题 目：New Routes of Ammonia Synthesis and Decomposition

报告人：Ib Chorkendorff　教授

单 位：Technical University of Denmark

时 间：2024/10/25　11:00

地 点：嘉锡楼三层大会议室（305）

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附简介：

报告人简介：Ib Chorkendorff 是丹麦技术大学物理系多相催化教授。他于 1985 年在丹麦欧登塞大学获得博士学位，在美国匹兹堡大学做博士后后，于 1987 年在丹麦技术大学任职，并于 1999 年成为正教授。2005 年至 2016 年，他担任丹麦国家研究基金会单个纳米粒子功能中心（CINF）主任，2016 年起担任维卢姆可持续燃料与化学品科学中心（V-SUSTAIN）主任。他于 2001 年当选为丹麦技术科学院院士，2018 年成为丹麦皇家科学与文学院院士。他撰写或合著了 450 多篇科学论文、23 项专利和一本教科书《现代催化与动力学概念》。自2017 年以来，他一直被列为高被引研究员（ISI）（该领域前 1%）。Ib Chorkendorff 的研究活动集中在寻找新的催化剂，以改善可持续能源生产 / 转化和环境保护。他是三家初创公司 RENCAT APS、HPNOW APS 和 Spectroinlets APS 的联合创始人，并获得了众多奖项，近期的奖项是 2021 年维卢姆・坎・拉斯穆森年度奖，这是丹麦最负盛名的奖项，以及 2022 年埃尼奖：能源前沿奖。

Activating molecular nitrogen is an extremely important process as it supplies, in the form of fertilizer, the nitrogen that is a prerequisite for building all amino acids and nucleic acids essential for life. Ammonia is also considered being an energy vector for storing energy over longer time. It shall be motivated why an alternative route to the current thermal ammonia synthesis route – the commercial Haber-Bosch process - could be attractive in a decentralized electrified society. This will be extended to new routes of promotion of thermal ammonia synthesis (and decomposition) showing how cobalt can also be made very active.1 The active site will be identified by a combination of cobalt single crystals with and without steps combined with reaction over mass-selected nanoparticles made in situ by a cluster source2. We shall also discuss the briefly the cracking of ammonia for making it useable for the shipping industry3. In the second part, we shall turn to electrochemical ammonia synthesis where we now have shown how one can make ammonia at ambient conditions. The Li-mediated process will be discussed, and we will show how we over the last 5 years have gone from having a process that did only make very little ammonia3 to now being capable of obtaining more than 80% Faradaic efficiency and high current densities.4,5 The scale-up approach will be discussed making grams of ammonia just as characterization of in situ measurements of the dynamic assembly of the solid electrolyte interface (SEI) layer - known from the Li batteries field - is formed, controlling the transport processes.6 Despite excellent recent progress there are still substantial outstanding questions concerning energy efficiency which will also be discussed7,8. References [1]Cao, V.,. I. Chorkendorff, J. K. Nørskov, Nature Comm. 13 (2022) 2382. DOI:10.1038/s41467-022-30034-y. [2]K. Zhang, ….J. K. Nørskov, I. Chorkendorff, , Science (2024) DOI: 10.1126/science.adn0558. [3]Gunnarson,…..I. Chorkendorff, Accepted Energy and Environnenetal Science (2024). [4]S. Z. Andersen,… J. K. Nørskov I. Chorkendorff, Nature, 570 (2019) DOI: 10.1038/s41586-019-1260-x [5]X. Fu, ... J. K. Nørskov, and I. Chorkendorff, Science 379 (2023) 707-712. DOI: 10.1126/science.adf4403 [6]S. Li, …. J. K. Nørskov, and I. Chorkendorff, Nature (2024). DOI:10.1038/s41586-024-07276-5 [7]N. H. Deissler,‚.. I. Chorkendorff Energy & Environmental Science (2024) DOI: 10.1039/D3EE04235A [8]S. Li, X. Fu, J. K. Nørskov, I. Chorkendorff, Accepted Nature Energy (2024).

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报告网页链接如下：Ib Chorkendorff教授学术报告链接