An earth-abundant and multifunctional Ni nanosheets array as electrocatalysts and heat absorption layer integrated thermoelectric device for overall water splitting

Zhao, Lili; Yang, Zhiyuan; Cao, Qing; Yang, Linjing; Zhang, Xiaofei; Jia, Jin; Sang, Yuanhua; Wu, Hsin‐Jay; Zhou, Weijia; Liu, Hong

doi:10.1016/j.nanoen.2018.11.035

Cited by 55 publications

(28 citation statements)

References 46 publications

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“…To verify such electronic interaction between heterogeneous components, the Ni 2p‐core XPS spectra were measured for CN/NNPs (Figure f), and pure NNPs with around 30 nm in size were synthesized as a reference (Figure S3, Supporting Information). For pure NNPs, apart from two satellite peaks at 861.7 (2p 3/2 ) and 880 eV (2p 1/2 ), the two peaks at 852.5 and 870.1 eV are identified as Ni 0 2p 3/2 and Ni 0 2p 1/2 ; the other two peaks at 856.0 and 873.6 eV are associated with Ni 2+ 2p 3/2 and Ni 2+ 2p 1/2 as a result of surface oxidation of metal exposure to air . Importantly, these characteristic peaks detected in CN/NNPs are accompanied by negative shift to lower binding energies, meaning the increase in electron density of NNPs in contact with CN.…”

Section: Resultsmentioning

confidence: 94%

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

et al. 2020

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Exploring low-cost and high-activity cocatalysts cooperated with semiconductors is a prerequisite to advance cost-efficient photocatalytic water splitting. Herein, nickel nanoparticles (NNPs) loaded on graphitic carbon nitride (CN) as unique non-noble metal cocatalysts with electric and thermal excitation upon surface plasmon for photocatalytic hydrogen (H 2 ) evolution reaction (HER) are designed. The plasmonic NNPs not only endow highly active sites, steering hot electron extraction from excited CN toward HER against charge recombination, but also act as full-spectrum light-harvesting antennas enabling plasmon heating for kinetic acceleration. As a result, the optimized CN/NNP hybrid exhibits a significant increase in the H 2 -evolution rate up to 13.23 mmol g À1 h À1 with temperature up to 73 C within 2 h, which far surpasses bare CN and even outperforms CN/Pt hybrid. This work describes the capacity of plasmonic cocatalysts to convert the supplementary photon flux into numerous stimuli, which provides new inspirations for designing photocatalytic systems for solar energy conversion.

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Section: Resultsmentioning

confidence: 94%

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

et al. 2020

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“…are at the forefront due to their unique structure, hydrogen binding activity, and excellent electrochemical performance. [14][15][16][17][18][19][20] However, most of the electrocatalysts exhibit stellar catalytic performance in a specific electrolyte media such as acidic, neutral, or alkaline and exhibit dwindling electrocatalytic efficiency under common electrolyte media. Similarly, their poor stability and inadequate electroactive sites have significantly hindered their electrocatalytic efficiency towards overall water splitting.…”

Section: Introductionmentioning

confidence: 99%

Scalable solid-state synthesis of MoS₂–NiS₂/graphene nanohybrids as bifunctional electrocatalysts for enhanced overall water splitting

2020

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“…As imilars tudy in which particles were coated on at hermoelectric generator was reported by Zhao et al [54] In this case, an earth-abundant element,N i, was deposited in the form of nanosheet layersg rown on the hot side of the generator, which act as am ultifunctional agent ( Figure 15). The as-grown layer works as an electrocatalyst, as well as ah eat absorption layer for the thermoelectric device and hence supports in the improvement of overall water splitting.T he voltage generated from the thermoelectric device was given to aw ater splitting unit.…”

Section: The "Heat To Hydrogen" Conceptmentioning

confidence: 60%

“…Schematic representation of Ni nanosheeta rray growth on thermoelectric device.Reproduced with permission from Ref [54]. (Copyright Elsevier, 2019).…”

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confidence: 99%

Powering the Hydrogen Economy from Waste Heat: A Review of Heat‐to‐Hydrogen Concepts

Mulla

Dunnill

2019

ChemSusChem

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Ever‐increasing energy demands and environmental concerns require new and clean energy supplies, many of which are intermittent and do not correlate with demand. To balance supply with demand, a universal energy vector should be employed such that intermittent renewable energy can be stored and transported and then used when needed. Hydrogen is the perfect universal energy vector and a possible solution that ensures environmental cleanliness, maximum utilization of renewable energy sources, and high efficiency, whereby the combustion of the fuel yields only water. One abundant and freely available energy source—both anthropogenic and natural—is heat. Heat can be obtained from industrial processes and is indeed often viewed as a waste product with a premium to remove but is notoriously difficult to capture, store, and transport. Capturing and storing low‐grade heat therefore provides a significant opportunity and can be achieved by coupling thermoelectric generators and water electrolyzers. A thermoelectric generator is placed within a thermal energy gradient and produces a flow of current that is fed to the electrolysis unit with which it produces hydrogen and oxygen as the final products. The hydrogen can be stored for long periods and transported for “on‐demand” use in fuel cells for electricity from hydrogen burners for a return to thermal energy. This Review summarizes the current state‐of‐the‐art research into implementing thermoelectric generators and utilizing heat as a primary energy source to produce hydrogen, which could replace the need for extra electric power to run hydrogen production units. Furthermore, suitable requirements, modifications, and other related aspects associated with such a new and novel method of hydrogen generation are discussed. Hydrogen produced from otherwise‐wasted energy sources can be considered to be green.

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An earth-abundant and multifunctional Ni nanosheets array as electrocatalysts and heat absorption layer integrated thermoelectric device for overall water splitting

Cited by 55 publications

References 46 publications

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

Scalable solid-state synthesis of MoS₂–NiS₂/graphene nanohybrids as bifunctional electrocatalysts for enhanced overall water splitting

Powering the Hydrogen Economy from Waste Heat: A Review of Heat‐to‐Hydrogen Concepts

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An earth-abundant and multifunctional Ni nanosheets array as electrocatalysts and heat absorption layer integrated thermoelectric device for overall water splitting

Cited by 55 publications

References 46 publications

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

Plasmonic Cocatalyst with Electric and Thermal Stimuli Boots Solar Hydrogen Evolution

Scalable solid-state synthesis of MoS2–NiS2/graphene nanohybrids as bifunctional electrocatalysts for enhanced overall water splitting

Powering the Hydrogen Economy from Waste Heat: A Review of Heat‐to‐Hydrogen Concepts

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Scalable solid-state synthesis of MoS₂–NiS₂/graphene nanohybrids as bifunctional electrocatalysts for enhanced overall water splitting