Platinum single-atom and cluster anchored on functionalized MWCNTs with ultrahigh mass efficiency for electrocatalytic hydrogen evolution

Ji, Jiapeng; Zhang, Yaping; Tang, Lin‐bo; Liu, Chenyu; Gao, Xuehui; Sun, Minghao; Zheng, Junchao; Ling, Min; Liang, Chengdu; Lin, Zhan

doi:10.1016/j.nanoen.2019.06.045

Cited by 137 publications

(104 citation statements)

References 28 publications

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“…The Pt in CMP-PtN4 displays typical oxidation state and the valence is close to +2, attributing to the Pt-N 4 coordination environment originated from Pt porphyrin monomer. During the pyrolysis, part of Pt 2+ atoms reduce to Pt 0 and aggregate to form Pt NPs, while the rest of Pt 2+ atoms reduce to lower oxidation valence because of the right shift of the binding energy peaks [40,51]. According to above results and HAADF-STEM images, as-prepared porous carbons are composed both of abundant N coordinated single Pt atoms and NPs.…”

Section: Tablementioning

confidence: 65%

“…[35][36][37][38][39], diminishing the geometric size from submicron to nano-scale or even down to single atom level, etc. [40][41][42]. Many results demonstrate that Pt clusters or single atoms exhibit comparable or even superior performance than commercial Pt/C, such as Song et al anchored Pt atoms onto onion-like carbon nanosphere with high HER performance (overpotential of 38 mV at 10 mA cm −2 ) [2]; Li et al prepared Pt single atoms direct from bulk Pt by a thermal emitting strategy for HER (overpotential is only 23 mV at 10 mA cm −2 ) [23].…”

Section: Introductionmentioning

confidence: 99%

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Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Kang

Wang

et al. 2020

Materials

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Due to the growing demand for energy and imminent environmental issues, hydrogen energy has attracted widespread attention as an alternative to traditional fossil energy. Platinum (Pt) catalytic hydrogen evolution reaction (HER) is a promising technology to produce hydrogen because the consumed electricity can be generated from renewable energy. To overcome the high cost of Pt, one effective strategy is decreasing the Pt nanoparticle (NP) size from submicron to nano-scale or even down to single atom level for efficient interacting water molecules. Herein, atomically dispersed Pt and ultra-fine Pt NPs embedded porous carbons were prepared through the pyrolysis of Pt porphyrin-based conjugated microporous polymer. As-prepared electrocatalyst exhibit high HER activity with overpotential of down to 31 mV at 10 mA cm−2, and mass activity of up to 1.3 A mgPt−1 at overpotential of 100 mV, which is double of commercial Pt/C (0.66 A mgPt−1). Such promising performance can be ascribed to the synergistic effect of the atomically dispersed Pt and ultra-fine Pt NPs. This work provides a new strategy to prepare porous carbons with both atomically dispersed metal active sites and corresponding metal NPs for various electrocatalysis, such as oxygen reduction reaction, carbon dioxide reduction, etc.

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Section: Tablementioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Kang

Wang

et al. 2020

Materials

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“…A recent study demonstrated that Pt atomic clusters anchored to N‐doped graphene exhibit superior activity and stability than that of Pt single atoms, mainly due to the interaction with the pyridinic N contents in the support [9] . Platinum single‐atom anchored on functionalized MWCNTs also showed high activity and durability for HER in acidic electrolyte [10] …”

Section: Introductionmentioning

confidence: 99%

TiO₂ Nanotubes Supported PtO_x Nanoclusters with Enhanced Mass Activity for Electrocatalytic Hydrogen Evolution

2020

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Developing proper supports to enhance Pt mass activity is crucial for the practical application of electrocatalytic hydrogen evolution reaction (HER). Herein, TiO2 nanotubes (TNTs) support is fabricated via anodizing Ti foil and loaded with PtOx nanoclusters using a facile photo‐deposition method. The formation of PtOx was confirmed by X‐ray photoelectron spectroscopy analysis. Interestingly, the TNTs supported PtOx (Ti/TNTs/PtOx) electrocatalyst showed superior activity towards HER than the benchmark Pt/C and TiO2 nanoparticles (TNPs) supported PtOx electrocatalysts. An overpotential of −30 mV was sufficient to deliver −10 mA cm−2 from the acidic medium. The electrocatalytic mass activity of Ti/TNTs/PtOx (i. e. 204 mA mg−1) is enhanced by 12 and 1.7‐fold in comparison with those of Pt/C and TNPs supported PtOx electrocatalysts, respectively. The superior activity of Ti/TNTs/PtOx is mainly due to its large electrochemical active surface area and the excellent electron mobility in TNTs support.

