P.J. Popovic, CEO of Houston-based Rhythm, explains Renewable Energy Certificates work and their impact on Texas. Photo courtesy of Rhythm

We all know what renewable energy is — wind, solar, biomass, geothermal, hydropower — but how do you purchase it? It's invisible. Not to mention when energy from any source enters the electricity grid, there's no way to track all those electrons.

Renewable Energy Certificates have made it possible

Renewable Energy Certificates, or RECs, allow us to track your clean energy. Each individual REC represents one megawatt-hour of clean energy generated. And while a REC isn't technically electricity, it represents the clean energy going into the electricity grid—meaning homes and businesses claim their commitment to renewable energy if their electricity is supported by RECs.

It's also important to understand what a renewable energy certificate is not: an offset. An offset represents a metric ton of emissions avoided and a REC represents 1 MWh of clean energy generated. While each have similar goals, they are not quite the same thing.

Not all RECs are created equally

The market for RECs is fluid. Due to the growth of the renewable energy market, RECs have been oversupplied for years. This has created low prices and little-to-no financial advantage for the facilities that generate clean electricity (e.g., wind facilities, solar farms, hydro plants).

In Texas, the retail electricity market is inundated with renewable electricity claims said to be supported by RECs. The energy plan you sign up for might come from solar, wind, biomass, or even trash incineration, but the renewable energy facilities likely are coming from outside Texas, located in places like California, Canada, or elsewhere. While there's no wrong way to switch to renewable energy, supporting renewable energy sources inside Texas helps Texans move closer to being a more sustainable state.

Choosing Texas renewable energy plans and your actions do have a true, real-world impact more than ever before

Some critics have argued that REC-supported renewable energy plans don't meet the highest standard of sustainability arguing RECs are not foundational to the existence of renewable energy assets. In other words, they argue that RECs don't provide a material revenue source for renewable projects because they don't incentivize new developments of renewable facilities to be built.

When RECs were trading for less than a dollar, this was a valid argument. But that was then, and this is now.

In the last year alone, voluntary renewable energy certificate prices have skyrocketed and are now between $7 and $10 per MWh. This means RECs can now contribute up to 30 percent of a renewable facility's revenue. Naturally, this encourages more and more clean-energy facilities and clean-energy jobs to be created. A win-win.

What about Power Purchase Agreements?

A Power Purchase Agreement, or PPA, is a tad different than a REC. In a PPA, the developer of a renewable project (solar arrays at a solar farm, or turbines at a wind farm) can sell the actual energy it produces over a 10-to-20-year contract.

While the sale of this renewable energy still contributes to a larger portion of project revenues, the revenue mix has clearly shifted, and RECs cannot be considered an immaterial incentive anymore. Sure, PPAs are a stronger market signal for renewable project development, but only a couple of hundred organizations globally utilize PPAs. This makes them very challenging for businesses to access.

Through PPAs, various risks, credit needs, and long-term commitments create challenges for many organizations to meet their sustainability goals. So, while RECs do not provide as material of a market signal as PPAs, with the recent changes in market prices, RECs can now be considered a meaningful, profitable market signal for renewable projects.

Making the future of renewable energy in Texas even brighter.

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P.J. Popovic is the CEO of Houston-based Rhythm.

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7 top Houston researchers join Rice innovation cohort for 2025

top of class

The Liu Idea Lab for Innovation and Entrepreneurship (Lilie) has announced its 2025 Rice Innovation Fellows cohort, which includes students developing cutting-edge thermal management solutions for artificial intelligence, biomaterial cell therapy for treating lymphedema, and other innovative projects.

The program aims to support Rice Ph.D. students and postdocs in turning their research into real-world solutions and startups.

“Our fourth cohort of fellows spans multiple industries addressing the most pressing challenges of humanity,” Kyle Judah, Lilie’s executive director, said in a news release. “We see seven Innovation Fellows and their professors with the passion and a path to change the world.”

The seven 2025 Innovation Fellows are:

Chen-Yang Lin, Materials Science and Nanoengineering, Ph.D. 2025

Professor Jun Lou’s Laboratory

Lin is a co-founder of HEXAspec, a startup that focuses on creating thermal management solutions for artificial intelligence chips and high-performance semiconductor devices. The startup won the prestigious H. Albert Napier Rice Launch Challenge (NRLC) competition last year and also won this year's Energy Venture Day and Pitch Competition during CERAWeek in the TEX-E student track.

Sarah Jimenez, Bioengineering, Ph.D. 2027

Professor Camila Hochman-Mendez Laboratory

Jimenez is working to make transplantable hearts out of decellularized animal heart scaffolds in the lab and the creating an automated cell delivery system to “re-cellularize” hearts with patient-derived stem cells.

Alexander Lathem, Applied Physics and Chemistry, Ph.D. 2026

Professor James M. Tour Laboratory

Lathem’s research is focused on bringing laser-induced graphene technology from “academia into industry,” according to the university.

Dilrasbonu Vohidova is a Bioengineering, Ph.D. 2027

Professor Omid Veiseh Laboratory

Vohidova’s research focuses on engineering therapeutic cells to secrete immunomodulators, aiming to prevent the onset of autoimmunity in Type 1 diabetes.

Alexandria Carter, Bioengineering, Ph.D. 2027

Professor Michael King Laboratory

Carter is developing a device that offers personalized patient disease diagnostics by using 3D culturing and superhydrophobicity.

