SBIR Phase II: Combinatorial Synthesis of Electrocatalysts for Ozone Production

SBIR 第二阶段：用于臭氧生产的电催化剂的组合合成

• 批准号: 0091446
• 负责人: Charles Tennakoon
• 金额: $ 50万
• 依托单位: Lynntech, Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-01 至 2004-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0091446&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Combinatorial; Synthesis

This Small Business Innovation Research (SBIR) Phase II project describes an innovative combinatorial approach to the discovery of new electrocatalysts for electrochemical ozone generation. Ozone is increasingly being used in water treatment, as a sanitizing agent in the food industry and is preferred over chlorine and its derivatives. Electrochemical ozone generation, where ozone is generated by electrolysis of water, can potentially offer several cost and process advantages over the conventional electrical discharge methods of ozone generation. However, existing methods for generating ozone electrochemically use electrodes, which offer low Faradaic (i.e., current) efficiencies and have limited materials stability. In Phase I, ozone electrocatalysts were screened using a combinatorial approach, and two novel electrocatalysts for ozone formation were identified. A new rapid screening approach was also devised and will be used to evaluate focussed combinatorial arrays in Phase II. Phase II will identify the precise stoichiometries of the new ozone electrocatalysts using the techniques pioneered in Phase I. The catalysts will then be synthesized on a macro scale and evaluated in ozone cells using existing ozone electrocatalysts as a benchmark. The catalysts identified during this project will enable a more cost-effective generation of ozone with applications in municipal water treatment, point-of-entry and point-of-use water treatment, food sanitation, medical waste treatment and medical sterilization. Ozone could also be utilized in the chemical industry as a replacement for chlorine in a variety of processes, e.g. paper and pulp bleaching.

这个小企业创新研究（SBIR）第二阶段项目描述了一种创新的组合方法来发现用于电化学臭氧生成的新电催化剂。 臭氧越来越多地用于水处理，作为食品工业中的消毒剂，并且优于氯及其衍生物。 电化学臭氧产生，其中臭氧通过水的电解产生，可以潜在地提供优于臭氧产生的常规放电方法的若干成本和工艺优点。 然而，现有的用于产生臭氧的电化学方法使用电极，其提供低法拉第（即，电流）效率并且具有有限的材料稳定性。 在第一阶段，臭氧电催化剂进行了筛选，使用组合的方法，并确定了两种新的臭氧形成的电催化剂。 还设计了一种新的快速筛选方法，并将用于评估第二阶段的聚焦组合阵列。第二阶段将使用第一阶段开创的技术确定新臭氧电催化剂的精确化学计量。 然后将在宏观尺度上合成催化剂，并使用现有的臭氧电催化剂作为基准在臭氧电池中进行评估。 该项目期间确定的催化剂将使臭氧的产生更具成本效益，并可应用于市政水处理、入口点和使用点水处理、食品卫生、医疗废物处理和医疗消毒。 臭氧还可用于化学工业，在各种工艺中作为氯的替代品，例如纸张和纸浆漂白。