Could Cold Fusion Ever Become a Reality?

Main Insights

In March 1989, during a press conference in Salt Lake City, Stanley Pons from the University of Utah and Martin Fleischmann from the University of Southampton in the UK made a groundbreaking declaration. They claimed to have fused hydrogen isotope atomic nuclei to produce helium, mimicking the sun's energy process, and achieved this at room temperature with a net energy gain, as highlighted in a 2009 Wired retrospective.

The findings sparked optimism for a revolutionary energy source that could surpass fossil fuels and traditional nuclear power, as reported in a CBS News story from that era. However, subsequent attempts to replicate the experiments failed or were attributed to experimental flaws, according to a 1989 New York Times article. Peter N. Saeta, a physics professor at Harvey Mudd College, stated in a 1999 Scientific American article that "the majority of the scientific community no longer regards cold fusion as a genuine phenomenon."

The Dream Persists

Despite this, the scientific community's fascination with cold fusion has endured, leading to ongoing research. While definitive proof remains elusive, these efforts have contributed valuable insights in other scientific areas.

For instance, Google supported a multi-year study on cold fusion involving researchers from various universities and Lawrence Berkeley National Laboratory. The team eventually published a 2019 Nature article, admitting that their work "has not provided any evidence of such an effect."

"Nuclear fusion holds the promise of delivering immense energy without generating harmful byproducts," explains Jeremy Munday, a participant in the Google-funded research and a professor of electrical and computer engineering at the University of California, Davis, via email. "For fusion to take place, positively charged atomic nuclei must come close enough to merge. When this happens, energy is released. The challenge lies in overcoming the repulsion between these positively charged nuclei. High density and kinetic energy (high temperature) can facilitate this reaction. While the sun naturally achieves this, replicating such conditions on Earth is extremely difficult. Cold fusion proposes achieving fusion at significantly lower temperatures, making it a viable energy source on our planet."

"It's incredibly challenging to completely dismiss a phenomenon, which is why these ideas have persisted for so long," Munday adds. "While we found no evidence of cold fusion, its existence cannot be entirely ruled out."

To the average person, repeatedly investigating cold fusion might appear to be a futile use of time and resources. However, scientists view it differently, as their efforts often lead to the discovery of new knowledge and the development of innovative technologies.

"The most significant impact of our research in this field has been the spinoffs," Munday explains. "Our collaboration with Google has resulted in over 20 publications in prestigious journals like Nature, Nature Materials, Nature Catalysis, and various American Chemical Society journals, along with two patents. Beyond studies on low-energy fusion, we've also explored the unique material physics and optical properties of metal-hydrides, as well as their applications in sensors and catalysts."

The HERMES Project

In Europe, a team of international scientists has launched the HERMES project, a new investigation into cold fusion using advanced scientific methods and tools developed in recent years.

"The goal is to identify an experiment that consistently produces unusual effects," says Pekka Peljo, the project coordinator and an associate professor in the Department of Mechanical and Materials Engineering at the University of Turku in Finland, via email. "We are revisiting past experiments and conducting detailed studies on the electrochemistry of palladium-hydrogen and palladium-deuterium systems, using well-controlled models like palladium single crystals. HERMES combines fundamental research on the palladium-hydrogen system, replication of promising earlier experiments, and the development of new methods, such as examining reactions at higher temperatures using proton-conductive solid oxides."

Despite these efforts, the researchers remain cautious about the likelihood of discovering evidence of cold fusion.

"Most scientists believe the observed phenomena were likely experimental artifacts, meaning they aren't genuine," Peljo clarifies. "Typically, when palladium is heavily loaded with deuterium, nothing unusual occurs. However, occasionally, for reasons not fully understood, something peculiar seems to happen. Initially, Pons and Fleischmann reported excess heat, but there are also claims of other anomalies, such as neutron radiation or helium production. Yet, reproducibility remains a major issue. These reactions are probably not fusion but rather other nuclear processes occurring within the metal lattice."

The HERMES team won't attempt to replicate Pons and Fleischmann's experiments, as Peljo notes it would be too labor-intensive and challenging.

"Instead, we are concentrating on nanosized materials, where deuterium loading is faster, and the stresses caused by volume changes during insertion are minimized," he explains. "A key focus is co-electrodeposition experiments, where Pd-D is deposited electrochemically. This method was pioneered by Dr. Stanislaw Szpak and Dr. Pamela Mosier-Boss at the U.S. Navy SPAWAR Systems Center in San Diego, California. Their experiments are well-documented and published in numerous peer-reviewed journals, so our initial goal is to replicate their findings."

"This is a high-risk, high-reward endeavor, meaning there's a strong chance we won't observe anything anomalous," Peljo states. "However, if successful, we'll have a reproducible experiment to study these reactions. According to current physics, such reactions shouldn't occur, so a new theoretical framework would be needed to explain them. Additionally, there's potential for developing innovative heat sources, as these reactions are said to generate excess heat from electricity."

Peljo adds that insights from HERMES research into the fundamental properties of palladium-hydrogen systems could also advance the development of more efficient hydrogen production methods for fuel cells to power vehicles.