The effect of P vacancies on the activity of cobalt phosphide nanorods as oxygen evolution electrocatalyst in alkali

Yuan, Guojun; Bai, Jianliang; Zhang, Lu; Chen, Xu; Ren, Lili

doi:10.1016/j.apcatb.2020.119693

Cited by 148 publications

(85 citation statements)

References 44 publications

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“…Thereby, the image just presents microscopic local architectural feature. The lattice fringe with 0.187 nm and 0.283 nm belongs to the interplanar spacing of (211) and (011) planes in CoP (Figure 3a) [33,37] . The SAED pattern of CoP@NPC demonstrates the (011), (200), (112), and (020) diffraction rings of CoP, echoing the aforementioned XRD results (Figure 3b–c).…”

Section: Resultssupporting

confidence: 60%

Stabilized Coralloid‐like CoP with N,P‐Codoped Carbon Shell on Carbon Paper for Enhanced Sodium Storage

Duan

et al. 2022

ChemElectroChem

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The electrode material made by conversion/alloying reaction possesses a high capacity but suffers from serious volumetric variation and pulverization during electrochemical storage cycling of sodium ions. Herein, we designed the coralloid-like CoP with N,P-codoped carbon shell on carbon paper derived from a metal-organic framework shell. The N,P-codoped carbon shell not only keeps the structural integrity of the nanomaterial but also introduces vacancies on the electrode material to provide abundant coordination of unsaturated sites for sodium storage. The optimized coralloid-like CoP with N,P-codoped carbon shell on carbon paper delivers a high reversible capacity of 318.9 mAh g À 1 at 200 mA g À 1 after 150 cycles. Even when the current density is 1000 mA g À 1 after 1000 cycles, it still maintains a high discharge capacity of 191.2 mAh g À 1 . The electrochemical analysis reveals self-standing hierarchical structure benefits to the chemical mass diffusion and electron conduction. This work provides a new strategy for the exploitation of advanced anode electrodes with a long life for sodium-ion batteries.

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Section: Resultssupporting

confidence: 60%

Stabilized Coralloid‐like CoP with N,P‐Codoped Carbon Shell on Carbon Paper for Enhanced Sodium Storage

Duan

et al. 2022

ChemElectroChem

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“…The interaction between Co and P atoms can also endow easier accession of reaction species H ads of the solution to the active surface sites and promote electron transfer more easily, which is greatly beneficial for HER performance [53] In addition, due to the existence of carbon-doped structure, the binding of CoP particles to carbon can effectively alleviate the volume expansion of CoP in the electrochemical reaction, inhibit the agglomeration of particles, and improve their electrical conductivity. [54,55] Thus, the presence of carbon doping help to improve the transmission ability of electronic, the electrocatalytic performance of CoP/C-120 is stronger than CoP-120.…”

Section: Discussionmentioning

confidence: 99%

A Simple Method for Preparing Carbon‐doped CoP to Enhance Hydrogen Evolution Reaction

et al. 2021

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Exploring low cost, highly active catalysts toward electrocatalytic hydrogen evolution reaction has become a research hotspot for researchers. In this regard, the precursor of CoP was obtained by hydrothermal method, and CoP was obtained by phosphating after treatment in different atmospheres. Among them, the final sample obtained by nitrogen treatment is CoP/ C. The carbon doping structure can promote electron transfer from CoP and improve the performance of the electrolytic water hydrogen evolution reaction. The results show that the HER properties of the samples with carbon-doped structure prepared at 120°C and 150°C in 0.5 M H 2 SO 4 solution are significantly better than those of the samples without such structure. Meanwhile, CoP/C-120 has a relatively lower overpotential (286 mV at 10 mA cm À 2 ) and good stability in 100000 s. And the reason of the high activity of this catalyst was also discussed through TEM and XPS characterization. The present study provides a promising avenue toward the design of carbon atom doped catalysts.

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“…[ 17–19 ] It is reported that doped phosphorus to produce transition metal phosphates (TMPs) can further adjust the structure and enhance their intrinsic catalytic activity. [ 20–23 ] For example, Ren’ group synthesized a Ni 2 P–Fe 2 P microsheet by soaking Ni foam in hydrochloric acid and an iron nitrate solution and then phosphidation, the obtained catalyst exhibited a superb water‐splitting performance. [ 24 ] Li et al prepared a Co 2 P@NPC (Co 2 P nanocores encapsulated in N,P‐doped carbon) catalyst and this catalyst exhibits good OER performances in alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

NiCoFeP Nanofibers as an Efficient Electrocatalyst for Oxygen Evolution Reaction and Zinc–Air Batteries

Bian

Sun

2021

Adv Energy and Sustain Res

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The development of high‐performance and low‐cost bifunctional electrocatalysts is still challenging for solving current energy and environmental problems. However, most electrocatalysts require complex synthesis processes, which prohibit mass production. Herein, NiCoFeP nanofibers are synthesized by phosphating the electrospun Ni,Co precursor nanofibers and subsequent displacement reaction of Ni and Fe3+ via impregnation of Fe(NO3)3 solution. The obtained NiCoFeP nanofibers catalyst possesses high intrinsic activity, abundant active sites, and superior kinetics, which shows excellent oxygen evolution reaction (OER) performance with low overpotential of 0.309 V at 50 mA cm−2 in 1 m KOH solution. It also exhibits a long‐term cycling performance for 200 h at 10 mA cm−2 as the cathode for zinc–air battery. Furthermore, it is demonstrated that this displacement reaction method is also suitable for preparing other catalysts NiMnP and NiCuP to enhance their OER performance. This work presents a novel approach for the fabrication of multimetallic catalysts for electrocatalysis.

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The effect of P vacancies on the activity of cobalt phosphide nanorods as oxygen evolution electrocatalyst in alkali

Cited by 148 publications

References 44 publications

Stabilized Coralloid‐like CoP with N,P‐Codoped Carbon Shell on Carbon Paper for Enhanced Sodium Storage

Stabilized Coralloid‐like CoP with N,P‐Codoped Carbon Shell on Carbon Paper for Enhanced Sodium Storage

A Simple Method for Preparing Carbon‐doped CoP to Enhance Hydrogen Evolution Reaction

NiCoFeP Nanofibers as an Efficient Electrocatalyst for Oxygen Evolution Reaction and Zinc–Air Batteries

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