Strategic Communications and Marketing News Bureau

Light-harvesting nanoparticle catalysts show promise in quest for renewable carbon-based fuels

CHAMPAIGN, Ill. — Researchers report that small quantities of useful molecules such as hydrocarbons are produced when carbon dioxide and water react in the presence of light and a silver nanoparticle catalyst. Their validation study – made possible through the use of a high-resolution analytical technique – could pave the way for CO2-reduction technologies that allow industrial-scale production of renewable carbon-based fuels. 

Portrait of researchers Dinumol Devasia and chemistry professor Prashant Jain

Graduate student Dinumol Devasia, left, and chemistry professor Prashant Jain led a study that confirms the formation of valuable multicarbon molecules and potential renewable fuels through carbon dioxide reduction reactions.

The study, led by University of Illinois Urbana-Champaign chemistry professor Prashant Jain, probes chemical activity at the surface of silver nanoparticle catalysts under visible light and uses carbon isotopes to track the origin and production of these previously undetected chemical reactions. The findings are published in the journal Nature Communications.

Sunlight-driven conversion of CO2 and water into energy-dense multicarbon compounds is a viable technology for renewable energy generation and chemical manufacturing. Because of this, researchers have been on the hunt for synthetic catalysts that facilitate large-scale CO2 reduction into multicarbon molecules, the study reports.

“Industrial-level catalytic chemical reactions are usually tested and optimized on the basis of the bulk profile of the final products,” Jain said. “But there are chemical species formed at the intermediate stages of such reactions, on the surface of the catalysts, that might be too scarce to detect and measure using conventional methods but are fundamental signifiers of how a catalyst functions.”

In the lab, Jain’s team used a specially outfitted Raman spectroscope to detect and identify single molecules formed at the surface of individual silver nanoparticles. By isolating a single nanoparticle on which the chemical reactions progress, the researchers can use a highly focused laser to excite molecules forming on the catalyst surface to create a spectral signal that identifies the molecules formed in discrete, elementary steps of the overall chemical process.

“I like to think of this work in terms of a story,” Jain said. “There is an overall theme to a story, which is the reduction of CO2. The main characters are CO2, H2O, silver nanoparticles, carbon monoxide and hydrogen ions, for example. But there are also some more minor but very interesting characters like butanol, acetate and oxalic acid that help tell the back story of the main characters. And sometimes, the minor characters are a lot more interesting than the major ones.”

Sometimes minor characters can come with some unintended players, Jain said. To ensure that the intermediate carbon-based molecules the researchers detected are a result of the CO2 reduction process and not contamination, they used CO2 containing only carbon-13 isotope, which makes up only 1.1% of the carbon on Earth.

“Using carbon-13 to trace the reaction pathways allowed us to confirm that any hydrocarbons measured were there as a result of the CO2 we intentionally added in the reaction vessel, and not accidentally introduced via contamination of the silver nanoparticles or later during the analysis process,” Jain said. “Carbon-13 is rare, so if we were to detect it in our reaction products, we would know it was the result of the light-driven conversion of CO2 and C–C bond formation.”

The scale of multicarbon molecule formation by using silver nanoparticle catalysts remains very small at this stage of the research, Jain said. However, researchers can concentrate on developing improved synthetic catalysts and scaling up for industrial production, now that the promise of light-harvesting nanoparticles has been revealed.

The National Science Foundation and the Energy and Biosciences Institute through the EBI–Shell program supported this study.

U. of I. graduate researcher Dinumol Devasia conducted the studies with contributions from former postdoctoral researcher Andrew J. Wilson, former graduate students Varun Mohan and Jaeyoung Heo. Jain also is affiliated with physics, the Materials Research Laboratory and the Beckman Institute for Advanced Science and Technology at Illinois.

Editor’s notes:

To reach Prashant Jain, call 217-333-3417; email jain@illinois.edu.  

The paper “A rich catalog of C–C bonded species formed in CO2 reduction on a plasmonic photocatalyst” is available online and from the Illinois News Bureau. DOI: 10.1038/s41467-021-22868-9.

Read Next

Humanities Diptych image with book cover of "The New Internationals" and a headshot of English professor David Wright Faladé

English professor’s novel tells of love triangle in post-WWII Paris, based on his family history

CHAMPAIGN, Ill. — A new novel by University of Illinois Urbana-Champaign English professor David Wright Faladé tells the story of three people in a love triangle in post-World War II Paris. The characters in “The New Internationals” — a young French woman who has survived the Holocaust, a university student from West Africa and a […]

Life sciences Portrait of the research team posing together.

Minecraft players can now explore whole cells and their contents

CHAMPAIGN, Ill. — Scientists have translated nanoscale experimental and computational data into precise 3D representations of bacteria, yeast and human epithelial, breast and breast cancer cells in Minecraft, a video game that allows players to explore, build and manipulate structures in three dimensions. The innovation will allow researchers and students of all ages to navigate […]

Arts Photo of seven dancers onstage wearing blue tops and orange or yellow flowing skirts. The backdrop is a Persian design.

February Dance includes works experimenting with live music, technology and a ‘sneaker ballet’

CHAMPAIGN, Ill. — The dance department at the University of Illinois Urbana-Champaign will present February Dance 2025: Fast Forward this week at Krannert Center for the Performing Arts. February Dance will be one of the first performances in the newly renovated Colwell Playhouse Theatre since its reopening. The performances are Jan. 30-Feb. 1. Dance professor […]

Strategic Communications and Marketing News Bureau

507 E. Green St
MC-426
Champaign, IL 61820

Email: stratcom@illinois.edu

Phone (217) 333-5010