报告题目：Opportunities and Challenges in Photocatalysis

-How to Avoid Experimental Pitfalls

报告时间：2020年10月07日（星期三）上午9:30-11:00

报告地点：腾讯会议

会议ID: 946 087 456

报 告 人：Prof. Prashant V. Kamat（教授、美国圣母大学）

报告摘要:

In this lecture we will discuss early developments of photocatalysis and basic principles of photocatalytic reduction and oxidation processes. The focus in 1990s was to explore the photocatalysis for environmental remediation.  In recent years the focus has been photocatalytic hydrogen evolution and CO₂ reduction. A variety of photocatalysts have been explored in this context. Often researchers employ sacrificial electron donors to boost either reductive or oxidative processes. Sacrificial donors employed in the photocatalytic reduction are typically methanol, ethanol, i-propoanol, triethanolamine, formate, ascorbic acid, and EDTA, etc. These sacrificial donors are rich in carbon and hydrogen. However, oxidation of these compounds (for example, methanol) produces C₁ products as well as hydrogen, the details of which can be found elsewhere.^1,2  The oxidation of sacrificial donors often contributes to the products that are being considered as reduction products. Hence it becomes imperative to evaluate the fate of these sacrificial donors and their contributions to the overall yield of the products in a photocatalytic reaction and present a photocatalytic mechanism that involves both reduction and oxidation steps and proper identification of products. Ways to avoid experimental pitfalls in photocatalysis will be discussed.

References:

1. Schneider J.; Bahnemann, D. W. Undesired Role of Sacrificial Reagents in Photocatalysis J. Phys. Chem. Lett.2013, 4, 3479–3483.

（2）Kamat, P. V.; Jin, S. Semiconductor Photocatalysis: “Tell Us the Complete Story!”, ACS Energy Letters 2018, 3, 622-623.

报告人简介：

Prashant V. Kamat是美国圣母大学（University of Notre Dame）教授，ACS Energy Letters主编。