The new development enables Mazda to reduce the amount of platinum and palladium used in automotive catalysts by 70 to 90 percent. It does not result in any changes in the performance of purifying gas emissions and maintains the high durability of conventional catalysts. Single-nanotechnology is a technology that can control even smaller particles than nanotechnology.

In automotive catalysts, precious metals promote chemical reactions that purify exhaust gases on their surfaces. In conventional catalysts, the precious metals are adhered to a base material. Exposure to exhaust gas heat causes the precious metal to agglomerate into larger particles. This reduces the catalyst’s effective surface area and catalytic activity, which requires the use of a significant amount of precious metals to counter and maintain an efficient purification performance.

In order to increase the precious metal surface area, Mazda developed a new catalyst using its proprietary catalyst material structure and precious metal particles that are less than 5 nanometers (nm) in diameter. This is the first time that a catalyst material has been achieved that features single, nanosized precious metal particles embedded in fixed positions.
As a result, there is no agglomeration of the precious metal particles, and the amount of high-priced precious metals used in three-way catalytic converters - which purify gasoline-engine exhaust gases - can be reduced by 70 to 90 percent. Moreover, the new catalyst material will maintain the same level of purifying efficiency, with minimal deterioration over time even under the harshest operating conditions.

About Mazda Motor Corporation

Mazda Motor Corporation (TSE: 7261) started manufacturing tools in 1929 and soon branched out into production of trucks for commercial use. In the early 1960s, Mazda launched its first passenger car models and began developing rotary engines. Still headquartered in Hiroshima in western Japan, Mazda today ranks as one of Japan’s leading automakers, and exports cars to the United States and Europe for over 30 years. Overseas sales account for more than half of total turnover. Mazda has two main production sites in Japan and 19 overseas facilities. Overseas sites include joint ventures based in the United States, and in Thailand with Ford Motor Company, Mazda’s largest shareholder.