TY - JOUR
T1 - Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases
AU - Kitamura, Akira
AU - Takahashi, Akito
AU - Takahashi, Koh
AU - Seto, Reiko
AU - Hatano, Takeshi
AU - Iwamura, Yasuhiro
AU - Itoh, Takehiko
AU - Kasagi, Jirohta
AU - Nakamura, Masanori
AU - Uchimura, Masanobu
AU - Takahashi, Hidekazu
AU - Sumitomo, Shunsuke
AU - Hioki, Tatsumi
AU - Motohiro, Tomoyoshi
AU - Furuyama, Yuichi
AU - Kishida, Masahiro
AU - Matsune, Hideki
N1 - Publisher Copyright:
© 2018 Hydrogen Energy Publications LLC
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/8/16
Y1 - 2018/8/16
N2 - Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200–300 °C, most samples with binary metal nanocomposites produced excess power of 3–24 W lasting for up to several weeks. The excess power was observed not only in the D-Pd·Ni system but also in the H–Pd·Ni system and H–Cu·Ni system, while single-element nanoparticle samples produced no excess power. The Pd/Ni ratio is one of the keys to increase the excess power. The maximum phase-averaged excess heat energy exceeded 270 keV/D, and the integrated excess heat energy reached 100 MJ/mol-M or 90 MJ/mol-H. It is impossible to attribute the excess heat energy to any chemical reaction; it is possibly due to radiation-free nuclear process.
AB - Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200–300 °C, most samples with binary metal nanocomposites produced excess power of 3–24 W lasting for up to several weeks. The excess power was observed not only in the D-Pd·Ni system but also in the H–Pd·Ni system and H–Cu·Ni system, while single-element nanoparticle samples produced no excess power. The Pd/Ni ratio is one of the keys to increase the excess power. The maximum phase-averaged excess heat energy exceeded 270 keV/D, and the integrated excess heat energy reached 100 MJ/mol-M or 90 MJ/mol-H. It is impossible to attribute the excess heat energy to any chemical reaction; it is possibly due to radiation-free nuclear process.
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U2 - 10.1016/j.ijhydene.2018.06.187
DO - 10.1016/j.ijhydene.2018.06.187
M3 - Article
AN - SCOPUS:85050303881
VL - 43
SP - 16187
EP - 16200
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 33
ER -
