Pyroelectrically driven cold-hot energy harvesting for green hydrogen production of Ag-decorated Ba0.7Sr0.3TiO3 nanofibers
Abstract
Temperature fluctuations, ubiquitous in daily life, remain underexplored for hydrogen production. Here, we demonstrate hydrogen evolution by harvesting energy from cold–hot alternations between 293 and 323 K (20-50 °C) using pyroelectric Ba 0.7 Sr 0.3 TiO 3 nanofibers (BST NFs) and Ag-decorated BST nanofibers (BST/Ag NFs). BST NFs were synthesized by electrospinning, followed by photoreduction of 5 wt% Ag, producing uniformly dispersed nanoparticles. Under a temperature variation of 0.46 K at 0 V vs. RHE and 0.1 Hz, pyroelectric current densities reached 37 and 78 nAcm −2 for BST and BST/Ag, respectively. Ag decoration reduced the band gap from 3.12 to 2.75 eV and lowered charge-transfer resistance, enabling a hydrogen yield of 477 μmolg −1 after 30 thermal cycles. The enhanced performance arises from improved interfacial charge transfer, higher conductivity through the BST/Ag Schottky junction, and additional active sites, demonstrating an efficient, recyclable, and sustainable approach for clean hydrogen production.
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BibTeX
@article{hadouch2026pyroelectrically,
title = {{Pyroelectrically driven cold-hot energy harvesting for green hydrogen production of Ag-decorated Ba0.7Sr0.3TiO3 nanofibers}},
author = {Youness Hadouch and Salma Touili and Salma Elmouloua and Daoud Mezzane and M'Barek Amjoud and Anna Razumnaya and Anja Pogačnik Krajnc and Maja Remškar and Nejc Suban and Hana Uršič and Jamal Belhadi and Brigita Rozic and Igor Lukyanchuk and Mimoun El Marssi and Zdravko Kutnjak},
journal = {International Journal of Hydrogen Energy},
year = {2026},
month = oct,
doi = {10.1016/j.ijhydene.2026.157974},
url = {https://u-picardie.hal.science/hal-05796592v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Pyroelectrically driven cold-hot energy harvesting for green hydrogen production of Ag-decorated Ba0.7Sr0.3TiO3 nanofibers
AU - Youness Hadouch
AU - Salma Touili
AU - Salma Elmouloua
AU - Daoud Mezzane
AU - M'Barek Amjoud
AU - Anna Razumnaya
AU - Anja Pogačnik Krajnc
AU - Maja Remškar
AU - Nejc Suban
AU - Hana Uršič
AU - Jamal Belhadi
AU - Brigita Rozic
AU - Igor Lukyanchuk
AU - Mimoun El Marssi
AU - Zdravko Kutnjak
PY - 2026
DA - 2026/10/13
JO - International Journal of Hydrogen Energy
DO - 10.1016/j.ijhydene.2026.157974
UR - https://u-picardie.hal.science/hal-05796592v1
AB - Temperature fluctuations, ubiquitous in daily life, remain underexplored for hydrogen production. Here, we demonstrate hydrogen evolution by harvesting energy from cold–hot alternations between 293 and 323 K (20-50 °C) using pyroelectric Ba 0.7 Sr 0.3 TiO 3 nanofibers (BST NFs) and Ag-decorated BST nanofibers (BST/Ag NFs). BST NFs were synthesized by electrospinning, followed by photoreduction of 5 wt% Ag, producing uniformly dispersed nanoparticles. Under a temperature variation of 0.46 K at 0 V vs. RHE and 0.1 Hz, pyroelectric current densities reached 37 and 78 nAcm −2 for BST and BST/Ag, respectively. Ag decoration reduced the band gap from 3.12 to 2.75 eV and lowered charge-transfer resistance, enabling a hydrogen yield of 477 μmolg −1 after 30 thermal cycles. The enhanced performance arises from improved interfacial charge transfer, higher conductivity through the BST/Ag Schottky junction, and additional active sites, demonstrating an efficient, recyclable, and sustainable approach for clean hydrogen production.
SN - 0360-3199
SN - 1879-3487
ER -