Collaborative examination on anomalous heat effect using nickel-based binary nanocomposites supported by zirconia

Akira Kitamura, Akito Takahashi, Koh Takahashi, Reiko Seto, Yuki Matsuda, Yasuhiro Iwamura, Takehiko Itoh, Jirohta Kasagi, Masanori Nakamura, Masanobu Uchimura, Hidekazu Takahashi, Tatsumi Hioki, Tomoyoshi Motohiro, Yuichi Furuyama, Masahiro Kishida

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Hydrogen isotope absorption by nickel-based binary nanocomposite samples has been examined in collaborative work in the new NEDO MHE project. The samples tested so far include Pd0.044Ni0.31Zr0.65 ("PNZ3" and re-calcined "PNZ3r") and Cu0.044Ni0.31Zr0.65 ("CNZ5"). Material characterization by XRD and STEM/EDS has revealed the existence of crystalline phases of NiZr2, ZrO2, etc., and nano-meter size structures of binary Pd/Ni or Cu/Ni composites in ZrO2 supporter. All samples at elevated temperatures (200-300°C) showed anomalous heat evolution with excess power of 5-10 W for periods of several days, which corresponded to excess energy of 5 keV/atom-D(H) or 0.5 GJ/mol-D(H). This anomalous heat generation phenomenon could be the basis for practical, carbon-free energy devices that do not produce hard radiations.

Original languageEnglish
Pages (from-to)202-213
Number of pages12
JournalJournal of Condensed Matter Nuclear Science
Publication statusPublished - 2017 Oct 1
Event20th International Conference on Condensed Matter Nuclear Science, ICCF 2016 - Sendai, Japan
Duration: 2016 Oct 22016 Oct 7


  • Anomalous excess heat
  • Binary Ni-based nano-particles
  • Elevated temperature
  • Large hydrogen absorption
  • Meltspinning samples
  • ZrO supporter


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