Design of grain boundaries enriched nickel molybdate for enhanced catalytic oxidative desulfurization
Design of grain boundaries enriched nickel molybdate for enhanced catalytic oxidative desulfurization
复制标题
DOI：
10.1016/j.apcatb.2023.122779
复制
发表时间：
2023-04
期刊：
影响因子：
--
通讯作者：
Xin An;Wei Jiang;Linhua Zhu;Lingchao Xu;Junfeng She;Jing He;Wenshuai Zhu;Hua-ming Li
中科院分区：
文献类型：
--
作者：
Xin An;Wei Jiang;Linhua Zhu;Lingchao Xu;Junfeng She;Jing He;Wenshuai Zhu;Hua-ming Li
晶界（GB），一个有利的原子配置，可以提供高活性的表面，通过调节电子结构的催化剂。然而，由于结构变化大，难以精确设计，常被忽略。本文提出了一种新的富GB镍纳米晶（RGB-NMO）的制备方法。实验结果表明，优化后的表面形貌能提高活性中心的暴露率，有利于氧化脱硫反应的传质。此外，工程GB可以调节表面的原子组成和电子结构，导致过氧化氢活化能力的增加。利用这些特性，所合成的RGB-NMO不仅具有良好的脱硫效率，而且具有良好的循环稳定性。总之，该手稿提供了新的灵感，设计的功能材料，丰富的GB向优秀的ODS处理。
Grain boundaries (GB), a favorable atomic configuration, can provide highly active surfaces by modulating electronic structures in the catalysts. Whereas, it is usually be ignored owing to the large structural variations and the difficulty in its precise design. Herein, a novel strategy is proposed to prepare nickel molybdate with rich GB (RGB-NMO) via a facile one-step growth assisted by cetyltrimethylammonium bromide. Experimental results reveal that the optimized morphology can increase the exposure of active sites and facilitate the mass transfer during the oxidative desulfurization (ODS) reaction. Moreover, the engineered GB can modulate the surface atomic composition and electronic structure, leading to the increase of hydrogen peroxide activation capacity. Benefiting from these features, the synthesized RGB-NMO not only exhibits attractive desulfurization efficiency, but also shows a satisfactory cycling stability. Overall, this manuscript provides new inspirations for design of functional materials rich in GB towards excellent ODS treatment.