Highly efficient overall-water splitting enabled via grafting boron-inserted Fe-Ni solid solution nanosheets onto unconventional skeleton

Hao, Weiju; Yao, Dongxue; Xu, Qi; Wang, Ruirui; Zhang, Chenglong; Guo, Yanhui; Sun, Ruimin; Huang, Mingxian; Chen, Ziliang

doi:10.1016/j.apcatb.2021.120188

Cited by 54 publications

(29 citation statements)

References 48 publications

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“…Meanwhile, BH 4 − ions may decompose on the surface of Bi nanocrystals to produce B atoms [ 24 ]. At this point, B atoms were diffused and successfully inserted into the interstitials of host Bi layered crystal structure [ 31 – 33 ]. For comparison, Bi-H sample was synthesized using hydrazine as the reducing agent to exclude any B doping (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Fig. 2 a, the X-ray photoelectron spectroscopy (XPS) spectrum of B 1 s located at the binding energy of 191.6 and 187.9 eV can be assigned to the metal-B bond and surface oxidized B, respectively [ 31 , 37 , 43 ]. Moreover, the relative concentration of meal-B in the XPS profiles increases with Ar + etching time (Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Boron Dopant Tuned Morphology and Electronic State Of Bi Catalystmentioning

confidence: 99%

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Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Feng

et al. 2021

Nano-Micro Lett.

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Electrochemical reduction of CO2 to formate is economically attractive but improving the reaction selectivity and activity remains challenging. Herein, we introduce boron (B) atoms to modify the local electronic structure of bismuth with positive valence sites for boosting conversion of CO2 into formate with high activity and selectivity in a wide potential window. By combining experimental and computational investigations, our study indicates that B dopant differentiates the proton participations of rate-determining steps in CO2 reduction and in the competing hydrogen evolution. By comparing the experimental observations with the density functional theory, the dominant mechanistic pathway of B promoted formate generation and the B concentration modulated effects on the catalytic property of Bi are unravelled. This comprehensive study offers deep mechanistic insights into the reaction pathway at an atomic and molecular level and provides an effective strategy for the rational design of highly active and selective electrocatalysts for efficient CO2 conversion.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Feng

et al. 2021

Nano-Micro Lett.

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“…[11] Within this context, seeking into a satisfactory catalyst with high catalytic efficiency, stability and low cost for water splitting is crucial for the large-scale hydrogen production. [12] In recent years, transition-metal sulfides, phosphides, carbides, nitrides, oxides, borides, and selenides have been extensively investigated as electrocatalysts for HER or OER. [13][14][15][16][17][18] Among them, transition metal-based sulfides are of particular interest owing to the bifunctional catalytic nature.…”

Section: Introductionmentioning

confidence: 99%

Local Photothermal Effect Enabling Ni₃Bi₂S₂ Nanoarray Efficient Water Electrolysis at Large Current Density

Yao

Hao

Weng

et al. 2022

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In terms of the large‐scale hydrogen production by water electrolysis, achieving the bifunctional electrocatalyst with high efficiency and stability at high current densities is of great significance but still remains a grand challenge. To address this issue, herein, one unique hybrid electrode is synthesized with the local photothermal effect (LPTE) by supporting the novel ternary nickel (Ni)bismuth (Bi)sulfur (S) nanosheet arrays onto nickel foam (Ni3Bi2S2@NF) via a one‐pot hydrothermal reaction. The combined experimental and theoretical observations reveal that owing to the intrinsic LPTE action of Bi, robust phase stability of Ni3Bi2S2 as well as the synergistic effect with hierarchical configuration, upon injecting the light, the as‐prepared Ni3Bi2S2 exhibits remarkably improved efficiency of 44% and 35% for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Such enhanced values are also comparable to those performed in working media heated to 80 °C. In addition, the overall water splitting system by using Ni3Bi2S2@NF as bifunctional electrodes only delivers an ultralow voltage of 1.40 V at 10 mA cm−2 under LPTE, and can be stable more than 36 h at 500–1000 mA cm−2. More broadly, even worked at 0–5 °C, alkaline simulated seawater and high salt seawater, the electrodes still show apparent LPTE effect for improving catalytic efficiency.

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“…In order to solve these problems, mounting the active material on the collector as a selfsupporting electrode is an effective strategy. 9,10 Currently, industrial-scale water electrolysers utilize nickel mesh electrodes, which, at almost twice the price, are characterized by relatively low catalytic activity and just a quarter of the electrical conductivity of copper, resulting in high resistance at high current densities. Recently, significant effort has been made to develop materials possessing high stability, catalytic activity and electrical conductivity to replace or improve nickel electrodes for water electrolyzers.…”

Section: Introductionmentioning

confidence: 99%

Copper mesh supported nickel nanowire array as a catalyst for the hydrogen evolution reaction in high current density water electrolysis

Gao

Wang

et al. 2022

Dalton Trans.

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Highly efficient overall-water splitting enabled via grafting boron-inserted Fe-Ni solid solution nanosheets onto unconventional skeleton

Cited by 54 publications

References 48 publications

Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Local Photothermal Effect Enabling Ni₃Bi₂S₂ Nanoarray Efficient Water Electrolysis at Large Current Density

Copper mesh supported nickel nanowire array as a catalyst for the hydrogen evolution reaction in high current density water electrolysis

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Highly efficient overall-water splitting enabled via grafting boron-inserted Fe-Ni solid solution nanosheets onto unconventional skeleton

Cited by 54 publications

References 48 publications

Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Regulating the Electron Localization of Metallic Bismuth for Boosting CO2 Electroreduction

Local Photothermal Effect Enabling Ni3Bi2S2 Nanoarray Efficient Water Electrolysis at Large Current Density

Copper mesh supported nickel nanowire array as a catalyst for the hydrogen evolution reaction in high current density water electrolysis

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Local Photothermal Effect Enabling Ni₃Bi₂S₂ Nanoarray Efficient Water Electrolysis at Large Current Density