MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

Wang, Qianqian; Song, Yanyan; Sun, Dongfa; Zhang, Lixue

doi:10.1021/acsomega.1c01132

Cited by 23 publications

(19 citation statements)

References 37 publications

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“…The higher conductivity and OER activity of Ni@NiNCNT than the individual Ni nanoparticle and Ni–N–CNSs suggest that the synergy between the Ni nanoparticle and Ni–N–CNSs plays an important role in improving the overall performance of Ni@NiNCNT. Actually, the OER performance of Ni@NiNCNT is comparable or superior to most of previous reports (Figure d). − …”

Section: Resultssupporting

confidence: 74%

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

Zhang

Feng

et al. 2022

Energy Fuels

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Single atom catalysts (SACs) have received considerable attention due to their high-atomic-utilization efficiency and tunable activity and selectivity. Here, in combination of experiments and calculations, we demonstrated that the electronic structures and the oxygen evolution reaction (OER) activity of the confined Ni SAC in a nitrogen-doped carbon nanotube are modulated by the encapsulated Ni nanoparticle (Ni@NiNCNT). The synergistic interaction between Ni SAC and Ni nanoparticle endows the Ni@NiNCNT with a satisfactory OER performance of 358 mV to achieve 10 mA cm–2 current density and a Tafel slope of 89 mV dec–1, superior to the control samples and commercial RuO2. In addition, when employed as an air-cathode catalyst for rechargeable zinc–air batteries (ZABs), a Ni@NiNCNT modified battery outperformed a Pt/C+RuO2 modified battery, with a higher power density and superior constant current charge–discharge cycle stability for 40 h. Theoretical simulations further revealed that the Ni nanoparticle can remarkably optimize the adsorption strength of oxygen atom on Ni SAC, leading to a small overpotential of 0.22 V for the rate-limiting step of *O formation. Furthermore, the charge transfer from Ni nanoparticle to Ni SAC, which handles Ni-d orbital characters of Ni SAC and accordingly the adsorption strength toward oxygenates, is responsible for the origin of the OER activity. Our results provide a new way to tune electronic structures of the SAC and thus to tune its catalytic activity and should be insightful for designing new type electrocatalysts based on SAC.

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Section: Resultssupporting

confidence: 74%

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

Zhang

Feng

et al. 2022

Energy Fuels

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“…However, the lower the diameter of the arc, the lesser will be the charge transfer resistance resulting in faster electron transfer at the electrode–electrolyte interface. Co 3 S 4 -3h possessed the smallest arc ( R ct ) among all Co 3 S 4 -T products, which became beneficial for the smooth progress of OER in an alkaline medium. , The inset in Figure d displays the corresponding equivalent circuit diagram.…”

Section: Resultsmentioning

confidence: 99%

“…Co 3 S 4 -3h possessed the smallest arc (R ct ) among all Co 3 S 4 -T products, which became beneficial for the smooth progress of OER in an alkaline medium. 61,62 The inset in Figure 5d displays the corresponding equivalent circuit diagram. Furthermore, the electrochemical accessible surface area (ECSA) for all the Co 3 S 4 -T products was investigated by determining C dl from CV curves in the non-faradaic potential window of 1.12 to 1.22 V vs RHE by varying the scan rates, as shown in Figure S10.…”

Section: Synthesis Of Co-mof (Co-t-bpy)mentioning

confidence: 99%

MOF-Derived Co₃S₄ Nanoparticles Embedded in Nitrogen-Doped Carbon for Electrochemical Oxygen Production

Sahu

Behera

2023

ACS Appl. Nano Mater.

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The development of a simple and effective strategy for designing a highly efficient oxygen evolution electrocatalyst is more important to speed up the efficiency-limiting step involved in water electrolysis. The high efficiency of the oxygen evolution reaction (OER) is directly correlated with the class of electrode materials employed. This work reports a series of Co3S4 nanoparticles (Co3S4-2h, Co3S4-3h, and Co3S4-4h) derived from a metal–organic framework (MOF) via a single-step annealing strategy with varying reaction times for the study of OER. During the annealing process, the MOF precursor [Co3(tiron-bpy)2(bpy)(H2O)8]·(H2O)2 termed as Co-T-BPY directly converted to cobalt sulfide (Co3S4) nanoparticles, along with additional support of the N-doped carbon moiety. Interestingly, variation of reaction time in a fixed temperature condition played a decisive role in optimizing the surface area with huge active sites of the derived products. The optimized Co3S4-3h product needed an overpotential of 285 mV to reach 10 mA cm–2 current density and an acceptable Tafel value (109 mV dec–1) with excellent 14 h of stability performance under harsh alkaline conditions. The OER results are attributed to the combined effect of the Co3S4 phase and N-doped carbon matrix, resulting in substantial stability and high conductivity. Therefore, we believe that the time variation strategy for the preparation of a cobalt-based non-precious electrode material can pave the way in search of an OER-efficient electrocatalyst.

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“…S7 in the ESI,† in the high-resolution Fe 2p spectrum of different samples, the peak position and relative peak intensity did not change significantly, indicating that iron exists in a relatively stable form. The results of XPS indicate that there are abundant oxide bridges in Co 3− x Fe x O 4 -0.01, and the doping of Fe is conducive to adjusting the electronic structure, 49,50 which undoubtedly makes Co 3− x Fe x O 4 -0.01 have great potential for the OER.…”

Section: Resultsmentioning

confidence: 99%

An Fe-doped Co-oxide electrocatalyst synthesized through a post-modification method toward advanced water oxidation

Zuo

Shi

et al. 2022

Dalton Trans.

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MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

Cited by 23 publications

References 37 publications

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

MOF-Derived Co₃S₄ Nanoparticles Embedded in Nitrogen-Doped Carbon for Electrochemical Oxygen Production

An Fe-doped Co-oxide electrocatalyst synthesized through a post-modification method toward advanced water oxidation

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MOF-Derived Fe-Doped Ni@NC Hierarchical Hollow Microspheres as an Efficient Electrocatalyst for Alkaline Oxygen Evolution Reaction

Cited by 23 publications

References 37 publications

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

Tuning d Orbital of Ni Single Atom by Encapsulating Ni Nanoparticle in Carbon Nanotube for Efficient Oxygen Evolution Reaction

MOF-Derived Co3S4 Nanoparticles Embedded in Nitrogen-Doped Carbon for Electrochemical Oxygen Production

An Fe-doped Co-oxide electrocatalyst synthesized through a post-modification method toward advanced water oxidation

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MOF-Derived Co₃S₄ Nanoparticles Embedded in Nitrogen-Doped Carbon for Electrochemical Oxygen Production