and mainly focuses on discussing and analyzing the different strategies for modifying LDH materials towards high electrocatalytic performance. We also discuss recent achievements, including their electronic structure, electrocatalytic performance, catalytic center, preparation process, and catalytic mechanism. Furthermore, the characterization progress in revealing the electronic structure and catalytic mechanism of LDH is highlighted in this review. Finally, we put forward some future perspectives relating to design and explore advanced LDH catalysts in water splitting.

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Synergistic effect of multiple vacancies to induce lattice oxygen redox in NiFe-layered double hydroxide OER catalysts

Cited by 200 publications

References 55 publications

Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Enhanced Adsorption and Dissociation of H₂O Facilitates Photocatalytic CO₂ Reduction on Defective BiSbO₄

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

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Synergistic effect of multiple vacancies to induce lattice oxygen redox in NiFe-layered double hydroxide OER catalysts

Cited by 200 publications

References 55 publications

Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Electrocatalytic Performance of Micro–Nano-Nickel Electrodes via Magnetic Field-Assisted Jet Electrodeposition Method

Enhanced Adsorption and Dissociation of H2O Facilitates Photocatalytic CO2 Reduction on Defective BiSbO4

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

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Enhanced Adsorption and Dissociation of H₂O Facilitates Photocatalytic CO₂ Reduction on Defective BiSbO₄