Nanocomposites CoPt-x/Diatomite-C as oxygen reversible electrocatalysts for zinc-air batteries: Diatomite boosted the catalytic activity and durability

Wang, Kai; Tang, Zhenghua; Wu, Wen Chung; Xi, Pinxian; Liu, Dong; Ding, Zhaoqing; Chen, Xiaoning; Wu, Xiao; Chen, Shaowei

doi:10.1016/j.electacta.2018.07.154

Cited by 27 publications

(17 citation statements)

References 52 publications

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“…of peaks at 32.9°, 44.6°, 50.3°,59.6°, 61.5°, and 69.1° for Ni 0.2 Co 0.8 Se are in good accordance with the standard card of NiCoSe 2 (JCPDS No. 70-2851), and these Bragg reflections can be assigned to the crystal phases of (101), (102), (110), (103), (201), and (202), respectively[39,41,49].…”

supporting

confidence: 79%

Hollow Nanocages of NixCo1−xSe for Efficient Zinc–Air Batteries and Overall Water Splitting

Qian

Chen²,

Tang³

et al. 2019

Nano-Micro Lett.

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HIGHLIGHTS • A facile strategy for fabricating Ni x Co 1−x Se hollow nanocages was developed, and the formation mechanism was well explained. • Ni 0.2 Co 0.8 Se outperformed a Pt/C + RuO 2 catalyst in rechargeable and all-solid-state Zn-air battery tests, as well as in overall water splitting. • The hydrogen adsorption onto Ni x Co 1−x Se was simulated, and Gibbs free energies were calculated.

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supporting

confidence: 79%

Hollow Nanocages of NixCo1−xSe for Efficient Zinc–Air Batteries and Overall Water Splitting

Qian

Chen²,

Tang³

et al. 2019

Nano-Micro Lett.

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“…The Co 2p spectrum of PtCo/C (Figure 4 g) can be deconvoluted into eight individual peaks assigned to Co 0 , CoO x and the corresponding satellites, respectively [38, 39] . Thus, the Co 0 binding energies (including 2p 1/2 and 2p 3/2 ) of the catalyst shift to higher level in contrast to those reported in literatures, indicating the electron transfer from Co atoms to Pt atoms [40] . Besides, little oxides and hydroxides of Co (that is, CoO, Co 3 O 4 , or Co(OH) 2 ) is detected on the surface of the catalysts, may resulting from cyanuric acid chelated on surface.…”

Section: Resultscontrasting

confidence: 68%

Tailored Catalytic Nanoframes from Metal–Organic Frameworks by Anisotropic Surface Modification and Etching for the Hydrogen Evolution Reaction

et al. 2021

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A facile anisotropic surface modification and etching strategy is presented for the synthesis of hollow structured ZIF‐67 nanoframes. The strategy uses structural and compositional distinctions between each crystallographic facet of truncated rhombic dodecahedrons ZIF‐67 (tZIF‐67 RDs) and the moderate coordinating and etching effects of cyanuric acid (CA). The CA can anisotropically modify and protect the {110} facets from etching, causing the six {100} facets be selectively etched via an inside‐out manner, and finally forming the hollow nanoframes. The surface‐modified hollow tZIF‐67 RDs can be facet‐selectively etched by metal salts in an outside‐in manner to give metal‐doped tZIF‐67 nanoframes. After calcination, the metal‐tZIF‐67 hybrids are converted into metal‐Co alloy/C composite catalysts with hollow nanoframed structures. The PtCo/C catalyst with only 5.9 wt % Pt exhibits high catalytic activities and stabilities in the hydrogen evolution reaction (HER) in acidic solutions.

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“…Owing to an excellent ORR and OER performance of the Fe/N‐G, the self‐assembly rechargeable ZABs were used to test the practical application of the Fe/N‐G. As shown in Figure a, the schematic diagram of the rechargeable ZABs exhibits the zinc plate as the anode and the prepared catalysts as the air‐cathode, 6 m KOH plus 0.2 m ZnAc as the electrolyte . In addition, two series‐connected liquid ZABs with the Fe/N‐G air‐electrode could make the white light‐emitting diode (LED, ≈3.0 V) glow virtually for 12 h (Figure b).…”

Section: Resultsmentioning

confidence: 99%

Vertical‐Space‐Limit Synthesis of Bifunctional Fe, N‐Codoped 2D Multilayer Graphene Electrocatalysts for Zn‐Air Battery

et al. 2019

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Developing a green, cost‐efficient air‐cathode catalyst with high oxygen evolution and reduction reaction (OER/ORR) performance for rechargeable Zn‐air batteries (ZABs) has gained attention. Iron‐containing nitrogen‐doped graphene (Fe/N‐G) that contains Fe‐Nx coordination sites is prepared by pyrolyzing the complex of iron ion and PANI sheets intercalated with the unique layer gaps of H‐montmorillonite nanoreactors. The transmission electron microscopy (TEM), X‐ray diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS) analysis confirm that there are no crystalline materials, such as iron lattice, iron carbide, or iron nitride. The as‐prepared Fe/N‐G show a high electrocatalytic activity in ORR with a 4e− transfer process and the half‐wave potential of Fe/N‐G (0.877 V vs reversible hydrogen electrode—RHE), which is better than that of Pt/C in oxygen saturated 0.1 m KOH solution. In an acid electrolyte, the Fe/N‐G possesses a half‐wave potential similar to that of 20 wt% Pt/C. For OER, the Fe/N‐G exhibits the overpotential of 400 mV versus RHE at 10 mA cm−2. However, the Fe/N‐G as the air‐cathode of the homemade rechargeable ZABs exhibits a high power density (156.8 mW cm−2) and an excellent long discharge–charge cycling stability (787 cycles) at 20 mA cm−2. This work provides an inspiring guideline to prepare a high‐performance bifunctional air‐cathode for a rechargeable ZAB.

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Nanocomposites CoPt-x/Diatomite-C as oxygen reversible electrocatalysts for zinc-air batteries: Diatomite boosted the catalytic activity and durability

Cited by 27 publications

References 52 publications

Hollow Nanocages of NixCo1−xSe for Efficient Zinc–Air Batteries and Overall Water Splitting

Hollow Nanocages of NixCo1−xSe for Efficient Zinc–Air Batteries and Overall Water Splitting

Tailored Catalytic Nanoframes from Metal–Organic Frameworks by Anisotropic Surface Modification and Etching for the Hydrogen Evolution Reaction

Vertical‐Space‐Limit Synthesis of Bifunctional Fe, N‐Codoped 2D Multilayer Graphene Electrocatalysts for Zn‐Air Battery

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