TY - JOUR
T1 - Electrothermally tunable morphological and redox design of heterogeneous Pd/PdxOy/carbon for humidity-hydron-driven energy harvesters
AU - Seo, Byungseok
AU - Kim, Woosung
AU - Park, Seonghyun
AU - Song, Chanho
AU - Kim, Sungsoo
AU - Choi, Wonjoon
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( Ministry of Science and ICT ) (Nos. 2019R1A2C2085583 , 2020R1A5A1018153 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - Rational design of morphological and redox properties is essential for metal/metal oxides/carbon-based electrochemical electrodes. However, their conventional fabrication and screening entail time-consuming and complex processes involving phase and interface segregation, making it difficult to fully integrate the advantages of individual constituents. Here, we report an electrothermally tunable morphological and redox design of heterogeneous Pd/PdxOy/carbon for humidity-hydron-driven energy harvester (H-dEHs). Electrothermal waves (ETWs) triggered by Joule heating induce thermochemical reactions (~2000 °C) passing through precursors of Pd nitrates and carbon within seconds. The programmable power and duration of single and multiple ETW pulses facilitate morphological and compositional traps capturing metastable phases of thermodynamically dispersed Pd species anchored on carbon fibers. The phase maps considering the threshold of structural and chemical transition offer fast screening of optimal Pd/PdxOy/carbon electrodes for H-dEHs fabricated by combining the active materials with poly(4-styrenesulfonic acid), thereby generating sustainable potential up to 3.9 V for 350 h, using ambient humidity as the stimulus. The ETW-based design strategy will inspire extremely rapid, yet precisely controlled fabrication routes to sorting and optimizing complex properties of heterogeneous materials, potentially useful for diverse applications, such as energy harvesting devices, electrochemical cells, catalysts, electromagnetic shielding, and sensors.
AB - Rational design of morphological and redox properties is essential for metal/metal oxides/carbon-based electrochemical electrodes. However, their conventional fabrication and screening entail time-consuming and complex processes involving phase and interface segregation, making it difficult to fully integrate the advantages of individual constituents. Here, we report an electrothermally tunable morphological and redox design of heterogeneous Pd/PdxOy/carbon for humidity-hydron-driven energy harvester (H-dEHs). Electrothermal waves (ETWs) triggered by Joule heating induce thermochemical reactions (~2000 °C) passing through precursors of Pd nitrates and carbon within seconds. The programmable power and duration of single and multiple ETW pulses facilitate morphological and compositional traps capturing metastable phases of thermodynamically dispersed Pd species anchored on carbon fibers. The phase maps considering the threshold of structural and chemical transition offer fast screening of optimal Pd/PdxOy/carbon electrodes for H-dEHs fabricated by combining the active materials with poly(4-styrenesulfonic acid), thereby generating sustainable potential up to 3.9 V for 350 h, using ambient humidity as the stimulus. The ETW-based design strategy will inspire extremely rapid, yet precisely controlled fabrication routes to sorting and optimizing complex properties of heterogeneous materials, potentially useful for diverse applications, such as energy harvesting devices, electrochemical cells, catalysts, electromagnetic shielding, and sensors.
KW - Electrochemical electrode
KW - Electrothermal synthesis
KW - Humidity-driven energy harvesting
KW - Material processing
KW - Palladium-palladium oxide-carbon composite
UR - http://www.scopus.com/inward/record.url?scp=85125845032&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2022.107053
DO - 10.1016/j.nanoen.2022.107053
M3 - Article
AN - SCOPUS:85125845032
SN - 2211-2855
VL - 95
JO - Nano Energy
JF - Nano Energy
M1 - 107053
ER -