Stable and efficient chlorine evolution reaction with atomically dispersed Ru on surface tensile strained TiO2

Applied Catalysis B: Environment and Energy Pub Date : 2024-07-30 DOI:10.1016/j.apcatb.2024.124456

Amol R. Jadhav, Xinghui Liu, P. Silambarasan, Vinit Kanade, Yang Liu, Ta Thi Thuy Nga, Taehun Yang, My Tran Kim, Yeonsu Han, Taesung Kim, Xiaodong Shao, Chunyi Zhi, Chung-Li Dong, Hyoyoung Lee

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Abstract

Developing highly efficient and selective electrocatalysts for the chlorine evolution reaction (CER) in the chloralkali industry is of great importance. Here, we report the discovery of a new electrocatalyst for CER consisting of atomically dispersed Ru sites on surface tensile strained TiO (Ru-S-TiO). The single-atom Ru species were stabilized on the strained TiO surface by strong metal-support interactions. The Ru-S-TiO is highly efficient, initiating CER at only 5 mV above the E, and has shown excellent stability for over 100 hours. It exhibited >95 % CER selectivity even in acidic media with low Cl concentrations (0.2 M). Our results demonstrate that the strong metal-support interactions between the atomically dispersed Ru species and the strained TiO surface are crucial for the high catalytic activity, selectivity, and stability of Ru-S-TiO for CER. Ru-S-TiO holds great promise as a viable alternative to existing mixed metal oxides-based electrocatalysts for CER in the chloralkali industry.

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表面拉伸应变二氧化钛上原子分散的 Ru 发生稳定高效的氯进化反应

为氯碱工业中的氯进化反应（CER）开发高效、高选择性的电催化剂具有重要意义。在此，我们报告了一种新型 CER 电催化剂的发现，该催化剂由原子分散在表面拉伸应变 TiO（Ru-S-TiO）上的 Ru 位点组成。单原子 Ru 物种通过强大的金属支撑相互作用稳定在拉伸应变 TiO 表面。Ru-S-TiO 具有很高的效率，只需在 E 值以上 5 mV 就能引发 CER，而且在 100 多个小时内都表现出极佳的稳定性。即使在 Cl 浓度较低（0.2 M）的酸性介质中，它的 CER 选择性也大于 95%。我们的研究结果表明，原子分散的 Ru 物种与应变 TiO 表面之间强烈的金属支撑相互作用是 Ru-S-TiO 对 CER 具有高催化活性、选择性和稳定性的关键。Ru-S-TiO 很有希望成为氯碱工业中现有的基于混合金属氧化物的 CER 电催化剂的可行替代品。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Applied Catalysis B: Environment and Energy

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