Coupling Co2P and CoP nanoparticles with copper ions incorporated Co9S8 nanowire arrays for synergistically boosting hydrogen evolution reaction electrocatalysis

Jiang, Deli; Ma, Wanxia; Zhou, Yubin; Xing, Yingying; Quan, Biao; Li, Di

doi:10.1016/j.jcis.2019.04.080

Cited by 49 publications

(14 citation statements)

References 47 publications

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“…So, there is a huge challenge to elaborately design Co2P-based catalyst with outstanding ORR performance for ZABs. Recently, some studies reported that the doping of heteroatoms with different electronegativities is an available method to enhance the activity of carbon materials by tuning electronic properties and conductivity [20][21][22][23] . For example, Dai et al prepared vertically-arranged nitrogen-containing carbon nanotubes (VA-NCNTs) that exhibited highly efficient ORR activity.…”

Section: Introductionmentioning

confidence: 99%

Co<sub>2</sub>P@P-Doped 3D Porous Carbon for Bifunctional Oxygen Electrocatalysis

Xiao¹,

Pei²,

Hu³

et al. 2020

Acta Physico Chimica Sinica

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The existing energy and environmental issues are the primary issues that restrict the continual development of the mankind. Cost-effective energy storage and conversion devices have attracted significant attention. Rechargeable zinc-air batteries (ZABs) are widely studied because they are portable, possess high power density, and are environmentally friendly. However, the slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) limit their practical application. It is crucial to develop dual-functional electrocatalysts with excellent electrocatalytic performance, low price, simple operation, and outstanding stability. Therefore, transition metals and carbon-based materials should be combined. Although Co2P has been widely reported as an efficient OER catalyst, there are few studies based on the ORR activity. Herein, a facile pyrolysis of cobalt salt, phytic acid, and k-carrageenan aerogel was carried out on Co2P nanoparticles within P-doped porous carbon (Co2P-PCA-800), showing enhanced ORR activity. The resulting composite (Co2P-PCA-800) with a three-dimensional (3D) hierarchical porous architecture exhibited outstanding ORR activity with a high half-wave potential (E1/2) of approximately 0.84 V, which is comparable to that of Pt/C. Simultaneously, we fabricated phosphorus-doped porous carbon (PCA) and cobalt-doped porous carbon (Co-CA) to compare the effect of structural morphology on the catalytic performance. Studies have found that a regular interconnected porous structure can be beneficial for mass transfer and can ensure uniform distribution of ion current, thereby resulting in increased number of effective active sites. The outstanding ORR activity mainly results from the synergistic effect of the 3D honeycomb hierarchical porous structure and positively charged Co2P nanoparticles encapsulated in P-doped carbon. In addition, the 3D honeycomb porous carbon structure not only facilitates mass transfer and accelerates electron transfer but also protects the cobalt phosphide. Finally, we assembled a rechargeable ZAB with Co2P-PCA-800 as the air cathode catalyst. Compared with precious metal catalysts, the catalyst has considerable charge-discharge performance and energy density as well as higher specific capacity and better cycle stability. We believe that this study will provide a significant direction for solving energy and environmental issues.

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Section: Introductionmentioning

confidence: 99%

Co<sub>2</sub>P@P-Doped 3D Porous Carbon for Bifunctional Oxygen Electrocatalysis

Xiao¹,

Pei²,

Hu³

et al. 2020

Acta Physico Chimica Sinica

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“…Thus, the insertion of Cu into CoP composites can modulate the electronic configuration, subsequently optimized the energy barrier for the reaction and promoting the electrochemical performance. [184] In addition to phosphidation, ZIFs precursors may also be used for the production of metal selenide decorated into carbon framework. For instance, Meng and co-workers developed very first time a facile strategy for in situ pairing of Co 0.85 Se nanocrystals into N-doped carbon matrix (Co 0.85 Se@NC) by using a technique of direct selenization of zeolitic imidazolate framework-67 (ZIF-67).…”

