| S. Focardi, R. Habel, F. Piantelli (Bologna, Cagliari, Siena) | 1994 | Il Nuovo Cimento A 107 (1): 163 (1994), DOI 10.1007/BF02813080 | nickel rod heated in hydrogen; heat balance measured against electrical input | bulk nickel rod, hydrogen gas | hydrogen loaded into nickel at elevated temperature | resistive heating of the rod in hydrogen | hydrogenrecharged nickel maintained hot during runs | the authors report about 50 W anomalous heat production in the hydrogen-loaded nickel rod |
| Y. Arata, Y.-C. Zhang (Osaka University) | 1999 | Proc. Japan Acad. Ser. B 75 (10): 281-286 (1999), DOI 10.2183/pjab.75.281 | double-structure (DS) cathode: hollow palladium vessel filled with palladium fine powder, immersed in heavy-water electrolysis; inner atmosphere sampled | palladium vessel plus palladium black / fine powder core; D2O electrolyte | highly deuterated palladium powder inside the sealed vessel | deuterium loading by electrolysis at the outer wall; diffusion into the powder bed | continuous electrolysis runs of order 2,000 hours | the authors report excess heat of about 5 to 10 W sustained over 2,000 hours and abundant gaseous helium-4 measured in the inner atmosphere of the DS-cathode |
| Y. Arata, Y.-C. Zhang (Osaka University) | 2002 | Proc. Japan Acad. Ser. B 78 (3): 57-62 (2002), DOI 10.2183/pjab.78.57 | nanometer-sized metal powder (atom clusters) as gas-loading host; solid-state reactor concept | nanometer palladium (and zirconia plus nano-palladium composites) | deuterium or hydrogen absorbed above 300 percent of host metal atom number density, dissolved at room temperature | gas loading; the authors attribute reported heat to condensed deuterium lattices (pycnodeuterium) in cluster unit cells | room-temperature loading; sealed powder beds | the authors report extreme deuterium uptake in nano-clusters (greater than 300 percent against host atom density) and propose each unit cell as a minimum solid-fusion reactor unit |
| Y. Arata, Y.-C. Zhang (Osaka University) | 2008 | APS March Meeting 2008 contributed abstract (meetings-archive.aps.org/mar/2008/a17/13) | electrolysis-loaded powder composite in ionic-solid plus nano-metal form | powdered zirconium-oxide plus nano-palladium (ZrO2 + nanoPd) composite | electrolysis-loaded deuterium in the powder composite | electrolytic loading with the composite held as a packed bed | long-duration run | the abstract reports about 10 W excess heat sustained for about 400 hours |
| A. Kitamura, Y. Sasaki, Y. Miyoshi, A. Taniike, A. Takahashi, R. Seto, Y. Fujita (Osaka University, Kobe University) | 2011 | J. Condensed Matter Nuclear Science 4 (1): 56-68 (2011), DOI 10.70923/001c.72142 | twin hydrogen-absorption system with heat measurement and charged-particle diagnostics | 0.1 micrometer palladium powder, palladium black, mixed oxides Pd-Zr, Pd-Ni-Zr, Ni-Zr | deuterium/hydrogen gas absorption; loading ratio and absorption energy increase with surface fineness | pressurized H2 or D2 gas absorption onto heated nano-powder | high-pressure gas exposure; repeated bake-hydrogenation cycles | the authors report hydride-formation energies of 1.5 to 2.3 eV per D (1.5 to 2.0 eV per H) after artificial re-oxidation, and intermittent positive heat output in the post-deuteride phase when samples were charged with D2 only |
| T. Hioki, H. Azuma, T. Nishi, A. Itoh, S. Hibi, J. Gao, T. Motohiro (Toyota Central R&D Labs), J. Kasagi (Tohoku University) | 2011 | J. Condensed Matter Nuclear Science 4 (1): 69-80 (2011), DOI 10.70923/001c.72143 | Sieverts-type absorption measurement plus flow calorimetry under pressurization | palladium nanopowder 10-20 nm; palladium on gamma-alumina (Pd/gamma-Al2O3) with 2-5 nm palladium particles | gas loading at 1 MPa; absorption capacity slightly below bulk palladium; negligible H-D isotope effect in capacity | pressurization with H2 or D2 up to 1 MPa at elevated temperature | repeated runs without air exposure; two-stage heat evolution observed | the authors report first-stage heat explained by water-formation and deuteride-formation chemistry, and intermittent small heat power in the second stage (constant 1 MPa hold), observed frequently with D2 loading |
