Hollow CoP microspheres as superior bifunctional electrocatalysts for hydrogen evolution in a broad pH range and oxygen evolution reactions

Ma, Ruining; Hao, Ruonan; Zhou, Wanyong; Cao, Ye; Chai, Hui

doi:10.1016/j.jssc.2022.123499

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…The excellent inheritance of the morphology and porosity of the MOF precursors helped CoSe 2 @NC (355.2 m 2 g −1 ) and CoSe 2 @C (129.3 m 2 g −1 ) provide higher BET surface areas than that of CoSe 2 (38.7 m 2 g −1 ), as shown in Figure S3. This had beneficial effects on CoSe 2 @NC in electron/mass transfer [37][38][39]. TEM and HR-TEM analyses were performed to analyze the morphology of the material further.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Huu

Cho

et al. 2023

International Journal of Energy Research

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The growth of stable and efficient catalysts is vital for the electrochemical hydrogen evolution reaction (HER). Metal–organic frameworks (MOFs) have been recognized as ideal templates for fabricating efficient nanomaterial-based electrocatalysts for the HER. In this study, nitrogen-containing Co-MOF (ZIF-67), Co-MOF-74, and cobalt chloride salt were selenized to create various cobalt-selenide-based materials, i.e., cobalt selenide@nitrogen-doped carbon (CoSe2@NC), CoSe2@C, and CoSe2, respectively. The core–shell structure of CoSe2@NC originated from ZIF-67 exhibited better HER catalytic activity than those of CoSe2@C and CoSe2. CoSe2@NC exhibited a low overvoltage of 184 mV at 10 mA cm−2 and a small Tafel slope of 58.4 mV dec−1. In addition, this catalyst exhibited excellent durability while maintaining its performance after 12 h of testing. The high catalytic activity is ascribed to the integrated effect of the core–shell architecture, N-doped carbon, and large surface area, making protected active sites, high conductivity, and exposed active sites possible. The results demonstrate the efficiency of using MOFs as precursors for cobalt selenide fabrication and provide a potential synthetic strategy for noble-metal-free electrocatalysts for hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Huu

Cho

et al. 2023

International Journal of Energy Research

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“…Furthermore, optimizing the electronic structure of transition-metal phosphates can accelerate the kinetics of electrolytic water spilling for HER. 23,24 For instance, Chen et al 25 developed iron-doped cobalt phosphide nanoparticle-decorated porous carbon nanofibers (Fe-CoP/PCNF) for HER, achieving a low overvoltage of 151 mV (j = 10) in 0.5 M H 2 SO 4 . Similarly, Yang et al 26 investigated iron-doped cobalt phosphide one-dimensional (1D) hollow nanoneedles on CC (Fe-CoP/CC) toward HER, with an overvoltage of 80 mV (j = 10) in 0.5 M H 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

“…In summary, a porous structure is a crucial technical approach for enhancing the intrinsic catalytic performance of catalysts, primarily because it can expose more catalytic active sites, facilitate the penetration of electrolyte solutions onto the catalyst surface, and allow for the escape of generated gases. Furthermore, optimizing the electronic structure of transition-metal phosphates can accelerate the kinetics of electrolytic water spilling for HER. , For instance, Chen et al developed iron-doped cobalt phosphide nanoparticle-decorated porous carbon nanofibers (Fe-CoP/PCNF) for HER, achieving a low overvoltage of 151 mV ( j = 10) in 0.5 M H 2 SO 4 . Similarly, Yang et al investigated iron-doped cobalt phosphide one-dimensional (1D) hollow nanoneedles on CC (Fe-CoP/CC) toward HER, with an overvoltage of 80 mV ( j = 10) in 0.5 M H 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

N-Doped FeP₄ Nanoparticles on Carbon Cloth as Catalysts for Electrolytic Hydrogen Evolution

Meng,

Zhu,

Shi

et al. 2024

ACS Appl. Nano Mater.

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Theoretically, the stronger electronegativity of N compared to that of P suggests that N-doped FeP 4 could reduce the adsorption energy of hydrogen, potentially enhancing the kinetics of the hydrogen evolution reaction (HER) and improving its electrochemical characteristics. Experimentally, a three-dimensional (3D) porous dodecahedron N-doped FeP 4 nanoparticle array catalyst developed on carbon cloth (CC) was investigated. The synthesized N-doped FeP 4 /CC nanoparticle electrocatalysts demonstrated satisfactory HER performance. These electrocatalysts showed a current density (J) of 10 mA/cm −2 at an overvoltage of 87 mV in a 0.5 M H 2 SO 4 solution, indicating that the electronically modified FeP 4 (N-FeP 4 /CC) catalyst exhibited superior HER activity. Additionally, the overpotential for the N-doped FeP 4 /CC nanoparticle catalyst was 347 mV for HER in simulated seawater solution (0.5 M H 2 SO 4 + 0.5 M NaCl), demonstrating the exceptional catalytic activity of the N-doped FeP 4 /CC nanoparticle catalyst. Density functional theory (DFT) calculations showed that N doping could synergistically improve the Gibbs free energy of hydrogen adsorption (ΔGH*) of FeP 4 (−0.29 eV), which was lower than that of undoped FeP 4 (0.41 eV). This supports the theoretical proposition that modifying the electronic structure can enhance the electrolysis hydrodynamics and catalytic performance, aligning with experimental findings. This study may provide a strategy for optimizing the electronic structure of seawater splitting.

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Kirkendall effect induced the formation of hollow Co2P in Co-N-C for ORR, OER, HER and flexible Zn–Air battery

Liu,

Yan,

Song

et al. 2024

Chemical Engineering Journal

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Hollow CoP microspheres as superior bifunctional electrocatalysts for hydrogen evolution in a broad pH range and oxygen evolution reactions

Cited by 5 publications

References 34 publications

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

N-Doped FeP₄ Nanoparticles on Carbon Cloth as Catalysts for Electrolytic Hydrogen Evolution

Kirkendall effect induced the formation of hollow Co2P in Co-N-C for ORR, OER, HER and flexible Zn–Air battery

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Hollow CoP microspheres as superior bifunctional electrocatalysts for hydrogen evolution in a broad pH range and oxygen evolution reactions

Cited by 5 publications

References 34 publications

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

Comparative Study on Hydrogen Evolution Reaction of Various Cobalt-Selenide-Based Electrocatalysts

N-Doped FeP4 Nanoparticles on Carbon Cloth as Catalysts for Electrolytic Hydrogen Evolution

Kirkendall effect induced the formation of hollow Co2P in Co-N-C for ORR, OER, HER and flexible Zn–Air battery

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N-Doped FeP₄ Nanoparticles on Carbon Cloth as Catalysts for Electrolytic Hydrogen Evolution