High hydrogen evolution performance of Al doped CoP3 nanowires arrays with high stability in acid solution superior to Pt/C

Duan, Zhuojun; Pi, Mingyu; Zhang, Dingke; Zhang, Peng; Deng, Jianqiang; Chen, Shijian

doi:10.1016/j.ijhydene.2019.02.095

“…The binding energy of Co 2p1/2 and Co 2p3/2 related to Co is consistent with those reported in the literature studies. 38,39 In addition, NCP(1:1) has the lowest energy state of the Co 2p3/2 peak (778.70 eV), which is closest to the electronic state of pure metal Co (778.20 eV). 40 In contrast, the Co energy states of CoP 3 (780.60 eV), NCP(1:2) (779.85 eV), and NCP(2:1) (780.00 eV) are, respectively, 2.40, 1.65, and 1.80 eV higher than that of NCP(1:1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Interface Engineering of CoP₃/Ni₂P for Boosting the Wide pH Range Water-Splitting Activity

Zhang

¹

,

Zhou

²

,

Liu

³

et al. 2021

ACS Appl. Mater. Interfaces

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Developing electrocatalysts with low price, high energy efficiency, and universal pH value for hydrogen/oxygen evolution reaction (HER and OER) is very important for the wide application of electrochemical water splitting in hydrogen production. The results of density functional theory show that the interface region of CoP3/Ni2P heterostructures can significantly boost all of the catalytic performances. High-resolution transmission electron microscopy and X-ray photoelectron spectroscopy were used to confirm the abundant structural defects and the corresponding adjustment of the electronic state, thus ameliorating the activation energy, conductivity, and active area of the catalyst. Benefiting from these, CoP3/Ni2P heterostructures exhibit superior performance of both HER and OER in a wide pH range. CoP3/Ni2P can also be used for water splitting (1.557 V at 10 mA cm–2) more than 40 h, superior to benchmark pairs of Pt/C and RuO2 on Ni foam.

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“…However, the HER performance (under laboratory conditions) can be seen as competitive to recently-developed electrocatalysts [26,27] as well as commercially available ones. [28,29] For example, Popczun et al [27] recently reported that nano-scaled Ni 2 P exhibited highly-active and stable electrocatalytically initiated hydrogen evolution. In their conditions, Ni 2 P nanoparticles were synthesized in high boiling organic solvent (1-octadecene, oleylamine, and tri-n-octylphosphine) and deposited on titanium foil with a catalyst (Ni 2 P) loading of 10 mg mm À2 .…”

Section: Ultrasonic Conditionsmentioning

confidence: 99%

“…The Pt loading (ca. 18 mg mm À2 ) is still below the lower limit compared to the loading of some commercially available electrodes [28,29,56] as Pt and Ir loadings in state-of-the art electrolyzers are in the range of 2-5 mg cm À2 . For instance the loading for platinum black coated Nafion 115 from FuelCellsEtc used as cathode for PEMWE type electrolyzers amounts to 30 mg mm À2 .…”

Section: Samplementioning

confidence: 99%

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

Ring

¹

,

Pollet

²

,

Chatenet

³

et al. 2019

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The electrodeposition of noble metals using corresponding dissolved metal salts represents an interesting process for the improvement of the electrocatalytic hydrogen evolution reaction (HER) properties of less active substrate materials. The fact that only a small fraction of the dissolved noble metals reaches the substrate represents a serious obstacle to this common procedure. We therefore chose a different path. It was found that the HER activity of Ni42 alloy drastically increased (η=140 mV at j=10 mA cm−2; pH 1) when a platinum counter electrode was used during polarization experiments in acid. This improvement was caused by a platinum transfer from the platinum anode to the steel cathode, a process which occurred simultaneously to the hydrogen evolution. The negligible accumulation of Pt (26 μg) in the electrolyte turns this straight‐forward transfer procedure into a highly cost‐effective, environmentally friendly, and waste reducing approach for the generation of cheap, stable and effective HER electrodes.

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“…We claim that the differences in Tafel slopes are due to different physicochemical properties of the surfaces (for example, hydrophobicity, porosity) which influence bubble adhesion/detachment. However, the HER performance (under laboratory conditions) can be seen as competitive to recently‐developed electrocatalysts as well as commercially available ones . For example, Popczun et al .…”

Section: Resultsmentioning

confidence: 99%

“…The Pt loading (ca. 18 μg mm −2 ) is still below the lower limit compared to the loading of some commercially available electrodes as Pt and Ir loadings in state‐of‐the art electrolyzers are in the range of 2–5 mg cm −2 . For instance the loading for platinum black coated Nafion 115 from FuelCellsEtc used as cathode for PEMWE type electrolyzers amounts to 30 μg mm −2 .…”

Section: Resultsmentioning

confidence: 99%

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

Ring

¹

,

Pollet

²

,

Chatenet

³

et al. 2019

View full text Add to dashboard Cite

The electrodeposition of noble metals using corresponding dissolved metal salts represents an interesting process for the improvement of the electrocatalytic hydrogen evolution reaction (HER) properties of less active substrate materials. The fact that only a small fraction of the dissolved noble metals reaches the substrate represents a serious obstacle to this common procedure. We therefore chose a different path. It was found that the HER activity of Ni42 alloy drastically increased (η=140 mV at j=10 mA cm−2; pH 1) when a platinum counter electrode was used during polarization experiments in acid. This improvement was caused by a platinum transfer from the platinum anode to the steel cathode, a process which occurred simultaneously to the hydrogen evolution. The negligible accumulation of Pt (26 μg) in the electrolyte turns this straight‐forward transfer procedure into a highly cost‐effective, environmentally friendly, and waste reducing approach for the generation of cheap, stable and effective HER electrodes.

show abstract

High hydrogen evolution performance of Al doped CoP3 nanowires arrays with high stability in acid solution superior to Pt/C

Cited by 24 publications

References 50 publications

Interface Engineering of CoP₃/Ni₂P for Boosting the Wide pH Range Water-Splitting Activity

Interface Engineering of CoP₃/Ni₂P for Boosting the Wide pH Range Water-Splitting Activity

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

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High hydrogen evolution performance of Al doped CoP3 nanowires arrays with high stability in acid solution superior to Pt/C

Cited by 24 publications

References 50 publications

Interface Engineering of CoP3/Ni2P for Boosting the Wide pH Range Water-Splitting Activity

Interface Engineering of CoP3/Ni2P for Boosting the Wide pH Range Water-Splitting Activity

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

From Bad Electrochemical Practices to an Environmental and Waste Reducing Approach for the Generation of Active Hydrogen Evolving Electrodes

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Product

Resources

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Interface Engineering of CoP₃/Ni₂P for Boosting the Wide pH Range Water-Splitting Activity

Interface Engineering of CoP₃/Ni₂P for Boosting the Wide pH Range Water-Splitting Activity