February 26, 2024

Decades in the Making – New Catalyst Could Make Hydrogen Fuel Cells Affordable

This substantial development, in the viewpoint of the researchers, will ultimately assist to totally understand the enormous potential of hydrogen fuel cells.
The commercialization of eco-friendly fuel has actually been stalled for decades by the high cost of platinum, but a study indicates that the affordable driver may be a feasible replacement.
For many years, researchers have actually been trying to find a driver that would considerably decrease the cost of producing hydrogen fuel cells.
A green energy transformation might result from such a development, with laptop computers and trains alike utilizing fuel that just produces water as a byproduct. Scientists might be getting closer to attaining this objective, according to current findings from the University at Buffalo (UB).
The U.S. Department of Energy (DOE) has actually identified effectiveness, resilience, and cost as the 3 primary goals for fuel cell research. In a research study that was recently released in Nature Energy, scientists describe how iron can be combined with nitrogen and carbon to produce a catalyst that satisfies all 3 requirements.

” This has actually been years in the making,” says the studys lead author Gang Wu, Ph.D., teacher of chemical and biological engineering at the UB School of Engineering and Applied Sciences. “We believe this is a substantial breakthrough that will eventually help let loose the incredible potential of hydrogen fuel cells.”
The guarantee of fuel cells
According to DOE, fuel cells run similarly to batteries but do not lose power or need recharging. They produce heat and power so long as fuel, such as hydrogen, is provided.
They have long intrigued scientists, environmentalists, and others due to the fact that they produce less or no emissions as compared to combustion engines. In addition, they have a broad variety of usages, including powering buildings, power plants, vehicles, and other systems.
However, the absence of widespread commercialization of fuel cells is due, amongst other things, to the high expense of the expensive catalysts required to accelerate crucial fuel cell procedures.
A set of six precious metals referred to as the platinum-group metals have actually revealed to be the most efficient catalysts. While these metals are effective and lasting, they are exceedingly costly due to their shortage. As an effect, scientists are searching for more economical options.
Overcoming barriers
One such option has actually been iron-based catalysts. Iron is appealing because it is low-cost and abundant. However it does not carry out in addition to platinum, especially due to the fact that it lacks the resilience to withstand the extremely destructive and oxidative environments inside fuel cells.
To conquer this barrier, the research team bonded 4 nitrogen atoms to the iron. Researchers then embedded the product in a few layers of graphene “with accurate atomic control of regional geometric and chemical structures,” Wu states.
The resulting structure is a significantly improved catalyst. For instance, the research team reported the catalyst:

Is believed to be the most effective iron-based driver produced to date, surpassing the DOEs 2025 target for electrical existing density.
Attained a durability rating that approaches platinum group drivers.

All this, Wu states, points to the iron-based catalysts potential to make fuel cells, particularly hydrogen fuel cells, a lot more affordable for business usage. Scientists are planning follow-up research studies to further improve the catalyst.
Reference: “Atomically dispersed iron sites with a nitrogen– carbon covering as long lasting and highly active oxygen reduction catalysts for fuel cells” by Shengwen Liu, Chenzhao Li, Michael J. Zachman, Yachao Zeng, Haoran Yu, Boyang Li, Maoyu Wang, Jonathan Braaten, Jiawei Liu, Harry M. Meyer III, Marcos Lucero, A. Jeremy Kropf, E. Ercan Alp, Qing Gong, Qiurong Shi, Zhenxing Feng, Hui Xu, Guofeng Wang, Deborah J. Myers, Jian Xie, David A. Cullen, Shawn Litster, and Gang Wu, 7 July 2022, Nature Energy.DOI: 10.1038/ s41560-022-01062-1.
In addition to UB, the collaborative research team consisted of members from the following organizations: Argonne National Laboratory; Carnegie Mellon University; Giner Inc.; Indiana University– Purdue University Indianapolis; Oak Ridge National Laboratory; Oregon State University; Purdue University; and the University of Pittsburgh.
The study was moneyed by the U.S. Department of Energy and the U.S. National Science Foundation. Wu and two co-authors have filed joint patent applications through the University at Buffalo and Giner Inc

A set of 6 precious metals known as the platinum-group metals have actually shown to be the most effective catalysts. As an effect, scientists are looking for less costly options.
One such alternative has been iron-based catalysts. Iron is appealing due to the fact that it is affordable and plentiful. It does not perform as well as platinum, specifically since it does not have the sturdiness to withstand the highly corrosive and oxidative environments inside fuel cells.