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Researchers have created a way to look inside fuel cells to see the chemical processes that lead them to breakdown.
Fuel cells could someday generate electricity for nearly any device that’s battery-powered, including automobiles, laptops, and cellphones. Typically using hydrogen as fuel and air as an oxidant, fuel cells are cleaner than internal combustion engines because they produce power via electrochemical reactions. Since water is their primary product, they considerably reduce pollution.
The oxidation, or breakdown, of a fuel cell’s central electrolyte membrane can shorten their lifespan. The process leads to formation of holes in the membrane and can ultimately cause a chemical short circuit. Engineers created the new technique to examine the rate at which this oxidation occurs with hopes of finding out how to make fuel cells last longer.
Using fluorescence spectroscopy inside the fuel cell, they are able to probe the formation of the chemicals responsible for the oxidation, namely free radicals, during operation. The technique could be a game changer when it comes to understanding how the cells break down, and designing mitigation strategies that would extend the fuel cell’s lifetime.
“If you buy a device—a car, a cell phone—you want it to last as long as possible,” says Vijay Ramani, professor of environment & energy at the School of Engineering & Applied Science at Washington University in St. Louis.


It’s been a busy summer for open access (OA) in Europe. On one hand, nationally coordinated efforts in places like Finland and Germany have sought (unsuccessfully so far) to pressure Elsevier into better subscription pricing and OA options. On the other hand, a group of early career researchers (ECRs) at the University of Cambridge are looking to mobilize fellow ECRs to embrace open models that are not controlled by commercial entities. In my view, these divergent approaches illustrate why we should focus our collective energies away from strategies in which commercial interests retain control under new economic conditions (see also, proposals to flip subscription payments to APCs), and towards working with ECRs and others who envision a return of scholarly dissemination responsibility to the academy.
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Minhua Shao is an associate professor at the Hong Kong University of Science and Technology, where he leads a research group pursuing work in advanced material and electrochemical energy technologies. Shao’s current work focuses on electrocatalysis, fuel cells, lithium-ion batteries, lithium-air batteries, CO2 reduction, and water splitting. Shao was recently named an associate editor of the
Over the summer, librarians and academic leaders in Germany came together to lead a push in taking down the paywalls that block access to so many scientific research articles. The initiative, named
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