Active sites engineering of Pt/CNT oxygen reduction catalysts by atomic layer deposition

Gan, Jie; Zhang, Jiankang; Zhang, Baiyan; Chen, Wenyao; Niu, Dongfang; Qin, Yong; Duan, Xuezhi

doi:10.1016/j.jechem.2019.09.024

Cited by 64 publications

(24 citation statements)

References 47 publications

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“…[33,34] This technique can precisely control the overall particle sizes and distribution. [35] In this work, ALD was chosen for developing nanostructured Pt catalyst with small size and excellent uniformity to achieve the low loading amount of Pt in the hybrid catalysts. Pt was further deposited on the surface of the G-CNFs by ALD or MSD.…”

Section: Preparation and Structure Of Pt/g-cnfsmentioning

confidence: 99%

Platinum Cluster/Carbon Quantum Dots Derived Graphene Heterostructured Carbon Nanofibers for Efficient and Durable Solar‐Driven Electrochemical Hydrogen Evolution

Wang

Zhang

et al. 2022

Small Methods

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Among various types of clean energy sources, hydrogen is considered promising due to its high energy density, zero carbon emission during combustion. [4][5][6] To fully deploy technologies for hydrogen production, there is a critical need for the selection of efficient hydrogen evolution reaction (HER) catalysts. [7][8][9] Many researchers focus on producing cost-effective Pt-based catalysts by enhancing the active sites of the Pt (e.g., single atom-based catalysts) and distribution of the Pt in the supports, which can largely decrease the amount of Pt. [10][11][12][13] However, up to date, it is still a major challenge to stabilize Pt nanoclusters during the HER. [14,15] 1D or 2D nanostructures can have large surface energy, spatial confinement, and tunable imperfections, which endow them with unique properties, such as increased catalytic activity, enhanced mechanical strength, and chemical stability. [16][17][18][19] Combining 0D Pt nanocluster with 1D/2D nanostructures can prevent their aggregation and mass loss in catalytic recycling. [20] Until now, considerable efforts have focused on developing low-dimensional heterostructures. [21,22] Carbon nanofibers (CNFs) possess unique mechanical, thermal, and Large scale solar-driven hydrogen production is a crucial step toward decarbonizing society. However, the solar-to-hydrogen (STH) conversion efficiency, long-term stability, and cost-effectiveness in hydrogen evolution reaction (HER) still need to be improved. Herein, an efficient approach is demonstrated to produce low-dimensional Pt/graphene-carbon nanofibers (CNFs)-based heterostructures for bias-free, highly efficient, and durable HER. Carbon dots are used as efficient building blocks for the in situ formation of graphene along the CNFs surface. The presence of graphene enhances the electronic conductivity of CNFs to ≈3013.5 S m −1 and simultaneously supports the uniform Pt clusters growth and efficient electron transport during HER. The electrode with a low Pt loading amount (3.4 µg cm −2 ) exhibits a remarkable mass activity of HER in both acidic and alkaline media, which is significantly better than that of commercial Pt/C (31 µg cm −2 of Pt loading). In addition, using a luminescent solar concentrator-coupled solar cell to provide voltage, the bias-free water splitting system exhibits an STH efficiency of 0.22% upon one-sun illumination. These results are promising toward using low-dimensional heterostructured catalysts for future energy storage and conversion applications.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smtd.202101470.

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Section: Preparation and Structure Of Pt/g-cnfsmentioning

confidence: 99%

Platinum Cluster/Carbon Quantum Dots Derived Graphene Heterostructured Carbon Nanofibers for Efficient and Durable Solar‐Driven Electrochemical Hydrogen Evolution

Wang

Zhang

et al. 2022

Small Methods

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“…As an example, the studies on platinum-decorated tungsten carbide particles or thin films decorated with platinum thin layers using the MeCpPtMe 3 -based ALD process revealed the possibility of obtaining relatively stable catalytic systems comparable to the Pt/C catalyst with significantly lower Pt loading. [136,41] ALD deposition of the platinum nanoparticles represents one of the optimization routes, and was utilized (in addition to the already mentioned works) also in decoration of carbon nanotubes, [137] of porous TiN supports, [138] or on antimony-doped tin oxide. [139] In these reports the main effort was put into maximalization of the active surface of the platinum catalysts and/or stabilization of the catalytic systems.…”

Section: Catalysts For Orr Prepared By Aldmentioning

confidence: 99%

Applications of Atomic Layer Deposition in Design of Systems for Energy Conversion

Plutnar

Pumera

2021

Small

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There is a huge demand for clean energy conversion in all industries. The clean energy production processes include electrocatalytic and photocatalytic conversion of water to hydrogen, carbon dioxide reduction, nitrogen conversion to ammonia, and oxygen reduction reaction and require novel cheap and efficient photo‐ and electrocatalysts and their scalable methods of fabrication. Atomic layer deposition is a thin film deposition method that allows to deposit thin layers of catalysts on virtually any surface of any shape, size, and porosity in an even and easy to control manner. Here the state of the art in applications of atomic layer deposition in the clean energy production and the opportunities it represents for the whole field of the photo‐ and electrocatalysis for a sustainable future are reviewed.

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“…An excellent support should have high conductivity, strong corrosion resistance, and a reasonable specific surface area. − In addition, enhancing the interaction between the metal and support can effectively inhibit the aggregation and shedding of the nanoparticles. Current research on support materials mainly focused on carbon materials (e.g., carbon black, carbon nanotubes, and graphene). − However, these carbon materials are facile to be corroded during long-term electrochemical cycles, resulting in the shedding of nanoparticles …”

Section: Introductionmentioning

confidence: 99%

Metal–Support Interactions in a Molybdenum Oxide Anchored PtNi Alloy for Improving Oxygen Reduction Activity

Feng

Chen

Qian

et al. 2020

ACS Appl. Energy Mater.

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The PtNi alloy exhibits excellent catalytic activity for oxygen reduction. However, particle agglomeration and support corrosion during the electrochemical reaction inevitably decrease its catalytic stability. Herein, we synthesize PtNi anchored on MoO x (PtNi-MoO x /NC) catalysts by pyrolysis treatment and the ethylene glycol method. It exhibits better catalytic stability than the commercial Pt/C and the prepared PtNiMo ternary catalysts. After the 30k cycle accelerated degradation test, the catalytic activity attenuations for PtNi−MoO 3 /NC and PtNi−MoO 2 /NC are 17 and 24%, respectively, which are lower than that of the commercial Pt/C (59%) and the prepared PtNiMo/NC (70%). The stability enhancement can be attributed to the strong metal−support interactions that effectively restrain the aggregation and shedding of PtNi nanoparticles. This work provides a promising strategy to improve the catalytic stability by introducing insoluble metal oxides as support materials for oxygen reduction reaction.

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Active sites engineering of Pt/CNT oxygen reduction catalysts by atomic layer deposition

Cited by 64 publications

References 47 publications

Platinum Cluster/Carbon Quantum Dots Derived Graphene Heterostructured Carbon Nanofibers for Efficient and Durable Solar‐Driven Electrochemical Hydrogen Evolution

Platinum Cluster/Carbon Quantum Dots Derived Graphene Heterostructured Carbon Nanofibers for Efficient and Durable Solar‐Driven Electrochemical Hydrogen Evolution

Applications of Atomic Layer Deposition in Design of Systems for Energy Conversion

Metal–Support Interactions in a Molybdenum Oxide Anchored PtNi Alloy for Improving Oxygen Reduction Activity

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