switch flipped

Houston researchers develop catalyst for emission-free hydrogen production using light instead of heat

Researchers created a light-driven catalyst for hydrogen production, offering an emission-free alternative to traditional methods. Photo by Jeff Fitlow/Rice University

Researchers at Rice University have developed a catalyst that could render steam methane reforming, or SMR, entirely emission-free by using light rather than heat to drive the reaction.

The researchers believe the work could prove to be a breakthrough for extending catalyst lifetimes. This will improve efficiencies and reduce costs for a number of industrial processes that are affected by a form of carbon buildup that can deactivate catalysts called coking.

The new copper-rhodium photocatalyst uses an antenna-reactor design. When it is exposed to a specific wavelength of light it breaks down methane and water vapor without external heating into hydrogen and carbon monoxide. The importance of this is it is a chemical industry feedstock that is not a greenhouse gas. Rice’s work also shows that the antenna-reactor technology can overcome catalyst deactivation due to oxidation and coking by employing hot carriers to remove oxygen species and carbon deposits, which effectively regenerates the catalyst with light.

The new SMR reaction pathway build off a 2011 discovery from Peter Nordlander, Rice’s Wiess Chair and Professor of Physics and Astronomy and professor of electrical and computer engineering and materials science and nanoengineering, and Naomi Halas. They are the authors on the study about the research that was published in Nature Catalysis. The study showed that the collective oscillations of electrons that occur when metal nanoparticles are exposed to light can emit “hot carriers” or high-energy electrons and holes that can be used to drive chemical reactions.

“This is one of our most impactful findings so far, because it offers an improved alternative to what is arguably the most important chemical reaction for modern society,” Norlander says in a news release.

The research was supported by Robert A. Welch Foundation (C-1220, C-1222) and the Air Force Office of Scientific Research (FA9550-15-1-0022) with the Shared Equipment Authority at Rice providing data analysis support.

“This research showcases the potential for innovative photochemistry to reshape critical industrial processes, moving us closer to an environmentally sustainable energy future,” Halas adds.

Hydrogen has been studied as it could assist with the transition to a sustainable energy ecosystem, but the chemical process responsible for more than half of the current global hydrogen production is a substantial source of greenhouse gas emissions.Hydrogen is produced in large facilities that require the gas to be transported to its point of use. Light-driven SMR allows for on-demand hydrogen generation,which researchers believe is a key benefit for use in mobility-related applications like hydrogen fueling stations or and possibly vehicles.

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A View From HETI

Enbridge Inc. is now generating 130 megawatts of energy from its Orange Grove solar project near Corpus Christi. Photo courtesy Enbridge

Canadian energy company Enbridge Inc., whose gas transmission and midstream operations are based in Houston, has flipped the switch on its first solar power project in Texas.

The Orange Grove project, about 45 miles west of Corpus Christi, is now generating 130 megawatts of energy that feeds into the grid operated by the Electric Reliability Council of Texas (ERCOT). ERCOT supplies electricity to 90 percent of the state.

Orange Grove features 300,000 solar panels installed on more than 920 acres in Jim Wells County. Construction began in 2024.

Telecom giant AT&T has signed a long-term power purchase agreement with Enbridge to buy energy from Orange Grove at a fixed price. Rather than physically acquiring this power, though, AT&T will receive renewable energy certificates. One renewable energy certificate represents the consumption of one megawatt of grid power from renewable energy sources such as solar and wind.

“Orange Grove is a key part of our commitment to develop, construct, and operate onshore renewable projects across North America,” Matthew Akman, executive vice president of corporate strategy and president of renewable power at Enbridge, said in 2024.

Orange Grove isn’t Enbridge’s only Texas project. Enbridge owns the 110-megawatt Keechi wind farm in Jacksboro, about 60 miles northwest of Fort Worth, and the 249.1-megawatt Chapman Ranch wind farm near Corpus Christi, along with a majority stake in the 203.3-megatt Magic Valley I wind farm near Harlingen. The company’s 815-megawatt Sequoia solar project, east of Abilene, is scheduled to go online in early 2026. Enbridge has signed long-term power purchase agreements with AT&T and Toyota North America for energy produced by Sequoia.

During a recent earnings call, Enbridge President and CEO Greg Ebel said that given the “unprecedented demand for power generation across North America,” driven largely by explosive growth in the data center sector, the company expects to unveil more renewable energy projects.

“The policy landscape for renewables is dynamic,” Ebel said, “but we think we are well-positioned with our portfolio of late-stage (projects).”

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