Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Akira Kitamura; Akito Takahashi; Koh Takahashi; Reiko Seto; Takeshi Hatano; Yasuhiro Iwamura; Takehiko Itoh; Jirohta Kasagi; Masanori Nakamura; Masanobu Uchimura; Hidekazu Takahashi; Shunsuke Sumitomo; Tatsumi Hioki; Tomoyoshi Motohiro; Yuichi Furuyama; Masahiro Kishida; Hideki Matsune

doi:10.1016/j.ijhydene.2018.06.187

Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Akira Kitamura, Akito Takahashi, Koh Takahashi, Reiko Seto, Takeshi Hatano, Yasuhiro Iwamura, Takehiko Itoh, Jirohta Kasagi, Masanori Nakamura, Masanobu Uchimura, Hidekazu Takahashi, Shunsuke Sumitomo, Tatsumi Hioki, Tomoyoshi Motohiro, Yuichi Furuyama, Masahiro Kishida, Hideki Matsune

Research Center for Electron Photon Science (ELPH)

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	16187-16200
Number of pages	14
Journal	International Journal of Hydrogen Energy
Volume	43
Issue number	33
DOIs	https://doi.org/10.1016/j.ijhydene.2018.06.187
Publication status	Published - 2018 Aug 16

Keywords

D-gas
Excess
Heat
H–gas
Nanocomposite
Palladium-nickel

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2018.06.187

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Kitamura, A., Takahashi, A., Takahashi, K., Seto, R., Hatano, T., Iwamura, Y., Itoh, T., Kasagi, J., Nakamura, M., Uchimura, M., Takahashi, H., Sumitomo, S., Hioki, T., Motohiro, T., Furuyama, Y., Kishida, M., & Matsune, H. (2018). Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases. International Journal of Hydrogen Energy, 43(33), 16187-16200. https://doi.org/10.1016/j.ijhydene.2018.06.187

@article{e74cb624e529448599e345511718f0ba,

title = "Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases",

abstract = "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.",

keywords = "D-gas, Excess, Heat, H–gas, Nanocomposite, Palladium-nickel",

author = "Akira Kitamura and Akito Takahashi and Koh Takahashi and Reiko Seto and Takeshi Hatano and Yasuhiro Iwamura and Takehiko Itoh and Jirohta Kasagi and Masanori Nakamura and Masanobu Uchimura and Hidekazu Takahashi and Shunsuke Sumitomo and Tatsumi Hioki and Tomoyoshi Motohiro and Yuichi Furuyama and Masahiro Kishida and Hideki Matsune",

note = "Publisher Copyright: {\textcopyright} 2018 Hydrogen Energy Publications LLC",

year = "2018",

month = aug,

day = "16",

doi = "10.1016/j.ijhydene.2018.06.187",

language = "English",

volume = "43",

pages = "16187--16200",

journal = "International Journal of Hydrogen Energy",

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Kitamura, A, Takahashi, A, Takahashi, K, Seto, R, Hatano, T, Iwamura, Y, Itoh, T, Kasagi, J, Nakamura, M, Uchimura, M, Takahashi, H, Sumitomo, S, Hioki, T, Motohiro, T, Furuyama, Y, Kishida, M & Matsune, H 2018, 'Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases', International Journal of Hydrogen Energy, vol. 43, no. 33, pp. 16187-16200. https://doi.org/10.1016/j.ijhydene.2018.06.187

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

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.

KW - D-gas

KW - Excess

KW - Heat

KW - H–gas

KW - Nanocomposite

KW - Palladium-nickel

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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

SN - 0360-3199

VL - 43

SP - 16187

EP - 16200

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 33

ER -

Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Abstract

Keywords

UN SDGs

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