SBIR Phase II: Redox Polymer Catalysts for Electrochemical Synthesis of Hydrogen Peroxide

0078383 Gopal这个小企业创新研究第二阶段项目将研究氧化还原催化剂电极的使用，通过氧化还原催化剂的电化学再生合成过氧化氢。在第一阶段的研究中，开发了用于过氧化氢合成的催化剂，并成功地证明了它们的短期稳定性。10 cm~2电极槽的流动槽操作表明，在1N H_2SO_4的酸性条件下，以60%的电流效率制备过氧化氢，过氧化氢浓度可达2%。然而，第一阶段的工作表明，这些氧化还原体系的带氧催化电流很差，以及过氧化氢浓度的上限(2%)。第二阶段的研究工作将致力于通过改变制备程序、电极结构和制造技术来提高重还原催化剂的催化效果。这些电极将通过流动电池实验进行测试和优化，以用于使用氧气/空气和几乎纯水(如有必要，可调整pH)合成过氧化氢。将对电极进行长期稳定性测试(500小时)。大电流电极(100cm2)将使用最好的复合电极制造，用于长期稳定性测试和工艺优化。这项研究的潜在商业应用过氧化氢是一种清洁的氧化剂，它能反应生成水作为反应产物，因此在许多行业中都是环保可接受的。过氧化氢的市场预计在未来几年将增长近10%。这一第二阶段提案中描述的新技术(从水和空气中合成过氧化氢)可用于各种应用。这些领域包括废水处理、现场发电(用于工业和消费应用，如洗衣漂白剂等)，以及商业过氧化氢生产。

0078383Gopal This Small Business Innovation Research Phase II project will investigate the use ofredox catalyst electrodes for the synthesis of hydrogen peroxide through electrochemicalregeneration of the redox catalyst. In the Phase I research, catalysts were developed andtheir short-term stability for peroxide synthesis was successfully demonstrated. Flow celloperation with 10 cm2 electrode cells showed the preparation of hydrogen peroxide inacidic condition (1N H2SO4) at 60% current efficiency and up to 2% in peroxideconcentration. However, Phase I work indicated poor catalytic current with oxygen forthese redox systems, as well as an upper limit for hydrogen peroxide concentration (2%).Phase II research effort will be directed towards improving the catalytic effect of theseredox catalysts through changes in preparative procedures, electrode structure, andfabrication technique. The electrodes will be tested and optimized for peroxide synthesisusing oxygen/air and almost pure water (pH adjusted, if necessary) using flow cellexperiments. The electrodes will be tested for long-tem stability (500 hours). Largerelectrodes (100cm2 ) will be fabricated using the best composite electrode for long-termstability testing and process optimization. Commercialization of the process will becarried out with a Phase III partner upon the successful completion of Phase II work.Potential Commercial Application of the Research Hydrogen peroxide is a clean oxidant, which reacts to form water as its reaction product.It is therefore environmentally acceptable in many industries. The market for hydrogenperoxide is expected to grow by almost 10% for the next few years. New technology(synthesis of hydrogen peroxide from water and air) described in this Phase II proposalcould be implemented for various applications. These areas include wastewater treatment, on-site generation (for industrial and consumer application such laundry bleach etc.), as well as commercial peroxide production.