Anomalous heat effects induced by metal nano-composites and hydrogen gas

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

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Collaborative research among Technova Inc., Nissan Motor Co. Ltd., Kobe Univ., Kyushu Univ., Nagoya Univ. and Tohoku Univ. was done from Oct. 2015 to Oct. 2017. For this collaborative work, a new accurate oil mass-flow calorimetry system was developed at Tohoku University to replicate anomalous heat generation experiments reported by Technova and the Kobe Univ. Group. In this paper, we present evidence of anomalous excess heat effects obtained from experiments at our laboratory at Tohoku University. Excess energy experiments were done using nano-sized metal composites with H2 or D2 gas. Anomalous excess heat generation were observed for all the samples at elevated temperature (150-350°C) except for the palladium nanoparticles embedded in mesoporous SiO2 (PSn1). The amount of anomalous heat generation per hydrogen atom ranged from 15 eV/H or D to 2.1 keV/H or D, which is too much to be explained by any known chemical process. Coincident burst events of pressure and gas temperature were observed for all the experiments using the CuNi7Zr15-Ox with H2 gas, which suggested sudden energy releases in the reaction chamber. These observations suggest large local energy bursts. Excess heat experiments using the same material at Kobe and Tohoku Universities showed similar experimental results. Qualitative reproducibility between the Kobe and Tohoku experiments was good.

Original languageEnglish
Pages (from-to)119-128
Number of pages10
JournalJournal of Condensed Matter Nuclear Science
Publication statusPublished - Aug 1 2019
Event21st International Conference on Condensed Matter Nuclear Science, ICCF 2018 - Fort Collins, United States
Duration: Jun 3 2018Jun 8 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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