Co2P/CoP heterostructures with significantly enhanced performance in electrocatalytic hydrogen evolution reaction: Synthesis and electron redistribution mechanism

Liu, Baoshan; Zhong, Boan; Li, Feng; Liu, Jing; Zhao, Liping; Zhang, Peng; Gao, Lian

doi:10.1007/s12274-023-6228-3

Nano Res.

2023

DOI: 10.1007/s12274-023-6228-3

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Co2P/CoP heterostructures with significantly enhanced performance in electrocatalytic hydrogen evolution reaction: Synthesis and electron redistribution mechanism

Baoshan Liu,

Boan Zhong,

Feng Li

et al.

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Cited by 18 publications

References 66 publications

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Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Hao,

Liu,

Zuo

et al. 2024

Adv Funct Materials

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Uncontrollable dendrite growth significantly hinders the application of Li metal anodes. To improve the uniformity of Li deposition, it is essential to develop an inorganic‐rich solid‐electrolyte interphase (SEI) and lithiophilic host surface. However, there exists a big challenge in simultaneously optimizing SEI and anode surface. Herein, the cobalt phosphide/dicobalt phosphide (CoP/Co2P) pp‐heterojunction modified carbon nanofiber networks (CNF‐CoPx) are successfully prepared as 3D Li host, which can form built‐in electric field (BIEF) to accelerate the conversion reaction kinetics of CoP into Li3P, and spontaneously derive into a new BIEF induced by the Co/Co2P Schottky heterojunction facilitates the electron transfer during Li deposition process. Consequently, the CNF‐CoPx@Li symmetric cell exhibits impressive long‐term cycling stability, maintaining low polarization for up to 600 h at a current density of 3 mA cm−2. Additionally, the CNF‐CoPx@Li||LiFePO4 full cell delivers a high‐capacity retention of 89.5% over 500 cycles at 1 C.

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Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Hao,

Liu,

Zuo

et al. 2024

Adv Funct Materials

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Constructing CoP/Ni₂P Heterostructure Confined Ru Sub‐Nanoclusters for Enhanced Water Splitting in Wide pH Conditions

Zhang,

Liu,

et al. 2024

Advanced Science

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Developing efficient electrocatalysts for water splitting is of great significance for realizing sustainable energy conversion. In this work, Ru sub‐nanoclusters anchored on cobalt‐nickel bimetallic phosphides (Ru‐CoP/Ni2P) are constructed by an interfacial confinement strategy. Remarkably, Ru‐CoP/Ni2P with low noble metal loading (33.1 µg cm−2) shows superior activity for hydrogen evolution reaction (HER) in all pH values, whose turnover frequency (TOF) is 8.7, 15.3, and 124.7 times higher than that of Pt/C in acidic, alkaline, and neutral conditions, respectively. Meanwhile, it only requires the overpotential of 171 mV@10 mA cm−2 for oxygen evolution reaction (OER) and corresponding TOF is 20.3 times higher than that of RuO2. More importantly, the Ru‐CoP/Ni2P||Ru‐CoP/Ni2P displays superior mass activity of 4017 mA mgnoble metal−1 at 2.0 V in flowing alkaline water electrolyzer, which is 105.1 times higher than that of Pt/C||IrO2. In situ Raman spectroscopy demonstrates that the Ru sites in Ru‐CoP/Ni2P play a key role for water splitting and follow the adsorption evolution mechanism toward OER. Further mechanism studies disclose the confined Ru atom contributes to the desorption of H2 during HER and the formation of O‐O bond during OER, leading to fast reaction kinetics. This study emphasizes the importance of interface confinement for enhancing electrocatalytic activity.

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Self‐Reconstructed Amorphous CoO_x/NiCoB Heterostructure Catalysts for Enhanced HER Performance

Lu,

Wang,

Huang

et al. 2024

Small

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Amorphous electrocatalysts exhibit potentials as precursors for triggering the in situ reconstruction to generate the real catalytic active species toward electrochemical processes. In this work, a new kind of amorphous Ni‐Co‐B alloy pre‐catalysts for hydrogen evolution reaction (HER) is reported, which is obtained via a facile electroless plating strategy on the nickel foam (NF). Interestingly, X‐ray photoelectron spectroscopy, X‐ray absorption spectroscopy and morphological characterizations identify the in situ reconstruction process during HER accompanied by the preferential leaching of surface B species and the formation of amorphous CoOx nanosheet arrays as the real active sites. Benefiting from the synergistic effect between the surface CoOx layer and the inner unaltered NiCoB phase, the resultant CoOx/NiCoB heterostructure catalyst achieves a low overpotential of 209 mV at the elevated current density of 500 mA cm−2 and maintains stability for 300 h without significant attenuation. Theoretical calculation reveals the electron reconfiguration at the interfaces between the newly formed CoOx and inner NiCoB phases, which is favorable for the stabilization of reconstructed active oxide layers at the reductive potentials for catalyzing HER. Moreover, the CoOx/NiCoB heterostructure optimizes hydrogen adsorption free energies, thereby enhancing HER catalytic activity.

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Co2P/CoP heterostructures with significantly enhanced performance in electrocatalytic hydrogen evolution reaction: Synthesis and electron redistribution mechanism

Cited by 18 publications

References 66 publications

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Constructing CoP/Ni₂P Heterostructure Confined Ru Sub‐Nanoclusters for Enhanced Water Splitting in Wide pH Conditions

Self‐Reconstructed Amorphous CoO_x/NiCoB Heterostructure Catalysts for Enhanced HER Performance

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Co2P/CoP heterostructures with significantly enhanced performance in electrocatalytic hydrogen evolution reaction: Synthesis and electron redistribution mechanism

Cited by 18 publications

References 66 publications

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co2P Heterojunction in 3D Carbon Nanofiber Networks

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co2P Heterojunction in 3D Carbon Nanofiber Networks

Constructing CoP/Ni2P Heterostructure Confined Ru Sub‐Nanoclusters for Enhanced Water Splitting in Wide pH Conditions

Self‐Reconstructed Amorphous CoOx/NiCoB Heterostructure Catalysts for Enhanced HER Performance

Contact Info

Product

Resources

About

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co₂P Heterojunction in 3D Carbon Nanofiber Networks

Constructing CoP/Ni₂P Heterostructure Confined Ru Sub‐Nanoclusters for Enhanced Water Splitting in Wide pH Conditions

Self‐Reconstructed Amorphous CoO_x/NiCoB Heterostructure Catalysts for Enhanced HER Performance