3D Graphene Aerogels Decorated with Cobalt Phosphide Nanoparticles as Electrocatalysts for the Hydrogen Evolution Reaction

Zhang, Xueping; Han, Yujie; Huang, Liang; Dong, Shaojun

doi:10.1002/cssc.201600904

Cited by 58 publications

(22 citation statements)

References 51 publications

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“…Graphene can not only prevent the aggregation of the TMPs, but also interconnect the separate nanoparticles to improve the charge transfer kinetics and structural stability through facilitating electrons transfer. Therefore, graphene‐based composite exhibits enhanced catalytic activities for HER . For example, Ma et al reported the fabrication of CoP nanoparticles deposited on reduced graphene oxide sheets to enhance electrocatalytic activity for the HER .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, graphene-based composite exhibits enhanced catalytic activities for HER. [6,8] For example, Ma et al reported the fabrication of CoP nanoparticles deposited on reduced graphene oxide sheets to enhance electrocatalytic activity for the HER. [9] Jiao et al developed CoP/rGO composites as superior bifunctional catalysts for overall water splitting.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

Wang

Lei

et al. 2017

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134

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The development of highly efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant for clean and renewable energy research. This work reports the synthesis of N-doped graphene nanosheets supported N-doped carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis and a subsequent phosphating process by using polyaniline. The obtained electrocatalyst exhibits excellent electrochemical activity for HER with a small overpotential of -135 mV at 10 mA cm and a low Tafel slope of 59.3 mV dec in 0.5 m H SO . Additionally, the encapsulation of N-doped carbon shell prevents CoP nanoparticles from corrosion, exhibiting good stability after 14 h operation. Moreover, the as-prepared electrocatalyst also shows outstanding activity and stability in basic and neutral electrolytes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

Wang

Lei

et al. 2017

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134

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“…So far, little attention have demonstrated that incorporation of transition metals (e. g., Mn, Al and Ni) into CoP, could enhance catalytic activity by altering the crystal lattice and bond length to modify the free energy of hydrogen adsorption on catalyst surface . Besides, other studies are implying that hybridization of CoP and nanocarbon materials such as graphene oxide, graphene, carbon nanotubes and porous carbon derived by metal‐organic frameworks (MOFs), are alternative way to increase the conductivity of the catalysts . Although, recent studies are highlighted that CoP encapsulated nitrogen doped carbon based nanohybrid catalysts are significantly improve the catalytic activity compared than carbon coated CoP counterparts .…”

Section: Introductionmentioning

confidence: 99%

CoP Embedded in Hierarchical N‐Doped Carbon Nanotube Frameworks as Efficient Catalysts for the Hydrogen Evolution Reaction

2018

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Highly efficient, nonprecious and stable electrocatalysts for the hydrogen evolution reaction (HER) are absolutely crucial for renewable energy conversion, yet the design of such catalysts remains to be a long and arduous task. Herein, cobalt phosphide (CoP) nanoparticles (NPs) embedded in hierarchical N‐doped carbon nanotube frameworks (CoP‐HNCs) have been synthesized by controlled phosphidation of cobalt NPs embedded in hierarchical N‐doped carbon nanotube frameworks (Co‐HNCs). The Co‐HNCs were prepared by direct carbonization of Co‐based zeolitic imidazolate networks (ZIF‐67). Benefitting from multiple structural and compositional features, such as a multitude of catalytically active sites, a high degree of graphitization, and a thin carbon layer enclosing the NPs, CoP‐HNCs serve as a superior electrocatalyst towards the hydrogen evolution reaction. The synthesized CoP‐HNCs delivered a low overpotential at a current density of 10 mA cm−2 (η10) of 79 mV and 96 mV with small Tafel slope value of 45.6 mV dec−1 and 49.5 mV dec−1 in acidic and alkaline conditions, respectively. In addition, the catalyst showed long‐time durability under both acidic and alkaline electrolyte conditions, further demonstrating their potential to replace Pt‐based precious catalysts.

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confidence: 99%

Highly Efficient Utilization of Precious Metals for Hydrogen Evolution Reaction with Photo‐Assisted Electro‐Deposited Urchin‐Like Te Nanostructure as a Template

Bai

Zhao

et al. 2019

ChemCatChem

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In this communication, the urchin-like Te template is obtained by photo-assisted electro-deposition to replace trace platinum, gold and rhodium to obtain the Pt@Te-PsS, Au@Te-PsS and Rh@Te-PsS catalysts in pursuit of their highly efficient utilization. The three-dimensional structure of urchin-like Te can not only accelerate the interface charge transfer, but also enhance the structural stability of the catalysts. Moreover, the electrons of Te are delocalized, to increase the electron density of interface and promote the hydrogen evolution reaction. Especially, the Pt@Te-PsS catalyst with the Pt loading of only 1.08 wt % exhibits extremely outstanding electrocatalytic hydrogen evolution reaction activity. The finer hierarchical structure of Te template boosts the high HER performance with low precious metal loading, which highlights a new strategy for development of high-efficiency electrocatalysts.The sustainable production of hydrogen from electrocatalytic water splitting is an appealing solution that requires a highly active, efficient and long-term stable electrocatalyst for the storage and conversion of renewable energy resources. [1][2][3] As benchmark electrocatalysts, precious metal-based catalysts have been proved to be the most efficient catalysts. [4][5][6][7][8] Nevertheless, their scarcity, high cost and weak stability impede their large-scale industrial application. [9][10][11][12] Therefore, the highly efficient utilization of precious metal is significantly important. [13][14][15][16][17] Recently, some efforts have been dedicated to reduce the precious metal loading. For example, the construction of coreshell structure just need to develop a ultra-thin precious metal shells on metal or non-metal cores. [18][19][20][21][22][23][24] The hierarchical nanostructures can also be utilized as templates to effectively reduce the loading of the precious metal, and the stability of catalysts can be greatly improved by inert template. Tellurium (Te) crystals have various structures, different surface properties and controllable synthesis without subsequent treat, which shown the superiority of Te as a sacrificial template for loading precious metal. [25][26][27][28][29][30] In addition, Te is a p-type semiconductor with a bandgap energy of 0.35 eV, endowed with sensitive photoelectric properties. [31][32] Poly-3-ethylthiophene (P3HT) is commonly used in organic photovoltaic devices, and forms a molecular heterojunction with semiconductive single-walled carbon nanotubes (s-SWNTs) to improve its charge separation efficiency. [33][34] Thus, the composite of P3HT and s-SWNTs (PsS) is eligible as the substrate of Te template by photo-assisted electrodeposition, which can enhance the nucleation rate of Te to tendentiously form uniform and stable hierarchical structure.Herein, urchin-like Te template with a large specific surface area was synthesized by simple and novel method of photoassisted electrodeposition the first time using PsS as the substrate, and used to chemical replace trace platinum (Pt), gold (Au) a...

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3D Graphene Aerogels Decorated with Cobalt Phosphide Nanoparticles as Electrocatalysts for the Hydrogen Evolution Reaction

Cited by 58 publications

References 51 publications

Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

CoP Embedded in Hierarchical N‐Doped Carbon Nanotube Frameworks as Efficient Catalysts for the Hydrogen Evolution Reaction

Highly Efficient Utilization of Precious Metals for Hydrogen Evolution Reaction with Photo‐Assisted Electro‐Deposited Urchin‐Like Te Nanostructure as a Template

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