蔡启瑞讲座
报告题目：Catalysis in Particle-Stabilized Liquid Foams and Plastrons
报告时间：2025-07-02 10:30
报告人： Prof. Marc Pera-Titus
英国卡迪夫大学
报告地点：卢嘉锡楼202报告厅
转播地点：翔安校区能源材料大楼3号楼会议室3，漳州校区生化主楼307教室
报告摘要：
Gas-Liquid-Solid (G-L-S) catalytic reactions are ubiquitous in the chemical industry and environmental chemistry. The efficacy of these reactions is restricted by the low gas solubility in liquids and poor mass transfer of reactants/products to/from the catalyst surface due to the physical separation of the phases. Surfactants, co-solvents, high temperatures, and pressures are required to promote the gas-liquid-solid contact. However, these adversely affect the carbon footprint of the processes.
In this talk, I will first present a taxonomy of microstructured G-L-(S) interfaces to build microreactors (catalytic membrane contactors, microdroplets, micromarbles, microbubbles and particle-stabilized bubbles/foams), including Contact Electrocatalysis (CEC), that can accelerate G-L-S reactions. Within this taxonomy, I will provide a critical appraisal of surface-active catalytic particles to engineer particle-stabilized aqueous and oil foams. I will address the fundamental thermodynamics and dynamics aspects of particle adsorption at the G-L interface and examine foaming stabilization mechanisms. I will enumerate all possible interactions between particles and G-L interfaces and elucidate how the rational design of surfaceactive particles can assist their interfacial self-assembly and generate foams in a diversity of aqueous and solvents/reactants with different polarities and interfacial tensions. This includes amphiphilic catalysts based on Janus architectures with asymmetric wettability, and assemblies of two different surface-active particles favoring dispersion and adsorption at the G-L interface.
Based on these developments, I will show current developments of light-driven interfacial heaters based on foams relying on interfacial assemblies of catalytic and plasmonic surface-active particles. These smart microreactors promote localized heating near the catalytic centers allowing operation at near-room temperature while decreasing the required energy for operation by 50% compared to thermally heated reactions at isoconversion. I will also show examples of surface-active particles for the photosynthesis of H2O2 in aqueous foam and the electrosynthesis of formic acid from CO2 in the presence of CO2 foam and plastrons.
报告人简介：
Marc Pera-Titus教授是英国卡迪夫大学可持续催化化学系主任及国际事务主任，长期致力于催化、绿色化学及可持续能源转化领域的研究，于2021年成为英国皇家化学学会会士。Marc教授在催化剂材料的开发与工艺优化方面已发表140篇学术论文，并拥有19项专利。Marc教授于2007加入法国里昂环境催化研究所开展博士后工作，并于2008年晋升为法国国家科学研究中心研究员。自2011年至2020年，Marc教授在中国上海的E2P2L-CNRS联合实验室担任项目负责人、副主任，推动了工业与学术研究的深度融合。Marc教授的研究成果广受学术界认可，曾获得多个国际奖项，包括2007年的Rhône-Alpes基金会奖、2009年的《Elsevier》催化领域高引用作者奖、2016年和2017年获得中国发明协会银奖和金奖等。
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