Section: Transition Metal-doped Carbonsmentioning

confidence: 99%

Section: Recent Advances Of Zif‐derived Electrocatalysts As Air Electrodes For Zabsmentioning

confidence: 99%

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Arafat

Azhar

Zhong

et al. 2021

Advanced Energy Materials

154

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The fast growth in human population and the quick cultural advancement of human society leads to the tremendous increase in energy demand. [1] During the past, fossil fuels were used as the main energy sources, while their excessive use based on the conventional combustion technology releases excessive greenhouse gases into the environment, causing adverse impact on the sustainability of ecosystem. To cope with the challenges of stringent environmental legislations and the reliance on fossil fuels, renewable Secondary Zn-air batteries (ZABs) are recognized as one of the most promising power sources for the future with lucrative features of low cost, high energy density, eco-friendliness, and high safety. However, the widespread implementation of ZABs is still hampered by the sluggish oxygen redox reactions. Thus the deployment of cost-effective and highly efficient air electrodes to substitute precious metals (Pt/Ir), is highly challenging, however, highly desired. Zeolitic imidazolate frameworks (ZIFs) are emerging functional materials, which demonstrate several outstanding characteristics, such as high specific surface area, high conductivity, self-doped N, open pore structure, versatile compositions and favourable chemical stability. Through varying the metal/organic moiety or by employing different synthesis protocols, ZIFs with different properties could be obtained. Being adaptable, desired functionalities may be further incorporated into ZIFs through pre-treatment, in situ treatment, and post treatment. Thus, ZIFs are the ideal precursors for the preparation of variety of bi-functional air electrodes for ZABs by materials tuning, morphological control, or by materials hybridization. Here, the recent advances of ZIFs-based materials are critically surveyed from the perspective of synthesis, morphology, structure and properties, and correlated with performance indicators of ZABs. Finally, the major challenges and future prospects of ZIFs associated with ZABs are discussed.

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“…Without a doubt, developing efficient and clean energy is critical. Hydrogen has been shown to be one of the most promising energy carriers in the future due to its numerous advantages, including diverse sources, zero terminal emissions, and high energy density (120 MJ/kg) [4][5][6]. Electrochemical water splitting, involving two half reactions of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), has been regarded as a promising commercial hydrogen production strategy [7].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous CoP nanowire arrays decorated with carbon‐coated CoP nanoparticles: the role of interfacial engineering for efficient overall water splitting

Xin

et al. 2022

Intl J of Energy Research

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The innovative construction of bifunctional non-noble electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is imperative for electrochemical water splitting. Herein, we provide a collaborative self-templating method to prepare a hybrid catalyst of nanoporous CoP nanowire (NWs) arrays decorated with carbon-coated CoP nanoparticles (NPs). It's found that the unique structure and morphology of the resultant catalyst can provide abundant available active sites and faciliatate the rapid H 2 / O 2 transmission. Additionally, the N-doped carbon improves the conductivity of the catalyst and prevents the aggregation and deactivation of CoP nanoparticles. Forthermore, the strong coupling and synergistic effects by interface engineering are also conducive to the electrochemical performance. Benefiting from these advantages, the CoP NWs/CoP NPs@NC/CC only needs a low overpotential of 103 mV to achieve 10 mA cm À2 with a small Tafel slope of 87 mV dec À1 for HER. When employed in an electrolytic cell as an electrocatalyst for overall water splitting, a low voltage of 1.60 V is required to drive 10 mA cm À2 . This study may provide a novel way to fabricate transitionmetal-based catalysts for water splitting.

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Coupling Co2P and CoP nanoparticles with copper ions incorporated Co9S8 nanowire arrays for synergistically boosting hydrogen evolution reaction electrocatalysis

Cited by 49 publications

References 47 publications

Co<sub>2</sub>P@P-Doped 3D Porous Carbon for Bifunctional Oxygen Electrocatalysis

Co<sub>2</sub>P@P-Doped 3D Porous Carbon for Bifunctional Oxygen Electrocatalysis

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Nanoporous CoP nanowire arrays decorated with carbon‐coated CoP nanoparticles: the role of interfacial engineering for efficient overall water splitting

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