A method for combining platinum and lanthanum as an alloy to serve as a catalyst in the next generation of fuel cells that will improve their performance and slash their cost.
Researchers at Tsinghua University have devised a method for combining platinum and lanthanum as an alloy to serve as apublished in the journal, the team behind the development points out that up until now, the type of fuel cell most commonly used in a number of devices, from satellites to the Space Shuttle, has been the alkaline, whose invention dates back almost a century.
“So the hunt is on for an electrocatalyst that is low-cost, more resistant to degradation and thus stable over longer periods of time, while also delivering impressive current density—in other words, the amount of electrical current per unit of volume,” Siyuan Zhu, one of the authors of the paper, said in a media statement. “And so enabling us to keep the promise of the compactness of PEMFCs.
Late transition metals have, however, proven not to be immune to dissolution in the harsh, corrosive PEMFC environment. This not only results in steady declines in performance, but the dissolved metal further reacts with byproducts of the oxygen reduction reaction, causing uncontrollable damage to the entire system.But among early transition metals, there is one group that has so far been overlooked, rare earth elements.
This is why the Tsinghua researchers devised one for the preparation of an alloy between platinum and the REE lanthanum.
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