| A. Kitamura, Y. Miyoshi, H. Sakoh, A. Taniike, Y. Furuyama, A. Takahashi, R. Seto, Y. Fujita, T. Murota, T. Tahara (Kobe University, Technova Inc.) | 2014 | J. Condensed Matter Nuclear Science 13 (1): 277-289 (2014), DOI 10.70923/001c.72257 | gas-phase hydrogen isotope absorption with silica-inclusion of the active powder for reusability | palladium nanopowder in porous silica (PSII) and palladium-nickel nanocomposite (PNS) | repeated hydrogenation-oxidation cycles on the same sample charge | H2 or D2 gas absorption at elevated temperature | many-cycle operation including forced oxidation between runs | the authors report that absorption parameters persist across repeated runs and point to a role of admixed minority atoms (palladium or nickel on nickel or palladium hosts) in the heat behavior |
| A. Kitamura, A. Takahashi, R. Seto, Y. Fujita, A. Taniike, Y. Furuyama (Kobe University, Technova Inc.) | 2015 | Current Science 108 (4): 589-593 (2015) | mass-flow calorimetry system for nano-composite metal powders under gas charging | nickel-based and palladium-based nano-composites on oxide supports | D2 or H2 gas charging of the powder bed | gas charging with electrical heating of the reaction chamber | oil mass-flow calorimetry around the reaction chamber | the authors report their calorimetry method and anomalous heat effect results for nano-composite metals under D(H)-gas charging (summary paper) |
| A. Kitamura, A. Takahashi, R. Seto, Y. Fujita, A. Taniike, Y. Furuyama (Kobe University, Technova Inc.) | 2016 | J. Condensed Matter Nuclear Science 19 (1): 135-144 (2016), DOI 10.70923/001c.72382 | hydrogen absorption runs in a reaction chamber with oil-flow calorimetry; binary nano-composites versus single-component controls | Pd0.016Ni0.070/SiO2 (PNSII) and Cu0.011Ni0.077/SiO2 (CNS2) on mesoporous silica; controls NiO/Ni and Ni/SiO2 | H2 absorption to metal saturation at elevated temperature | hydrogen gas absorption with heating up to 350 degrees C | elevated-temperature runs after saturation of hydrogen absorption into the metal | the authors report excess power reaching 8 W per gram palladium and 1 W per gram nickel, integrated excess energies of 3.8 keV per Pd atom (6.5 keV per H atom) and 0.6 keV per Ni atom (10 keV per H atom), observed only for the binary nano-composites and only after absorption saturation |
| A. Kitamura, A. Takahashi, K. Takahashi, R. Seto, T. Hatano, Y. Iwamura, T. Itoh, J. Kasagi, M. Nakamura, M. Uchimura, H. Takahashi, S. Sumitomo, T. Hioki, T. Motohiro, Y. Furuyama, M. Kishida, H. Matsune (Technova Inc., Tohoku University, Nissan Motor Co., Nagoya University, Kobe University, Kyushu University) | 2018 | Int. Journal of Hydrogen Energy 43: 16187-16200 (2018) | six-organization MHE collaboration experiments; oil mass-flow calorimetry with identical sample sets split between Kobe and Tohoku laboratories | zirconia- and silica-supported nano-composites: Cu-Ni-Zr oxide, Pd-Ni-Zr oxide, Cu-Ni on silica, palladium on silica | H2 or D2 gas at about 1 MPa from reservoir volumes of 1 to 2 L | gas charging plus electrical heating (sheath and cartridge heaters) | sample temperatures 150 to 350 degrees C; ambient held at 23 plus or minus 0.1 degrees C; typical sample mass 100 g in a bed of 1,300 g zirconia beads | the peer-reviewed journal version of the collaboration results; the authors report excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases |
