A high-performance oxygen evolution electrode of nanoporous Ni-based solid solution by simulating natural meteorites

Hao, Boya; Ye, Zhiguo; Xu, J.L.; Li, Liangliang; Huang, Juntong; Peng, Xuerong; Li, Duosheng; Jin, Zhong; Ma, Guiping

doi:10.1016/j.cej.2020.128340

Cited by 30 publications

(18 citation statements)

References 62 publications

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“…To verify this assumption, Figure a,b shows the HRTEM images of the NC6-FeCoNiMg electrode before and after electrochemical aging for 300 cycles in a 1 M KOH aqueous medium. As shown in Figure b, the surface structure of the NC6-FeCoNiMg electrode undergoes obvious rearrangement due to the formation of a metal (oxy)hydroxide layer of ∼5 nm thickness during the initial OER process, which is consistent with our previous results . The (oxy)hydroxide layer in the inner and outer surfaces of the NC6-FeCoNiMg electrode also possesses more unsaturated active sites and defects compared to the pristine one, promoting the electron transfer of the OER. , All in all, long-term stability and excellent electrocatalytic activity of the nanoporous NC6-FeCoNiMg electrode are competitive with those of the reported electrocatalysts for the OER in an alkaline medium (see Table S6).…”

Section: Resultssupporting

confidence: 89%

“…The main reason should be the formation of the pyridinic N and graphitic N on the alloy surface, improving the electron transfer and resulting in high conductivity for the electrode. It is also discovered that the FeCoNiMg alloy samples have a pre-OER oxidation peak in the potential range of 1.35–1.45 V (vs RHE), which is mainly derived from the surface oxidation of metals into a metal (oxy)hydroxide layer. − …”

Section: Resultsmentioning

confidence: 90%

“…The IrO 2 / Ni foam electrode as a control sample was prepared by the method of thermal decomposition described in our previous study. 53 Preparation of the Nanoporous FeCoNiMg Alloy. Briefly, Co, Fe, and Ni powders were mixed in a mole ratio of 1:3:5, and spherical Mg powder (75 μm, 10 wt % total mass) was used as the pore-making agent.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Huang

Feng²,

et al. 2022

ACS Appl. Mater. Interfaces

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The kinetics of the oxygen evolution reaction (OER) in aqueous electrolytes is relatively slow, which seriously limits the energy efficiency of electricity-to-hydrogen conversion. Herein, a bicontinuous nanoporous FeCoNiMg alloy is prepared by high heat sintering method based on the nanoscale Kirkendall effect and the surface is codoped with nitrogen and carbon elements by the nitrocarburizing method (denoted NC-FeCoNiMg). The three-dimensional (3D) nanoporous NC-FeCoNiMg alloy electrode achieves superior electrocatalytic performance for the OER in alkaline media, delivering a low Tafel slope (34.6 mV dec −1 ) and small overpotentials (235 and 290 mV at 10 and 100 mA cm −2 , respectively). Under consecutive high current densities, the NC-FeCoNiMg electrode still exhibits excellent long-term stability, and the OER activity even increases after testing for 100 h at a high current density of 1000 mA cm −2 . Comprehensive studies reveal that the N/C codoping of the inner and outer surfaces dramatically improves the electrocatalytic activity of the NC-FeCoNiMg electrode. This work demonstrates an efficient nanoarchitectural construction and a surface modulation strategy to increase the electrocatalytic activity and stability of transitionmetal-based electrodes for the OER, holding great promise for fulfilling the requirements for the large-scale production of clean hydrogen energy.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 90%

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Huang

Feng²,

et al. 2022

ACS Appl. Mater. Interfaces

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“…As Ni/Fe-based electrodes exhibit good OER activity, while Ru-based electrodes are the common commercial HER electrocatalyst, thus, the related half reaction and the water splitting reaction are evaluated. Meanwhile, the commercial IrO 2 and Pt/C electrodes are also measured to compare the electrocatalytic ability. − The electrochemical OER catalytic activities of the NiF-SnS 2 /CC electrodes are examined. Figure a exhibits the iR -corrected linear sweep voltammetry (LSV) curves of various electrodes.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Coupling of SnS₂ Nanosheet Arrays with Ni/Fe Dual Metal and Ru Nanodots via a Cation Exchange Strategy for Overall Water Splitting

Deng

Liu

et al. 2021

Ind. Eng. Chem. Res.

