Nanostructured metallic FeNi2S4 with reconstruction to generate FeNi-based oxide as a highly-efficient oxygen evolution electrocatalyst

Jiang, Jun; Zhang, Yingjie; Zhu, Xiaojiao; Lu, Shixiang; Long, Lulu; Chen, Jie‐Jie

doi:10.1016/j.nanoen.2020.105619

Cited by 74 publications

(48 citation statements)

References 35 publications

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“…As revealed in the high-resolution XPS spectrum of Ni 2p (Fig. S20), the characteristic peaks of Ni 2+ disappeared (853.0 and 870.3 eV), and two peaks at 855.8 and 873.6 eV could be assigned to oxidized nickel species, indicating the oxidation of Ni-Fe-P-S@C after the chronopotentiometry test [24]. For P 2p spectrum (Fig.…”

Section: Resultsmentioning

confidence: 91%

Electronic modulation of Ni2P through anion and cation substitution toward highly efficient oxygen evolution

Zhang

Shen

et al. 2022

Sci. China Mater.

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Rationally designed oxygen evolution reaction (OER) catalysts with structural and compositional superiorities are essential for energy-related electrocatalytic techniques. Transition-metal phosphides have been used as promising electrocatalysts for OER. Incorporating heteroatoms into the lattice can induce lattice distortion and redistribution of electron density, consequently modifying the electronic structure and improving catalytic performance. Herein, Fe-and S-substituted Ni 2 P uniformly dispersed throughout porous carbon substrate (Ni-Fe-P-S@C) was rationally designed through transformation from the pre-synthesized NiFe-metal organic frameworks (NiFe-MOFs) by partial sulfurization and subsequent phosphorization process. Experimental results and density functional theory calculations showed that Fe and S incorporation could modulate the electronic structure of Ni 2 P and alter the adsorption free energies of reaction intermediates, contributing to admirable electrocatalytic activity and stability toward OER. Notably, the in-situ formed partially oxidized surface was vital to further improve the local environment. This proposed cation-and anion-substitution strategy will bring new inspiration to boost the electrocatalytic performance of transition-metal-based electrocatalysts for energy conversion applications.

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Section: Resultsmentioning

confidence: 91%

Electronic modulation of Ni2P through anion and cation substitution toward highly efficient oxygen evolution

Zhang

Shen

et al. 2022

Sci. China Mater.

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“…The enriched electrons in Ni d orbitals after introducing V O are conducive to stabilizing Ni 3+ species and subsequently reducing the Ni 2+/3+ redox potential. 38 Accordingly, as shown in Figure 3b, Ni-Fe LDH-V O presents a lower Tafel slope of 39.6 mV dec −1 than Ni-Fe LDH (67.6 mV dec −1 ) and Ni-Fe LDH-HD (66.9 mV dec −1 ), 40 2: Co-Fe LDH with multivacancies; 41 3: W 6+ -doped Ni(OH) 2 ; 42 4: metallic FeNi 2 S 4 ; 43 5: monolayer Ni-Fe LDH; 44 6: Co 1.2 Fe/C; 45 7: Co(II) 4 Fe(III) 1 hydroxide nanocones; 46 8: NiFe hydroxides; 47 9: NiFeCr oxyhydroxides; 48 10: CoO x with adsorbed Fe 3+ ions. 49 ) (e) η 10 of samples received with a varied volume ratio of water (V H2O /V H2O+EtOH ) in solution.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

“…(d) Comparison of the OER performance with the reported Ni-Fe-based catalysts (ref. sample 1: Ni x Fe 3– x O 4 /Ni nanocomposite; 2: Co-Fe LDH with multivacancies; 3: W 6+ -doped Ni(OH) 2 ; 4: metallic FeNi 2 S 4 ; 5: monolayer Ni-Fe LDH; 6: Co 1.2 Fe/C; 7: Co(II) 4 Fe(III) 1 hydroxide nanocones; 8: NiFe hydroxides; 9: NiFeCr oxyhydroxides; 10: CoO x with adsorbed Fe 3+ ions …”

