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Gold-Based Catalysts for Hydrogen Processingand Fuel Cell Systems

机译：用于氢气处理和燃料电池系统的金基催化剂

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Recent innovative research suggests that new gold-based catalysts could be effectively employed in hydrogenrnprocessing and related fuel cell systems. The removal of carbon monoxide impurities from the hydrogen feedstockrnconsumed by fuel cells is the most probable first use for gold catalysts in this industry. This hydrogen is usuallyrnobtained by reforming hydrocarbon fuels, including methanol, from either free-standing plant or an on-board reformerrnin a vehicle. The absence of carbon monoxide would enable fuel cells to exhibit longer lifetimes and improvedrnefficiency. The effectiveness of gold catalysts in this application has already been demonstrated. Preferential oxidationrnof carbon monoxide in hydrogen-rich reformer gas is best effected by a gold catalyst (Au/α-Fe2O3) which isrnsignificantly more active than the commercial PROX catalyst, ie Pt/γ-Al2O3, currently used for this purpose. Thernprincipal hydrogen / oxygen fuel cell reaction is also catalysed by gold, at operational temperatures higher than thosernrequired for the oxidation of carbon monoxide in hydrogen streams.rnResearch has also shown that supported gold catalysts are very active in the water gas shift reaction used for producingrnhydrogen from carbon monoxide and water. It has been demonstrated that Au/α?Fe2O3 catalyst is more active than bothrnthe α?Fe2O3 support and the CuO/ZnO catalyst currently used commercially and is also active at lower temperatures.rnDeposition-precipitation preparation of Au/Fe2O3 and Au/TiO2rnproduces more active catalysts than by conventionalrncoprecipitation.rnAs well as their promising technical performance, the relatively low stable price and greater availability of goldrncompared with the platinum group metals is added justification for exploiting gold catalyst technologies. Thernemployment of gold catalysts could contribute to a welcome reduction in the size and capital cost of hydrogenrnprocessing equipment for fuel cell systems.rnLatest details of World Gold Council and European Commission supported research that will underpin the future use ofrngold catalysts in hydrogen processing, fuel cells and other important commercial applications are also reported.
机译：最近的创新研究表明，新的金基催化剂可以有效地用于氢处理和相关的燃料电池系统中。从燃料电池消耗的氢气原料中去除一氧化碳杂质是该行业中金催化剂最有可能的首次使用。通常通过重整自立式设备或车辆上的车载重整器重整包括甲醇在内的碳氢燃料来获取氢。一氧化碳的缺乏将使燃料电池具有更长的寿命和更高的效率。金催化剂在该应用中的有效性已经得到证明。富氢重整气体中的一氧化碳优先氧化最好通过金催化剂（Au /α-Fe2O3）进行，该催化剂的活性比目前用于此目的的商业PROX催化剂即Pt /γ-Al2O3活性高得多。主要的氢/氧燃料电池反应也由金催化，其操作温度高于氢气流中一氧化碳氧化所需的工作温度。研究还表明，负载型金催化剂在用于生产氢的水煤气变换反应中非常活跃。一氧化碳和水。事实证明，Au /α？Fe2O3催化剂比目前市售的α？Fe2O3载体和CuO / ZnO催化剂更具活性，并且在较低的温度下也具有活性.rn / Au / Fe2O3和Au / TiO2的沉积沉淀法制备的产物更多活性催化剂比常规的共沉淀法具有更好的技术性能。与铂族金属相比，相对较低的稳定价格和更高的金利用率为开发金催化剂技术增加了理由。金催化剂的使用可能有助于减少用于燃料电池系统的氢处理设备的尺寸和资本成本。世界黄金理事会和欧盟委员会的最新细节支持了研究，这些研究将为未来在氢处理，燃料电池和燃料电池中使用金催化剂提供支持。还报道了其他重要的商业应用。

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