| T. Itoh, Y. Iwamura, J. Kasagi, H. Shishido (Tohoku University) | 2017 | J. Condensed Matter Nuclear Science 24: 179-190 (2017), proceedings of ICCF20 (International Conference on Condensed Matter Nuclear Science, Sendai 2016) | nano-structured multilayer Pd/Ni surface fabricated by glow discharge; gas cell with calorimetry | palladium-nickel nano-structured multilayer on substrate | D2 or H2 gas exposure of the nano-structured surface | gas charging with sample heating | elevated-temperature gas loading | the authors report anomalous excess heat generated by interaction between the nano-structured Pd/Ni surface and D2/H2 gas |
| Y. Iwamura, T. Itoh, J. Kasagi, A. Kitamura, A. Takahashi, K. Takahashi (Tohoku University, Technova Inc.) | 2017 | J. Condensed Matter Nuclear Science 24: 191-201 (2017), proceedings of ICCF20 (Sendai 2016) | replication at Tohoku University of the Kobe gas-charging experiments with a matched calorimetry system | nickel-based binary nanocomposites (Cu-Ni-Zr oxide class) | hydrogen isotope gas charging | gas charging plus electrical heating | same class of conditions as the Kobe source experiments | the authors report replication experiments at Tohoku University on anomalous heat generation using nickel-based binary nanocomposites and hydrogen isotope gas |
| Y. Iwamura, T. Itoh, J. Kasagi (Tohoku University) with Technova Inc., Nissan Motor Co., Nagoya University, Kobe University, Kyushu University | 2019 | J. Condensed Matter Nuclear Science 29: 119-128 (2019), collaboration period October 2015 to October 2017 | six-organization collaborative campaign; new oil mass-flow calorimetry system at Tohoku; sixteen numbered experiments across Kobe, Tohoku and Kyushu | CNZ (Cu1Ni7Zr15-Ox), PNZ (Pd1Ni7Zr15-Ox), CNS (Cu1Ni10/SiO2), PSn1 (Pd in mesoporous SiO2); zirconia bead bed around 100 g samples | H2 or D2 from 1 to 2 L reservoirs at about 1 MPa | gas charging plus two heaters (1 kW sheath, 200 W cartridge) | elevated temperature 150 to 350 degrees C; chamber ambient 23 plus or minus 0.1 degrees C; runs of hundreds of hours | the authors report anomalous excess heat for all binary nano-composite samples (not for palladium-on-silica controls): maximum powers 2.5 to 25 W; released enthalpies 1.4 to 200 MJ per mol H(D); per-atom yields 15 eV/H or D up to 2.1 keV/D (PNZ6 with D2, 25 W); coincident pressure and gas-temperature burst events with CNZ and H2 (replicated), shattered zirconia beads and nanocomposite adhered to the flange after runs; matching enthalpies and powers between Kobe and Tohoku with the same samples |
| Y. Iwamura and co-workers (Tohoku University and collaborators) | 2024 | Japanese Journal of Applied Physics 63: 037001 (2024), DOI 10.35848/1347-4065/ad2622 | nano-structured multilayer metal composites in hydrogen gas; peer-reviewed consolidation of the multilayer line | multilayer nano-structured metal composites (palladium-nickel class) | hydrogen gas loading of the multilayer stack | gas charging with heating | elevated-temperature hydrogen exposure | the authors report anomalous heat generation that cannot be explained by known chemical reactions, produced by nano-structured multilayer metal composites and hydrogen gas |
| A.G. Parkhomov, E.O. Belousova (Russia) | 2016 | J. Condensed Matter Nuclear Science 19 (1): 244-256 (2016), DOI 10.70923/001c.72394 | small sealed reactors similar to the high-temperature Rossi reactor design; alumina-style body, nickel powder charge, electrical heating | nickel powder with hydrogen (his 2015 long-term test report describes the nickel powder plus lithium aluminum hydride additive charge) | hydrogen released in situ from the powder charge | resistive heating to incandescence | reactor temperatures at about 1,100 degrees C and higher; radiation monitors on the reactor during operation | the authors report excess heat at about 1,100 degrees C and higher, and that no nuclear radiation above background level was observed during the excess heat production |