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“…[3] However, the challenges of hydrogen evolution reaction (HER) rely on design and synthesis of outstanding electrocatalysts. [4] Although Ptbased catalysts are confirmed to be high active electrocatalyst for HER, [5,6] Pt-free materials including transition metal carbides, [7] sulfides, [8][9][10] and oxide materials [11] are expected to substitute for noble metal as electrocatalysts for water splitting because of their low cost and high abundance in nature.…”

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confidence: 99%

Mesoporous Carbon Nanotablets Coupled with Mo₂C Nanoparticles: Combining Morphology and Structure to Realize High Activity for Efficient Hydrogen Evolution

Nie

Guo

et al. 2020

ChemistrySelect

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Transition metal carbide such as molybdenum carbide is most potential alternative to Pt catalysts for the hydrogen evolution reaction (HER). A high effective non-noble metal electrocatalyst synthesized by the facile route isurgently needed. Herein, we designed a facile approach to synthesize molybdenum carbide nanocrystal dispersed on hexagonal carbon nanotablets possessing mesoporous structures. The electrocatalytic activities for HER were studied. The results show that as-synthesized molybdenum carbide nanocomposites exhibit a superior HER activity and stability, with an overpotential of 176 mV to drive j = 10 mA cm À 2 in basic solution and a smaller Tafel slope of 52 mV dec À 1 in acidic medium, implying molybdenum carbide hexagonal nanotablets have a promising application as Pt-free electrocatalysts for HER. This strategy also opens a new way to fast synthesize other non-noble metal electrocatalysts for various applications.The excessive exploitation and ongoing depletion of nonrenewable energy sources (such as fossil fuels) have brought environmental problems and energy crisis. As we know, hydro-gen is most suitable to serve as a renewable alternative to fossil fuels in the near future, and more researches highlight on it as a result. [1,2] Among of many methods of hydrogen production, the developments of sustainable and clean route, involving electrocatalytic water splitting, are urgent. [3] However, the challenges of hydrogen evolution reaction (HER) rely on design and synthesis of outstanding electrocatalysts. [4] Although Ptbased catalysts are confirmed to be high active electrocatalyst for HER, [5,6] Pt-free materials including transition metal carbides, [7] sulfides, [8][9][10] and oxide materials [11] are expected to substitute for noble metal as electrocatalysts for water splitting because of their low cost and high abundance in nature.Due to their similarity to the d-band electronic structure, perfect electrical conductivity and excellent hydrogen-adsorption propertiesof Pt, transition metal carbides such as molybdenum carbide (Mo 2 C) have been accepted as the promising and alternative Pt-free catalysts for the involving-hydrogen reaction. [12][13][14][15] Particularly, Mo 2 C hybrids behave as high active in the water splitting-involved reaction. [16][17][18] Recently, the reported works mainly focus on constructing of molybdenum carbide and nanocarbon hybrids to confine the growth of Mo 2 C nanoparticles (NPs), containing octahedrons nanocarbon, [17] nanowires, [19] carbon nanofibers, [20] carbon nanotubes, [21] nanosheets, [22] hollow nanosphere [23] and meshlike carbon nanlayers. [24] The materials' HER electrocatalytic activity has been improved by preventing nanoparticles from aggregation and dispersion of active sites.However, some approaches include complicated process and/or need hydrothermal conditions inevitably before carbonization of Mo-based precursors. As shown in some cases, molybdenum carbide nanocrystals derived from metal-organic frameworks compounds need etching of guest metal...

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Platinum single-atom and cluster anchored on functionalized MWCNTs with ultrahigh mass efficiency for electrocatalytic hydrogen evolution

Cited by 137 publications

References 28 publications

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

TiO₂ Nanotubes Supported PtO_x Nanoclusters with Enhanced Mass Activity for Electrocatalytic Hydrogen Evolution

Mesoporous Carbon Nanotablets Coupled with Mo₂C Nanoparticles: Combining Morphology and Structure to Realize High Activity for Efficient Hydrogen Evolution

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Platinum single-atom and cluster anchored on functionalized MWCNTs with ultrahigh mass efficiency for electrocatalytic hydrogen evolution

Cited by 137 publications

References 28 publications

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

TiO2 Nanotubes Supported PtOx Nanoclusters with Enhanced Mass Activity for Electrocatalytic Hydrogen Evolution

Mesoporous Carbon Nanotablets Coupled with Mo2C Nanoparticles: Combining Morphology and Structure to Realize High Activity for Efficient Hydrogen Evolution

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TiO₂ Nanotubes Supported PtO_x Nanoclusters with Enhanced Mass Activity for Electrocatalytic Hydrogen Evolution

Mesoporous Carbon Nanotablets Coupled with Mo₂C Nanoparticles: Combining Morphology and Structure to Realize High Activity for Efficient Hydrogen Evolution