Photo-reduced Cu/CuO nanoclusters on TiO2 nanotube arrays as highly efficient and reusable catalyst

Zhao, Jianwei; Liu, Chang; Qi, Kun; Cui, Xiaoqiang

doi:10.1038/srep39695

Cited by 118 publications

(69 citation statements)

References 41 publications

(67 reference statements)

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“…3c) confirms the existence of Cu 2+ on the surface of SnO 2 -coated Cu foam, in accordance with the partial re-oxidation during the SnO 2 coating process (Fig. 3a) [11,[18][19][20]. In Sn 3d spectrum of the SnO 2 /Etched Cu foam (Fig.…”

Section: Resultssupporting

confidence: 78%

SnO2-Coated 3D Etched Cu Foam for Lithium-ion Battery Anode

Kim

Cho

et al. 2020

J. Electrochem. Sci. Technol

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SnO 2-based high-capacity anode materials are attractive candidate for the next-generation high-performance lithium-ion batteries since the theoretical capacity of SnO 2 can be ideally extended from 781 to 1494 mAh g-1. Here 3D etched Cu foam is applied as a current collector for electron path and simultaneously a substrate for the SnO 2 coating, for developing an integrated electrode structure. We fabricate the 3D etched Cu foam through an auto-catalytic electroless plating method, and then coat the SnO 2 onto the self-supporting substrate through a simple sol-gel method. The catalytic dissolution of Cu metal makes secondary pores of both several micrometers and several tens of micrometers at the surface of Cu foam strut, besides main channel-like interconnected pores. Especially, the additional surface pores on etched Cu foam are intended for penetrating the individual strut of Cu foam, and thereby increasing the surface area for SnO 2 coating by using even the internal of Cu foam. The increased areal capacity with high structural integrity upon cycling is demonstrated in the SnO 2 coated 3D etched Cu foam. This study not only prepares the etched Cu foam using the spontaneous chemical reactions but also demonstrates the potential for electroless plating method about surface modification on various metal substrates.

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Section: Resultssupporting

confidence: 78%

SnO2-Coated 3D Etched Cu Foam for Lithium-ion Battery Anode

Kim

Cho

et al. 2020

J. Electrochem. Sci. Technol

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“…Jin et al. used a chemical approach to grow Cu NCs on the surface of TiO 2 nanotube arrays to enhance photocatalytic properties . These approaches can be potentially extended to the deposition of NCs of earth‐abundant metals on various metal oxide/chalcogenide 1D nanostructures.…”

Section: Application Of Mncs In Energy Conversionmentioning

confidence: 99%

Metal Nanoclusters: New Paradigm in Catalysis for Water Splitting, Solar and Chemical Energy Conversion

et al. 2019

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A sustainable future demands innovative breakthroughs in science and technology today, especially in the energy sector. Earth‐abundant resources can be explored and used to develop renewable and sustainable resources of energy to meet the ever‐increasing global energy demand. Efficient solar‐powered conversion systems exploiting inexpensive and robust catalytic materials for the photo‐ and photo‐electro‐catalytic water splitting, photovoltaic cells, fuel cells, and usage of waste products (such as CO2) as chemical fuels are appealing solutions. Many electrocatalysts and nanomaterials have been extensively studied in this regard. Low overpotentials, catalytic stability, and accessibility remain major challenges. Metal nanoclusters (NCs, ≤3 nm) with dimensions between molecule and nanoparticles (NPs) are innovative materials in catalysis. They behave like a “superatom” with exciting size‐ and facet‐dependent properties and dynamic intrinsic characteristics. Being an emerging field in recent scientific endeavors, metal NCs are believed to replace the natural photosystem II for the generation of green electrons in a viable way to facilitate the challenging catalytic processes in energy‐conversion schemes. This Review aims to discuss metal NCs in terms of their unique physicochemical properties, possible synthetic approaches by wet chemistry, and various applications (mostly recent advances in the electrochemical and photo‐electrochemical water splitting cycle and the oxygen reduction reaction in fuel cells). Moreover, the significant role that MNCs play in dye‐sensitized solar cells and nanoarrays as a light‐harvesting antenna, the electrochemical reduction of CO2 into fuels, and concluding remarks about the present and future perspectives of MNCs in the frontiers of surface science are also critically reviewed.

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“…To make the bandgap back to be reduced less than 3.0 eV, the doping of impurities to the nanotubes is reported as a promising way 18–20 , which chemical stability is experimentally confirmed as well 16 . Cu doping has especially attracted its interest as a good candidate both experimentally and theoretically due to its high abundance with low cost availability 21,22 . In this work, we investigated such a possibility to get properly tuned bandgap by using ab initio electronic structure analysis.…”

Section: Introductionmentioning

confidence: 99%

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

Gharaei

Abbasnejad

Maezono

2018

Sci Rep

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We performed the electronic structure calculations of Cu-doped TiO2 nanotubes by using density functional theory aided by the Hubbard correction (DFT + U). Relative positions of the sub-bands due to the dopants in the band diagram are examined to see if they are properly located within the redox interval. The doping is found to tune the material to be a possible candidate for the photocatalyst by making the bandgap accommodated within the visible and infrared range of the solar spectrum. Among several possibilities of the dopant positions, we found that only the case with the dopant located at the center of nanotube seems preventing from electron-hole recombinations to achieve desired photocatalytic activity with n-type behavior.

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Photo-reduced Cu/CuO nanoclusters on TiO2 nanotube arrays as highly efficient and reusable catalyst

Cited by 118 publications

References 41 publications

SnO2-Coated 3D Etched Cu Foam for Lithium-ion Battery Anode

SnO2-Coated 3D Etched Cu Foam for Lithium-ion Battery Anode

Metal Nanoclusters: New Paradigm in Catalysis for Water Splitting, Solar and Chemical Energy Conversion

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

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