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Toyota claims hydrogen fuel cell breakthrough

Platinum isn't cheap. And it's a necessary component of hydrogen fuel-cell technology. Which means that Toyota's recent discovery of a way to better analyze how platinum breaks down is a bit of an H2 vehicle breakthrough. Toyota worked with the Japan Fine Ceramics Center (JFCC) to observe nanometer-sized platinum particles and, specifically, how they deteriorate. Platinum is used as a catalyst for when electrons are stripped away from the hydrogen molecule to create an electrical charge and when hydrogen ions and electrons mix with oxygen to create water vapor. So, when platinum gets more course during the countless chemical reactions inside of fuel cells, things slow down. Now that Toyota says it's figured out a better way to observe this process, greater efficiency and durability within the fuel-cell process of electricity production are likely to follow, though more chemistry study will be needed to figure out how that will work. Still, it's topical because Toyota last year started producing the world's first production hydrogen fuel-cell vehicle. The Japanese automaker debuted sales of the Mirai fuel-cell vehicle in Japan late last year and plans to start selling the car in California this fall (the car will be priced at $57,500). Toyota also plans to boost Mirai production to about 2,000 units in 2016 from about 700 this year. Take a look at Toyota's documents and video below. R&D Breakthrough Sets Stage for More Efficient, Durable Fuel Cell Stacks Toyota City, Japan, May 18, 2015—A breakthrough in the real-time observation of fuel cell catalyst degradation could lead to a new generation of more efficient and durable fuel cell stacks. Toyota Motor Corporation and Japan Fine Ceramics Center (JFCC) have developed a new observation technique that allows researchers to monitor the behavior of nanometer-sized particles of platinum during chemical reactions in fuel cells, so that the processes leading to reduced catalytic reactivity can be observed. Platinum is an essential catalyst for the electricity-producing chemical reactions occurring between oxygen and hydrogen in fuel cell stacks. Reduced reactivity is the result of "coarsening" of platinum nanoparticles—a process whereby the nanoparticles increase in size and decrease in surface area. Up until now, however, it has not been possible to observe the processes leading to coarsening, making it difficult to analyze the root causes.

Toyota recalls 52k units of 2011-2012 Avalon for potential short circuit

Toyota is issuing a recall for roughly 52,000 examples of its 2011 and 2012 Avalon sedans in the US because a possible short circuit in the wiring for audio system's subwoofer may cause a fire. According to Toyota, it's possible for the subwoofer's wires to move out of position if contacted by cargo in the trunk. If one of the wires then contacts the metal frame of the speaker, it could trigger a short circuit. "If this occurs, the subwoofer could overheat, increasing the risk of a fire," according to the automaker. "There were two reports of thermal events – no outright fires," said Toyota spokesperson Cindy Knight to Autoblog. Toyota reports there are no reports of injuries, fatalities or crashes from this problem. Dealers will repair this problem at no cost, but until then, they will immediately disconnect the rear subwoofer as a precaution for owners. The recall notices will be sent out in mid-February, according to Knight. TOYOTA RECALLS CERTAIN 2011-2012 MODEL YEAR AVALON VEHICLES TORRANCE, Calif., January 28, 2015 – Toyota Motor Sales, U.S.A., Inc., today announced plans to conduct a safety recall of approximately 52,000 Model Year 2011-2012 Avalon sedans. In the involved vehicles, cargo could contact one of the audio system subwoofer wires located inside the trunk, and move the wire out of its normal position. If one of these wires contacts the metal frame of the subwoofer, it may result in an intermittent short circuit. If this occurs, the subwoofer could overheat, increasing the risk of a fire. Toyota is not aware of any crashes, injuries, or fatalities caused by this condition. Owners of the involved vehicles will receive a notification by first class mail. Toyota dealers will provide a repair for the audio system. Until the remedy is available, as a precaution, Toyota dealers will disconnect the rear subwoofer. Detailed information is available at www.toyota.com/recall and by calling Toyota Customer Service at 1-800-331-4331. ###

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Discussion Topics for Autoblog Podcast Episode #329
Subcompact sales slump, yet again