Section: Resultsmentioning

confidence: 99%

Inherent Oxygen Vacancies Boost Surface Reconstruction of Ultrathin Ni-Fe Layered-Double-Hydroxides toward Efficient Electrocatalytic Oxygen Evolution

Zhou

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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Unraveling structure-related reconstruction during oxygen evolution reaction (OER) and its correlation with intrinsic electrocatalytic activity is of great significance for designing better catalysts but unfortunately remains elusive. Herein, ultrathin Ni-Fe layered-double-hydroxides (LDH) with inherent oxygen vacancies (V O ) are successfully fabricated via coprecipitation under a controlled manner, which accomplish a quite low overpotential of 230 mV at 10 mA cm −2 in 1.0 M KOH and perform among the best of recently reported nonprecious electrocatalysts. During the OER, inherent V O is experimentally and theoretically evidenced to boost surface reconstruction and the operando formation of p−n interfaces (i.e., γ-Ni-Fe LDH/α-Ni-Fe LDH) via deprotonation. On such reconstructed interfaces, the V O in both surface γ-Ni-Fe LDH and bulk α-Ni-Fe LDH can alter the electron densities of metal sites and subsequently optimize the free energies of a multistep OER pathway, which accounts for the boosted OER activity and, more importantly, identifies the correlation of electrocatalysis with both the catalyst surface and bulk.

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“…There is no report about photovoltaic activity of FeNi 2 S 4 based electrodes. For example, P. Guo et al [19] synthesized FeNi2S4 QDs@C composites and used as anode materials for lithium ion battery, which provide a areal high capacity of 920 mAhg − 1 at 0. called FNS. In the composite sample preparation process, the sum of graphene was managed to be 0, 0.5, 1, and 5 wt % in the FeNi 2 S 4 -graphene composites, and the respective samples were referred as CNS, FNSG0.5, FNSG1, and FNSG5, collectively.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of Pt-free FeNi2S4/rGO hybrid composite thin films counter electrode for high-performance dye-sensitized solar cells

Sankar

Anbarasu

Mahendran

et al. 2021

J Mater Sci: Mater Electron

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In this report, for the rst time synthesized FeNi 2 S 4 /rGO composite as Pt free counter electrode (CE) by facile hydrothermal method without employing template or surfactant. Complete investigations of phase evolutions by XRD patterns and TEM indicate that spinel structure with nanosheets and nanospherical morphologies. The individual spherical shaped nanoparticles (30-35 nm) of FeNi 2 S 4 were exploited on the 2D ultrathin rGO nanosheets surface. This is useful for the provision of further electrolyte adsorptions and responsive electrocatalytic sites. The DSSC constructed with FeNi 2 S 4 /rGO hybrid composite CE showed a conversion e ciency of 9.98%, better than that by FeNi 2 S 4 CE (4.87%) and also commercial Pt (6.21%). The outstanding e ciency of the FeNi 2 S 4 /rGO hybrid composite CE even better than commercial Pt is effective alternative to Pt CE in the DSSCs.

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Nanostructured metallic FeNi2S4 with reconstruction to generate FeNi-based oxide as a highly-efficient oxygen evolution electrocatalyst

Cited by 74 publications

References 35 publications

Electronic modulation of Ni2P through anion and cation substitution toward highly efficient oxygen evolution

Electronic modulation of Ni2P through anion and cation substitution toward highly efficient oxygen evolution

Inherent Oxygen Vacancies Boost Surface Reconstruction of Ultrathin Ni-Fe Layered-Double-Hydroxides toward Efficient Electrocatalytic Oxygen Evolution

Design and fabrication of Pt-free FeNi2S4/rGO hybrid composite thin films counter electrode for high-performance dye-sensitized solar cells

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