New approach to waste-heat energy harvesting: pyroelectric energy conversion

Pandya, Shishir; Velarde, Gabriel; Zhang, Lei; Wilbur, Joshua D.; Smith, Andrew N.; Hanrahan, Brendan; Dames, Chris; Martin, Lane W.

doi:10.1038/s41427-019-0125-y

Cited by 87 publications

(59 citation statements)

References 26 publications

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“…It would be meaningful to harvest such abundant energy source during temperature variation. Such a motive is reasonable because pyroelectric materials can convert heat energy into electric energy via repeating cooling or heating process [11][12][13] . Pyroelectric materials can produce positive and negative electric charges during temperature variation.…”

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confidence: 99%

Pyroelectric nanoplates for reduction of CO2 to methanol driven by temperature-variation

Xiao

Jia

et al. 2021

Nat Commun

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Carbon dioxide (CO2) is a problematic greenhouse gas, although its conversion to alternative fuels represents a promising approach to limit its long-term effects. Here, pyroelectric nanostructured materials are shown to utilize temperature-variations and to reduce CO2 for methanol. Layered perovskite bismuth tungstate nanoplates harvest heat energy from temperature-variation, driving pyroelectric catalytic CO2 reduction for methanol at temperatures between 15 °C and 70 °C. The methanol yield can be as high as 55.0 μmol⋅g−1 after experiencing 20 cycles of temperature-variation. This efficient, cost-effective, and environmental-friendly pyroelectric catalytic CO2 reduction route provides an avenue towards utilizing natural diurnal temperature-variation for future methanol economy.

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mentioning

confidence: 99%

Pyroelectric nanoplates for reduction of CO2 to methanol driven by temperature-variation

Xiao

Jia

et al. 2021

Nat Commun

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“…b) The typical Olsen cycle where the polarization is represented as a function of the electric field E . [ 44 ] c) the Lenoir cycle. The colour map indicates the temperature variation.…”

Section: Current Technologiesmentioning

confidence: 99%

Section: Current Technologiesmentioning

confidence: 99%

Waste Heat to Power: Technologies, Current Applications, and Future Potential

et al. 2020

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Energy consumption, environmental impact, and sustainability have risen fast through the ranks, achieving the first places in driving investments, policies, and concerns of all countries at any developmental stage. Energy transformation, though, must cope with nonunitary efficiency of devices and processes, which results in a distributed production of waste heat. A reduction of emissions, implying a conversion of waste heat to more noble forms of energy and a concurrent increase in efficiency of the same devices and processes, is of paramount importance. In view of the enthalpy content and distribution of the different sources of waste heat, low‐grade/low‐enthalpy sources below 200 °C are considered the most fertile field for research and development, with an impressive industrial growth rate. Thermodynamic cycles and thermal conversion devices based on the most relevant physical effects are herein introduced and briefly described, including both solutions that already achieved industrial maturity and less developed systems and devices whose study is still in progress. A specific focus on three application domains, selected due to their economic relevance, is done: industrial processes for the vast energy and capital availability, automotive sector for its permeation, and wearable devices for the market size. Limits and opportunities are critically discussed.

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“…The impact could be tremendous if we could harvest such abundant energy source during temperature variation. Such a motive is not unreasonable considering that pyroelectric materials can convert heat energy into electric energy via repeating cooling or heating process [11][12][13] . Similar to the photocatalysis, pyroelectrocatalytic process can produce positive and negative charges by using pyroelectric materials as the active media during temperature variation.…”

Section: Introductionmentioning

confidence: 99%

Pyroelectrocatalytic CO2 reduction for methanol driven by temperature-variation

Xiao¹,

Xu²,

Jia³

et al. 2020

Preprint

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Taking the advantages of pyroelectric nanostructured materials, we use the temperature-variation, a ubiquitous phenomenon in our daily life, to reduce carbon dioxide (CO2) for methanol through pyroelectrocatalytic process. Layered-perovskite bismuth tungstate nanoplates harvest heat energy from temperature-variation, driving pyroelectrocatalytic CO2 reduction for methanol at temperatures between 15 °C and 70 °C. The methanol yield can be as high as 55.0 µmol·g−1 after experiencing 20 cycles of temperature-variation. This efficient, cost-effective, and environmental-friendly pyroelectrocatalytic CO2 reduction route provides a new thought towards utilizing natural diurnal temperature-variation for future methanol economy.

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New approach to waste-heat energy harvesting: pyroelectric energy conversion

Cited by 87 publications

References 26 publications

Pyroelectric nanoplates for reduction of CO2 to methanol driven by temperature-variation

Pyroelectric nanoplates for reduction of CO2 to methanol driven by temperature-variation

Waste Heat to Power: Technologies, Current Applications, and Future Potential

Pyroelectrocatalytic CO2 reduction for methanol driven by temperature-variation

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