Cation doping driven performance optimization of MoS 2 nanoarrays for nitrate and sulfide co-electrolysis

作者：Miaosen Yang, Xianghua Hou, Rao Fu, Zhiwei Wang, Cejun Hu, Guangzhi Hu, Longchao Zhuo, Xijun Liu · 发表于：Nano Research · 年份：2025 · DOI：10.26599/nr.2025.94907778 · 被引用次数：32 · 研究领域：Electrocatalysts for Energy Conversion、Catalysis and Hydrodesulfurization Studies、Fuel Cells and Related Materials

Simultaneous nitrate reduction and sulfide oxidation reactions (NO 3 RR and SOR) to generate valuable chemicals represent an appealing strategy for green synthesis; however, the sluggish kinetics seriously hinder their application. Herein, we report that Ni dopants can optimize the electronic structure of MoS 2 , which thus favors the adsorption of reactants/intermediates and reduces the corresponding energy barriers. As a result, the designed catalyst shows a maximal Faradic efficiency of 88.4% and a corresponding yield rate of 66.7 μmol h ‒1 cm ‒2 for NH 3 synthesis, accompanied by a high robustness over 60 h. Besides, it can also trigger the SOR activity with a low potential of 0.105 V vs. RHE to produce 10 mA cm ‒2 , far smaller than that needed for conventional water oxidation (1.545 V vs. RHE). Accordingly, a coupling system with NO 3 RR and SOR is constructed for synchronous formation of value-added products on both anode and cathode. This work demonstrates an attractive attempt to construct advanced MoS 2 -based catalysts towards electrosynthesis.