One-step electrodeposition of NixFe3−xO4/Ni hybrid nanosheet arrays as highly active and robust electrocatalysts for the oxygen evolution reaction

Li, Dongjie; Liu, Suqin; Ye, Guanying; Zhu, Weiwei; Zhao, Kuangmin; Luo, Meng; He, Zhen

doi:10.1039/d0gc00168f

Cited by 33 publications

(23 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to reveal their intrinsic activity regardless of the effect of the surface morphology, the electrochemically active surface area (ECSA) of these samples was estimated by measuring their double‐layer capacitance ( C dl ) (Figure S12, Supporting Information). [ 16 ] The current density was recalculated according to the ECSA instead of the geometric area of the electrode (Figure S13, Supporting Information). The electrode with TiB 2 remains the highest electrochemical activity among the samples by deducting the contribution of the double‐layer capacitance.…”

Section: Resultsmentioning

confidence: 99%

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries

Huang

Liu

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Fundamental kinetics of the V2+/V3+ of vanadium redox flow battery (VRFB) are still not well understood despite tremendous efforts in improving the sluggish kinetics of V2+/V3+. This article first reveals the rate‐determining step in the electrochemical oxidation of V2+ to V3+ by exploring the reaction kinetics. Thereafter, TiB2 with abundant electron‐deficient sites, which possesses a strong electron‐accepting ability, is demonstrated to improve the rate‐determining step of V2+/V3+ by enhancing the electron transfer from V2+ to the electrode. The mechanism of TiB2 for boosting V2+/V3+ kinetics is also unraveled by analyzing the reaction order. VRFB with the electron‐deficient TiB2 demonstrates a remarkable enhancement in the electrochemical performance, exhibiting an excellent rate performance from 70 to 300 mA cm−2. The energy efficiency is improved by 14.06% compared to the cell with the pristine electrode at 150 mA cm−2 for 300 cycles. This study is critical for not only proposing the promising electron‐deficient catalyst in VRFB application but also promoting fundamental understanding and offering a design strategy for achieving superior performance electrocatalysts in VRFB.

show abstract

Section: Resultsmentioning

confidence: 99%

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries

Huang

Liu

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…79,80 The deconvolution of the high-resolution Ni 2p spectrum of Ni@SS (Fig. 3b) exhibits a peak at 852.68 eV, which was assigned to the zero-oxidation state of nickel (Ni 0 ); 27,81,82 and doublet peaks of Ni 2+ peaks (855.56 and 873.19 eV) and Ni 3+ peaks (857.61 and 875.4 eV) due to the surface oxidation of metallic nickel when exposed to air; 83–85 and the other three peaks at around 860.95, 863.21, and 879.39 eV can be assigned to the satellite peaks of the oxidized Ni species (labelled as “Sat.”). 81,86,87 Remarkably, the binding energies of Ni 2p peaks for 15NiP@SS shift positively compared with those of pure Ni@SS (≈0.34 and ≈0.35 eV for Ni 2p 3/2 and Ni 2p 1/2 , respectively) and the peak at about 853.05 eV is assigned to Ni δ + (0 < δ < 2) in 15NiP@SS.…”

Section: Resultsmentioning

confidence: 99%

Modifying the 316L stainless steel surface by an electrodeposition technique: towards high-performance electrodes for alkaline water electrolysis

Alhakemy

Nassr

Kashyout

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…[81,82] The spinel oxides are relatively easy to be synthesized and nearly all chemical approaches can be utilized to prepare them. [83][84][85] Until now, more than 100 spinel oxides have been synthesized via different preparation methods. In addition, spinel oxides are relatively good electric conductors, indicating that they are to some degree appropriate to act as electrocatalysts.…”

