Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
Department of Chemistry, Science & Learning Center, Whittier College, CA 90602, United States.
J Colloid Interface Sci. 2023 Oct 15;648:595-603. doi: 10.1016/j.jcis.2023.06.008. Epub 2023 Jun 8.
NO is a common water pollutant that can serve as a potential nitrogen source for electrocatalytic NH production. However, an efficient and complete removal of low NO concentrations remains a challenge. FeCu@MXene bimetallic catalysts were constructed on two-dimensional TiCT MXene carriers via a simple solution-based synthetic method and used for the electrocatalytic reduction of NO. The combination of the rich functional groups, high electronic conductivity on the MXene surface, and the synergistic effect between the Cu and Fe sites enabled the composite to effectively catalyse NH synthesis, with a 98% conversion of NO in 8 h and a selectivity for NH of up to 99.6%. In addition, FeCu@MXene showed excellent environmental and cyclic stability at various pH values and temperatures over multiple (14) cycles. Semiconductor analysis techniques and electrochemical impedance spectroscopy confirmed that the synergistic effect provided by the dual active sites of the bimetallic catalyst enabled fast electron transport. This study provides new insights into the synergistic promotion of NO reduction reactions using bimetals.
NO 是一种常见的水污染物，可作为电催化 NH3 生产的潜在氮源。然而，高效且完全去除低浓度的 NO 仍然是一个挑战。通过简单的基于溶液的合成方法，在二维 TiCT MXene 载体上构建了 FeCu@MXene 双金属催化剂，并将其用于电催化还原 NO。MXene 表面丰富的官能团、高导电性以及 Cu 和 Fe 位之间的协同作用使该复合材料能够有效地催化 NH3 的合成，在 8 h 内 NO 的转化率达到 98%，NH3 的选择性高达 99.6%。此外，FeCu@MXene 在不同 pH 值和温度下经过多次（14）循环后表现出优异的环境和循环稳定性。半导体分析技术和电化学阻抗谱证实，双金属催化剂的双活性位提供的协同效应促进了快速的电子传输。本研究为利用双金属协同促进 NO 还原反应提供了新的见解。