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The application of tin disulfide (SnS2) in electrochemical water splitting remains a challenging issue on account of its unsatisfactory intrinsic electron conductivity and electrocatalytic activity. In this work, the vertically aligned SnS2 nanosheet arrays with open porous mass transfer pathways are synthesized, while the rational surface modification of highly electrocatalytic active heteroatoms (Ni/Fe or Ru) onto the SnS2 surface is achieved by a cation exchange strategy. The as-prepared Ni/Fe dual-metal-doped SnS2 on carbon cloth (NiFe-SnS2/CC) with abundant S vacancies and Ru nanodots-modified SnS2 (Ru-SnS2/CC) with SnS2/SnS heterostructures can effectively enhance the electron conductivity and the electrocatalytic activity. Benefiting from the plenty of metal heteroatoms and defects, the onset overpotential of the NiFe-SnS2/CC composite is only 251 mV for oxygen evolution reaction, while the value of Ru-SnS2/CC is 81 mV for hydrogen evolution reaction, along with robust long-term durability. Moreover, the assembled NiFe-SnS2/CC-3||Ru-SnS2/CC-10 electrolyzer device can attain a low cell voltage of 1.576 V at 10 mA cm–2. This project provides the methodology for promoting the low electrocatalytic species for high-performance energy conversion as well as a rational surface modification strategy through a cation exchange reaction.

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“…Due to the extensive exploitation and utilization of fossil fuels, the nonrenewable resources are being gradually consumed and the environment is also severely damaged. − As an environmentally friendly and renewable energy source, hydrogen with high energy density is considered as one of the most potent alternative energies. − Among various hydrogen production strategies, water electrolysis coupled with renewable electric supplies has been extensively studied because of its high-purity product and nonpollution nature . The water electrolysis reaction includes the hydrogen evolution reaction (HER, produce H 2 )/oxygen evolution reaction (OER, produce O 2 ) on the cathode/anode .…”

Section: Introductionmentioning

confidence: 99%

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

Zhao

Liu

Deng

et al. 2021

Ind. Eng. Chem. Res.

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The intrinsic catalytic activity of cost-effective non-noble transition-metal-based electrocatalysts greatly limits their overall water splitting efficiency. In this work, Mo-/Ni-/Fe-based ternary transition-metal composites are uniformly anchored on the hierarchical nitrogen-doped carbon nanotubes (N-CNTs)/carbon cloth (CC) via a one-pot hydrothermal process, followed by hydrogenation and sulfurization to obtain the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalysts, respectively. The rationally designed hybrids with various crystalline structures, heteroatom dopants, and large accessible surface areas can form abundant heterojunction interfaces and rich active defects to adjust the local electronic structure and intrinsic electrocatalytic capability. Therefore, the H-MoNiFe/N-CNTs-2 electrode reveals a low OER overpotential of 259.0 mV at 50 mA cm −2 and a small Tafel slope of 44.3 mV dec −1 , while the S-MoNiFe/N-CNTs-1 electrode exhibits a good HER overpotential of 130.7 mV at 10 mA cm −2 . Moreover, the electrolysis device exhibits a low cell voltage of 1.58 V at 10 mA cm −2 and maintains excellent catalytic activity under a high current for 12 h. This work provides a simple but rational composite electrode construction strategy with broad application prospects for electrocatalytic reactions.

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A high-performance oxygen evolution electrode of nanoporous Ni-based solid solution by simulating natural meteorites

Cited by 30 publications

References 62 publications

Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Synergistic Coupling of SnS₂ Nanosheet Arrays with Ni/Fe Dual Metal and Ru Nanodots via a Cation Exchange Strategy for Overall Water Splitting

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

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A high-performance oxygen evolution electrode of nanoporous Ni-based solid solution by simulating natural meteorites

Cited by 30 publications

References 62 publications

Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Bicontinuous Nanoporous Nitrogen/Carbon-Codoped FeCoNiMg Alloy as a High-Performance Electrode for the Oxygen Evolution Reaction

Synergistic Coupling of SnS2 Nanosheet Arrays with Ni/Fe Dual Metal and Ru Nanodots via a Cation Exchange Strategy for Overall Water Splitting

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

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Synergistic Coupling of SnS₂ Nanosheet Arrays with Ni/Fe Dual Metal and Ru Nanodots via a Cation Exchange Strategy for Overall Water Splitting