Section: Spinelsmentioning

confidence: 99%

Structural Variations of Metal Oxide‐Based Electrocatalysts for Oxygen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

including solar, wind, hydro, and biofuel, are highly desired to reduce our reliance on fossil fuels. However, according to the data provided by International Energy Agency, the global energy demand is 120 Mtoe in 2019, most (80%) of which was derived from fossil fuels (coal, natural gas, oil), leading to a huge CO 2 emission (33Gt in 2019). [1][2][3] One of the difficulties hindering the widespread use of these renewable energy sources is their intermittent and unpredictable nature. [4,5] Electrochemical reaction, a promising strategy for converting intermittent electricity into chemical energy, can produce a wide variety of important fuels and chemical feedstock, including hydrogen, hydrocarbons and ammonia. [6][7][8] The feedstocks for these productions obtained from electrochemical reactions can be offered by abundant and universal source, such as water, carbon dioxide and nitrogen. In last decades, due to the net-zero carbon emission features, electrochemical reactions have initiated extensive investigations based on water splitting reaction, nitrogen reduction reaction (NRR) and carbon dioxide reduction reaction. [9][10][11][12] In these green technologies, electrocatalytic oxygen evolution reaction (OER), a core reaction of these process, has a direct impact on device efficiency and cost effectiveness (Figure 1). [13,14] However, OER involves multistep four-electron transferring steps associated with OH breaking and OO formations, thus suffering from sluggish kinetics and requiring a high energy loss (high potential). Therefore, efficient and stable OER electrocatalysts are required to make these renewable energy storage/conversion processes to be viable and scalable technologies. [15,16,221,222] The OER catalysts can be classified into two categories: [17,18] molecular catalysts for homogeneous system and solid catalysts for heterogeneous system. In the homogeneous catalytic system, the molecular catalysts and the electrolyte are in solution, and the OER takes place in the liquid phase. The performance of molecular OER catalysts can be explained and understood at a molecular level by many relatively simple spectroscopic physicochemical techniques. Based on the mechanistic understanding at a molecular level, their geometric and electronic properties are much easier to be fine-tuned to achieve optimum performance by careful selection of the metal ion and ligand environment. Despite all these advantages, molecular catalysts are still not appropriate to be used in practical Electrocatalytic oxygen evolution reaction (OER), an important electrode reaction in electrocatalytic and photoelectrochemical cells for a carbonfree energy cycle, has attracted considerable attention in the last few years. Metal oxides have been considered as good candidates for electrocatalytic OER because they can be easily synthesized and are relatively stable during the OER process. However, inevitable structural variations still occur to them due to the complex reaction steps and harsh working conditions of OER, thus impending the ...

show abstract

One-step electrodeposition of Ni_xFe_3−xO₄/Ni hybrid nanosheet arrays as highly active and robust electrocatalysts for the oxygen evolution reaction

Abstract: NixFe3−xO4/Ni hybrid nanosheet arrays have been directly fabricated on different substrates via template-free and annealing-free one-step electrodeposition, which show excellent catalytic performance for the oxygen evolution reaction.

Cited by 33 publications

References 48 publications

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries

Modifying the 316L stainless steel surface by an electrodeposition technique: towards high-performance electrodes for alkaline water electrolysis

Structural Variations of Metal Oxide‐Based Electrocatalysts for Oxygen Evolution Reaction

Contact Info

Product

Resources

About

One-step electrodeposition of NixFe3−xO4/Ni hybrid nanosheet arrays as highly active and robust electrocatalysts for the oxygen evolution reaction

Abstract: NixFe3−xO4/Ni hybrid nanosheet arrays have been directly fabricated on different substrates via template-free and annealing-free one-step electrodeposition, which show excellent catalytic performance for the oxygen evolution reaction.

Cited by 33 publications

References 48 publications

Electron‐Deficient Sites for Improving V2+/V3+ Redox Kinetics in Vanadium Redox Flow Batteries

Electron‐Deficient Sites for Improving V2+/V3+ Redox Kinetics in Vanadium Redox Flow Batteries

Modifying the 316L stainless steel surface by an electrodeposition technique: towards high-performance electrodes for alkaline water electrolysis

Structural Variations of Metal Oxide‐Based Electrocatalysts for Oxygen Evolution Reaction

Contact Info

Product

Resources

About

One-step electrodeposition of Ni_xFe_3−xO₄/Ni hybrid nanosheet arrays as highly active and robust electrocatalysts for the oxygen evolution reaction

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries

Electron‐Deficient Sites for Improving V²⁺/V³⁺ Redox Kinetics in Vanadium Redox Flow Batteries