Led by Haotian Wang (left) and Feng-Yang Chen, the Rice University team published a study this month detailing how its reactor system sustainably converts waste into ammonia. Photo by Jeff Fitlow/Rice University

A team of Rice University engineers has developed a reactor design that can decarbonize ammonia production, produce clean water and potentially have applications in further research into other eco-friendly chemical processes.

Led by Rice associate professor Haotian Wang, the team published a study this month in the journal Nature Catalysis that details how the new reactor system sustainably and efficiently converts nitrates (common pollutants found in industrial wastewater and agricultural runoff) into ammonia, according to the university. The research was supported by Rice and the National Science Foundation.

“Our findings suggest a new, greener method of addressing both water pollution and ammonia production, which could influence how industries and communities handle these challenges,” Wang says in a statement. “If we want to decarbonize the grid and reach net-zero goals by 2050, there is an urgent need to develop alternative ways to produce ammonia sustainably.”

Other methods of creating ammonia include the Haber-Bosh process and electrochemical synthesis. The Haber-Bosh process requires large-scale centralized infrastructure and high temperature and pressure conditions. Meanwhile, electrochemical synthesis requires a high concentration of additive chemicals.

According to Rice, the new reactor requires less additive chemicals than the electrochemical synthesis, allowing nitrates to be converted more sustainably. The reactor relies on an innovative porous solid electrolyte as well as recyclable ions and a three-chamber system to improve the reaction’s efficiency.

Additionally, this development provides an effective water decontamination method.

“We conducted experiments where we flowed nitrate-contaminated water through this reactor and measured the amount of ammonia produced and the purity of the treated water,” Feng-Yang Chen, a Rice graduate student who is the lead author on the study, says. “We discovered that our novel reactor system could turn nitrate-contaminated water into pure ammonia and clean water very efficiently, without the need for extra chemicals. In simple terms, you put wastewater in, and you get pure ammonia and purified water out.”

Pedro Alvarez, the George R. Brown Professor of Civil and Environmental Engineering, director of the Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) and the Water Technologies Entrepreneurship and Research (WaTER) Institute at Rice, says the reactor is "very timely and important" for growing cities that must deal with nitrate-contaminated groundwater supplies it.

"Conventional nitrate removal in drinking water treatment involves ion exchange or membrane filtration by reverse osmosis, which generates brines and transfers the nitrate problem from one phase to another,” he continues.

Wang's lab has been making headlines in recent years for innovative processes and technologies focused on the energy transition.

Last year, the lab published a study in Nature detailing a new technology that uses electricity to remove carbon dioxide from air capture to induce a water-and-oxygen-based electrochemical reaction, generating between 10 to 25 liters of high-purity carbon using only the power of a standard lightbulb.

In 2022, Rice reported that Wang’s lab in the George R. Brown School of Engineering had also replaced rare, expensive iridium with ruthenium, a more abundant precious metal, as the positive-electrode catalyst in a reactor that splits water into hydrogen and oxygen.

The lab received a portion of $10.8 million in research grants from the Houston-based Welch Foundation for research focused on converting carbon dioxide into useful chemicals, such as ethanol, last year. And Solidec, founded by Ryan Duchanois and Yang Xia from Wang's Lab, also received a $100,000 award from Rice as part of the One Small Step Grant program.

Wang has also been named among one of the most-cited researchers in the world.
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Japanese energy tech manufacturer officially relocates U.S. HQ to Houston

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TMEIC Corporation Americas has officially relocated its headquarters from Roanoke, Virginia, to Houston.

TMEIC Corporation Americas, a group company of Japan-based TMEIC Corporation Japan, recently inaugurated its new space in the Energy Corridor, according to a news release from TMEIC. The new HQ occupies the 10th floor at 1080 Eldridge Parkway, according to ConnectCRE. The company first announced the move last summer.

TMEIC Corporation Americas specializes in photovoltaic inverters and energy storage systems. It employs approximately 500 people in the Houston area, and has plans to grow its workforce in the city in the coming year as part of its overall U.S. expansion.

"We are thrilled to be part of the vibrant Greater Houston community and look forward to expanding our business in North America's energy hub," Manmeet S. Bhatia, president and CEO of TMEIC Corporation Americas, said in the release.

The TMEIC group will maintain its office in Roanoke, which will focus on advanced automation systems, large AC motors and variable frequency drive systems for the industrial sector, according to the release.

TMEIC Corporation Americas also began operations at its new 144,000-square-foot, state-of-the-art facility in Brookshire, which is dedicated to manufacturing utility-scale PV inverters, earlier this year. The company also broke ground on its 267,000-square-foot manufacturing facility—its third in the U.S. and 13th globally—this spring, also in Waller County. It's scheduled for completion in May 2026.

"With the global momentum toward decarbonization, electrification, and domestic manufacturing resurgence, we are well-positioned for continued growth," Bhatia added in the release. "Together, we will continue to drive industry and uphold our legacy as a global leader in energy and industrial solutions."

Texas among top states for EV charging access, report shows

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A new study from FinanceBuzz reports that Texas has the fifth most public electric vehicle charging stations among states in the U.S.

In its Electric Vehicle (EV) Statistics [2025]: Trends in Sales, Savings, and More report, FinanceBuzz, a personal finance and investment adviser, compiled electric vehicle data to find sales trends, adoption rates, charging infrastructure, costs, savings and more.

Texas has a total of 3,709 public EV charging stations, which equals about 16 stations per 1,000 EVs, according to the report. The remaining top five included:

  • No. 1 California with 17,122 EV charging stations
  • No. 2 New York with 4,814 EV charging stations
  • No.3 Massachusetts with 3,738 EV charging stations
  • No. 4 Florida with 3,715 EV charging stations

Los Angeles had the most public charging stations at 1,609 among U.S. cities. Austin was Texas’s top city with 656 stations.

The study also looked at how much Americans are spending on transportation, and found that the average American using a gas vehicle spends $1,865 annually on fuel. FinanceBuzz found that electric vehicle owners would pay 65 percent less on energy costs. Calculations were based on driving 14,489 miles annually, which measures to 37.9 miles per day. The full report sourced data from the International Energy Agency, the U.S. Department of Energy, the U.S. Department of Transportation, AAA, the U.S. Energy Information Administration and other organizations.

The report said Americans purchased over 1.5 million EVs in 2024, which equals approximately 10 percent of all new light-duty vehicles sold, citing information from the International Council on Clean Transportation.

While Tesla remains the most popular make, 24 new EV models were launched in 2024 by other companies, which represents a 15 percent increase from the previous year.

Other trends in the report included:

  • The U.S. now has more than 64,000 public charging stations and over 168,000 charging ports, which is up from fewer than 1,000 stations in 2010.
  • An average EV owner will spend about $654 per year on electricity, compared to $1,865 for a gas-powered vehicle. The savings equate to about $1,211 per year.
  • In 2024, U.S. EV sales surpassed 1.5 million, but the pace slowed compared to the previous year, with a 10 percent increase versus 40 percent in 2023.
  • Insuring an EV can be more costly because parts are harder to come by, making repairs and replacements more expensive.
  • In the second quarter of 2024, nearly half of new EVs were leased, which is a 28 percentage point increase since 2021.