Bioinspired Catalytic Reduction of Aqueous Perchlorate by One Single-Metal Site with High Stability against Oxidative Deactivation
作者:Changxu Ren、Jinyong Liu
DOI:10.1021/acscatal.0c05276
日期:2021.6.4
oxidative stress during ClO4– reduction, a synthetic catalyst needs a straightforward self-protective design. In this work, we introduced a methyl group on the ligand oxazoline moiety and achieved a substantial enhancement of catalyst stability without sacrificing the performance of ClO4– reduction. A suite of kinetics measurement, X-ray photoelectron spectroscopy characterization, reaction modeling, stopped-flow
用活性稳定的催化剂还原高氯酸盐 (ClO 4 – ) 对环境、能源和空间技术非常重要。然而,在惰性 ClO 4 –的限速氧原子转移 (OAT) 之后,活性更高的 ClO x – ( x ≤ 3) 中间体会导致催化剂失活。以前的 Re-Pd/C 催化剂含有 [Re V (O)( hoz ) 2 ] +位点 (H hoz = 2-(2'-羟基苯基)-2-恶唑啉) 并且容易还原 ClO 4 –,但 ClO x ——中间体导致 [Re VII (O) 2 ( hoz ) 2 ] + 的快速形成和水解。虽然微生物在 ClO 4 -还原过程中使用精密的酶促机制来承受氧化应激,但合成催化剂需要简单的自我保护设计。在这项工作中,我们在配体恶唑啉部分引入了一个甲基,在不牺牲 ClO 4 -还原性能的情况下显着提高了催化剂的稳定性。一套动力学测量、X 射线光电子能谱表征、反应建模、停流光电子能谱法和1H NM