Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity

Alinezhad, Ali; Gloag, Lucy; Benedetti, Tânia M.; Cheong, Soshan; Webster, Richard F.; Roelsgaard, Martin; Iversen, Bo B.; Schuhmann, Wolfgang; Gooding, J. Justin; Tilley, Richard D.

doi:10.1021/jacs.9b07659

Cited by 128 publications

(118 citation statements)

References 50 publications

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“…[33,34], controlling the morphology with special size and shape (sphere, cube, polyhedron, nanowire, nanorod, nanotube, etc.) [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].…”

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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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: Introductionmentioning

confidence: 99%

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Kang

Wang

et al. 2020

Materials

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“…[1][2][3][4][5]18] Ni metal typically adopts the fcc crystal structure; however, methods for forming nanoscale Ni adopting the metastable hcp crystal phase have recently been developed. [19][20][21] Based on the hcp crystal structure of Ni, an opportunity arises for a cubic-core hexagonal-branch mechanism to synthesize 3D branched nanoparticles with the uniformity needed for high-performance catalysis.…”

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confidence: 99%

Faceted Branched Nickel Nanoparticles with Tunable Branch Length for High‐Activity Electrocatalytic Oxidation of Biomass

et al. 2020

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Controlling the formation of nanosized branched nanoparticles with high uniformity is one of the major challenges in synthesizing nanocatalysts with improved activity and stability. Using a cubic‐core hexagonal‐branch mechanism to form highly monodisperse branched nanoparticles, we vary the length of the nickel branches. Lengthening the nickel branches, with their high coverage of active facets, is shown to improve activity for electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMF), as an example for biomass conversion.

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“…The hydrogen evolution reaction (HER) process is regarded as a best available strategy for producing high-purity hydrogen from abundant water Jia et al, 2020). Platinum (Pt) and its alloys are commonly considered as benchmark catalysts for the HER, but the high cost largely impedes its commercial applications (Alinezhad et al, 2019;Park et al, 2019;Jia et al, 2020). Recently, earth-abundant catalysts, especially 3d transition metal compounds, have been reported (Li et al, 2017(Li et al, , 2018Zhu et al, 2020.…”

Section: Introductionmentioning

confidence: 99%

In situ Engineering of Hollow Porous Mo2C@C Nanoballs Derived From Giant Mo-Polydopamine Clusters as Highly Efficient Electrocatalysts for Hydrogen Evolution

Liu

Cheng

et al. 2020

Front. Chem.

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Low-cost and highly effective catalysts are crucial to the electrocatalytic hydrogen evolution reaction (HER). Among non-noble catalysts, molybdenum carbides are promising candidates because of their high reserves, stability, low cost, and structural diversity. In this work, we report a simple method to fabricate a hollow porous Mo 2 C@C nanoball through a hydrothermal preparation process of molybdenum precursors at high temperatures. Specifically, we have combined interfacial polymerization and the chelation effect to synthesize the Mo-polydopamine (Mo-PDA) precursor. As a result, Mo 2 C@C-3 only requires an ultralow Tafel slope (∼55 mV dec −1) and low overpotential (η 50 ≈ 167 mV) in a 0.5 M H 2 SO 4 solution with long-term cycling stability. Besides, it also exhibits outstanding activity and stability under extensive HER testing in alkaline media. This study is promising for the development of advanced molybdenum carbide electrocatalysts toward electrochemical applications.

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Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity

Cited by 128 publications

References 50 publications

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Platinum Atoms and Nanoparticles Embedded Porous Carbons for Hydrogen Evolution Reaction

Faceted Branched Nickel Nanoparticles with Tunable Branch Length for High‐Activity Electrocatalytic Oxidation of Biomass

In situ Engineering of Hollow Porous Mo2C@C Nanoballs Derived From Giant Mo-Polydopamine Clusters as Highly Efficient Electrocatalysts for Hydrogen Evolution

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