Drs. Min Liu and Yuanjie Pang, along with a team of graduate students and post-doctoral fellows in U of T Engineering, have developed a technique powered by renewable energies such as solar or wind. The catalyst takes climate-warming carbon-dioxide (CO2) and converts it to carbon-monoxide (CO), a useful building block for carbon-based chemical fuels, such as methanol, ethanol and diesel.
"CO2
The team's solution is sharp: they start by fabricating extremely small gold "nanoneedles" -- the tip of each needle is 10,000 times smaller than a human hair. "The nanoneedles act like lightning rods for catalyzing the reaction," says Liu.
When they applied a small electrical bias to the array of nanoneedles, they produced a high electric field at the sharp tips of the needles. This helps attract CO2, speeding up the reduction to CO, with a rate faster than any catalyst previously reported. This represents a breakthrough in selectivity and efficiency which brings CO2
Their work is published in the journal
"The field of water-splitting for energy storage has seen rapid advances, especially in the intensity with which these reactions can be performed on a heterogeneous catalyst at low overpotential -- now, analogous breakthroughs in the rate of CO2
"Solving global energy challenges needs solutions that cut across many fields," says Sargent. "This work not only provides a new solution to a longstanding problem of CO2
Story Source:
The above post is reprinted from
Journal Reference:
- Min Liu, Yuanjie Pang, Bo Zhang, Phil De Luna, Oleksandr Voznyy, Jixian Xu, Xueli Zheng, Cao Thang Dinh, Fengjia Fan, Changhong Cao, F. Pelayo García de Arquer, Tina Saberi Safaei, Adam Mepham, Anna Klinkova, Eugenia Kumacheva, Tobin Filleter, David Sinton, Shana O. Kelley, Edward H. Sargent.
Enhanced electrocatalytic CO2 reduction via field-induced reagent concentration. Nature, 2016; DOI:10.1038/nature19060
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