Alvaro Moreno Lozano, Bioengineering, Ph.D. 2027

Professor Omid Veiseh Lab

Lozano is using novel biomaterials and cell engineering to develop new technologies for patients with Type 1 Diabetes. The work aims to fabricate a bioartificial pancreas that can control blood glucose levels.

Lucas Eddy, Applied Physics and Chemistry, Ph.D. 2025

Professor James M. Tour Laboratory

Eddy specializes in building and using electrothermal reaction systems for nanomaterial synthesis, waste material upcycling and per- and polyfluoroalkyl substances (PFAS) destruction.

This year, the Liu Lab also introduced its first cohort of five commercialization fellows. See the full list here.

The Rice Innovation Fellows program assists doctoral students and postdoctoral researchers with training and support to turn their ideas into ventures. Alumni have raised over $20 million in funding and grants, according to Lilie. Last year's group included 10 doctoral and postdoctoral students working in fields such as computer science, mechanical engineering and materials science.

“The Innovation Fellows program helps scientist-led startups accelerate growth by leveraging campus resources — from One Small Step grants to the Summer Venture Studio accelerator — before launching into hubs like Greentown Labs, Helix Park and Rice’s new Nexus at The Ion,” Yael Hochberg, head of the Rice Entrepreneurship Initiative and the Ralph S. O’Connor Professor in Entrepreneurship, said in the release. “These ventures are shaping Houston’s next generation of pillar companies, keeping our city, state and country at the forefront of innovation in mission critical industries.”

Houston startup Collide secures $5M to grow energy-focused AI platform

Fresh Funds

Houston-based Collide, a provider of generative artificial intelligence for the energy sector, has raised $5 million in seed funding led by Houston’s Mercury Fund.

Other investors in the seed round include Bryan Sheffield, founder of Austin-based Parsley Energy, which was acquired by Dallas-based Pioneer Natural Resources in 2021; Billy Quinn, founder and managing partner of Dallas-based private equity firm Pearl Energy Investments; and David Albin, co-founder and former managing partner of Dallas-based private equity firm NGP Capital Partners.

“(Collide) co-founders Collin McLelland and Chuck Yates bring a unique understanding of the oil and gas industry,” Blair Garrou, managing partner at Mercury, said in a news release. “Their backgrounds, combined with Collide’s proprietary knowledge base, create a significant and strategic moat for the platform.”

Collide, founded in 2022, says the funding will enable the company to accelerate the development of its GenAI platform. GenAI creates digital content such as images, videos, text, and music.

Originally launched by Houston media organization Digital Wildcatters as “a professional network and digital community for technical discussions and knowledge sharing,” the company says it will now shift its focus to rolling out its enterprise-level, AI-enabled solution.

Collide explains that its platform gathers and synthesizes data from trusted sources to deliver industry insights for oil and gas professionals. Unlike platforms such as OpenAI, Perplexity, and Microsoft Copilot, Collide’s platform “uniquely accesses a comprehensive, industry-specific knowledge base, including technical papers, internal processes, and a curated Q&A database tailored to energy professionals,” the company said.

Collide says its approximately 6,000 platform users span 122 countries.

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This story originally appeared on our sister site, EnergyCapitalHTX.com.

Houston femtech co. debuts first holistic wellness suite following rebrand

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Houston-based femtech company Work&, previously Work&Mother, debuted new lactation suites and its first employee wellness space at MetroNational’s Memorial City Plazas this month.

The 1,457-square-foot Work& space features three lactation rooms and five wellness suites, the latter of which are intended to offer employees a private space and time for telehealth appointments, meditation, prayer, and other needs. The hybrid space, designed by Houston-based Inventure, represents Work&'s shift to offer an array of holistic health and wellness solutions to landlords for tenants.

Work& rebranded from Work&Mother earlier this year. The company was previously focused on outfitting commercial buildings with lactation accommodations for working parents, equipped with a hospital-grade pump, milk storage bags, sanitizing wipes, and other supplies. While Work& will still offer these services through its Work&Mother branch, the addition of its Work&Wellbeing arm allows the company to also "address the broader wellness needs of all employees," according to an announcement made on LinkedIn.

"We are thrilled to bring Work&Mother and Work&Wellbeing to The Plazas," Jules Lairson, co-founder and COO of Work&, said in a news release. “This partnership brings every stakeholder together – employees, employers and landlords all benefit from this kind of forward-thinking tenant experience. We are excited to launch our Work&Wellbeing concept with MetroNational to ensure that all employees have their wellness needs met with private, clean, quiet spaces for use during the workday.”

The new space is available to all tenants across Memorial City Plazas, comprised of three office towers totaling 1 million square feet of Class A office space. In addition to the lactation and wellness suites, the space also features custom banquettes, private lounge seating and phone booths.

“As a family-owned and operated company, MetroNational is deeply committed to fostering a workplace that supports both productivity and the well-being of all our tenants,” Anne Marie Ratliff, vice president of asset management for MetroNational, added in the release. “Partnering with Work& reinforces this commitment, enhancing our workplace experience and setting a new standard for tenant amenities.”

Work& has five Houston locations and several others in major metros, including New York, Austin, D.C., Boston, Chicago, San Francisco, and Miami. According to its website, the company will also introduce a Work&Wellbeing suite in New York.

Abbey Donnell spoke with InnovationMap on the Houston Innovators Podcast about why she founded the company and its plans for growth in 2021. Click here to learn more.