陈诉题目:A Design Strategy Towards Oxygen Electrocatalysts
報告時間:2024年4月18號上午9點
報告地點:化資學院理化實驗樓321
主辦單位:化學化工與資源利用學院
报 告 人:刘彬 教授
報告摘要:
In this talk, I am going to summarize our recent progresses towards design of efficient oxygen electrocatalysts for various electrochemical energy conversion and storage applications. The design strategies include: 1. How to experimentally determine binding strength of reactive intermediates. 2. How to tune binding strength of reactive intermediates by surface engineering. 3. How to break the scaling relationship.
報告人簡介:

Bin Liu received his bachelor of engineering (1st Class Honours) and master of engineering degrees at the National University of Singapore, Singapore in 2002 and 2004, respectively, and completed his doctoral degree at the University of Minnesota, USA in 2011. After spending a year as postdoctoral fellow in the University of California Berkeley, USA, he joined School of Chemical and Biomedical Engineering at Nanyang Technological University as an Assistant Professor in June 2012 and was promoted to Associate Professor in March 2017. In February 2023, Professor Liu joined the Department of Materials Science and Engineering at City University of Hong Kong as a Global STEM Professor. His research focuses on photo(electro)catalysis and in-situ/operando characterization. Professor Liu was awarded emerging investigator by Journal of Materials Chemistry A, Royal Society of Chemistry in 2016, class of influential researchers by Industrial & Engineering Chemistry Research, American Chemical Society in 2018, and listed in the “Highly Cited Researchers” in Cross-Field in 2019 and Chemistry in 2020-2023 by Clarivate Analytics.
報告題目:光電化學要领認知實際光催化電子過程
報告時間:2024年4月18號上午10點
報告地點:化資學院理化實驗樓321
主辦單位:化學化工與資源利用學院
報告人:陳加藏教授
報告摘要:
在光催化反應中,光致界面電荷轉移與內部電荷複合之間的競爭對光子利用率起決定性作用。這些電子過程不僅與半導體和助催化劑的選取以及反應體系的組成直接相關,而且還與入射光強呈現非線性關系。因而,纵然對于既定的光催化體系,發生這些電子過程的動力學信息如時間常數展現出敏感的光強依賴性。對于目前常見的基于脈沖激光技術的研究要领,由于單位時間內撞擊催化劑的光子通量比實際光催化反應大4-10個數量級,因而難以映射出實際工況下的電子過程信息。基于此信息所形成的認知困擾著高性能光催化反應的設計。
最近,我們提出多通道開路電位監測等光電化學要领,讲明在實際光催化反應中,半導體—助催化劑界面電子轉移發生的亞秒-秒時間尺度,而光致空穴轉移和半導體內部電荷複合則發生在毫秒-秒時間尺度。基于所獲取的實際工況下光致電子過程動力學信息進行數值模擬,我們提出了高效光催化牢固床反應和疏散體系反應的設計方案,並在氫氣無損耗純化等技術領域開發出了可規模放大的反應器。
報告人簡介:
陳加藏,2011年7月畢業于中國科學院山西煤炭化學研究所並獲工學博士學位。先後在中科院山西煤化所、中科院上海矽酸鹽所、新加坡南洋理工大學、瑞士洛桑聯邦工學院從事半導體(光)電化學之電荷傳輸和界面電荷轉移的研究事情。2016-2023年在中科院山西煤化所任研究員、博導、課題組長。2024年1月入職杭州師範大學並擔任教授。陳加藏博士將多年來在半導體(光)電化學的理論基礎積累運用于光催化研究,並提出實際工況下發生光致電子過程的時間常數測試要领,同時在廢水處理、廢酸回用、氫氣純化等技術領域開展光催化反應器和反應工程的研究。目前在高鹽廢水低濃度汙染物礦化已經開發出了日處理十噸級廢水的光催化中試技術。