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Catalyst Design for Electrochemical Oxygen Reduction toward Hydrogen Peroxide

机译：电化学氧还原对过氧化氢的催化剂设计

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摘要

Precise electrochemical synthesis under ambient conditions has provided emerging opportunities for renewable energy utilization. Among many promising systems, the production of hydrogen peroxide (H2O2) from the cathodic oxygen reduction reaction (ORR) has attracted considerable interest in past decades due to the increasing market demands and the vital role of ORR in the electrocatalysis field. This work describes recent advances in cathodic materials for H(2)O(2)synthesis from 2e(-)ORR. By using Pt as a stereotype, the tuning knobs are overviewed, including the intrinsic binding strength of oxygenated species, the intermediate diffusion path and the isolation of Pt-Pt ensembles that enable 2e(-)ORR pathway from 4e(-)total reduction. This knowledge is successfully applied to other transition metal systems and leads to the discovery of more efficient alloy catalysts with balanced improvement on both activity and selectivity. In addition, mesostructure engineering and heteroatoms doping strategies on carbon-based materials, which significantly boost the H(2)O(2)production efficiency as compared to intact carbon sites, are also reviewed. Finally, future directions and challenges of transferring developed catalysts from lab scale tests to pilot plant operations are briefly outlooked.
机译：环境条件下精确的电化学合成为可再生能源利用提供了新兴机会。在许多有前途的系统中，由于市场需求的增加和ORR在电过分析场中的orr至关重要的作用，来自阴极氧还原反应（ORR）的过氧化氢（ORR）的产生引起了相当大的兴趣。这项工作描述了来自2E（ - ）ORR的H（2）O（2）合成的H（2）O（2）的阴极材料的最新进展。通过使用Pt作为刻板印象，概述了调节旋钮，包括含氧物种的内在结合强度，中间扩散路径和Pt-Pt集成的分离，使得从4e（ - - ）总还原中可以实现2e（ - - ）ORR途径。该知识成功地应用于其他过渡金属系统，并导致更有效的合金催化剂，具有均衡改善的活性和选择性。此外，还综述了与完整碳位点相比，MesoStructure工程和杂种掺杂碳基材料上的策略，显着提高了H（2）O（2）的生产效率。最后，简要展开了从实验室规模试验到试验工厂操作转移到试验厂的发展催化剂的未来方向和挑战。

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