Modulating Electronic Characteristics of Nickel Molybdate via an Effective Manganese-Doping Strategy to Enhance Oxidative Desulfurization Performance

Abstract

Modulating the electronic characteristics of catalysts plays a significant role in optimizing their catalytic activity. Herein, Mn-doped nickel molybdate (MNMO) nanorods are synthesized via replacing the partial Ni sites by the Mn element, engineering a bimetallic synergistic effect to enhance the activation of oxygen (O2). Compared with the extremely low catalytic activity of pristine nickel molybdate (NiMoO4), complete desulfurization can be achieved by MNMO under the same reaction conditions. Characterization results show that the electronic structure and surface atomic composition of pure NiMoO4 will be modulated owing to the introduction of Mn atoms, leading to the enhancement of the oxygen vacancy content and stronger O2 activation capacity. Besides, the optimized catalyst MNMO-20 also displays satisfactory cycle performance, and the sulfur removal of dibenzothiophene still maintains 96.1% after six times of recycling. The distinctive engineering strategy and simple synthesis method provide a new insight in designing and developing oxidative desulfurization catalysts with high stability and effectivity.

Single Mo Atoms Stabilized on High-Entropy Perovskite Oxide: A Frontier for Aerobic Oxidative Desulfurization

“…As shown in Figure 4A, the intensity of the EPR signal 4B), which is attributed to the oxygen vacancy of the bound single electron (VO + ) that resulted from surface defects of samples. 53,54 According to the above observations, Mo/HEPO-SAC exhibits higher Mo dispersion, more oxygen vacancies, and better redox properties than that of Mo/HEPO-IM and Mo/ LMO-SAC, which may be favorable for the ODS process of DBT. It has been well established that the activation of O 2 molecules is the key procedure in this ODS reaction.…”

Encapsulation of H4SiW12O40 into an Amide-Functionalized MOF: A Highly Efficient Nanocomposite Catalyst for Oxidative Desulfurization of Diesel Fuel

“…7 This method is economically and environmentally more efficient than HDS; besides, the resistant sulfur contaminants can be easily eliminated at low temperatures and pressures. 8 The efficacy of the ODS process is highly dependent on the use of the appropriate catalytic systems. In this context, the development of novel, efficient, robust, and recyclable catalysts for the ODS treatment of hydrocarbon fuels (diesel oil) has become a relevant research topic.…”

“…This superior polarity of the oxidized S-based products facilitates their selective elimination through ODS combined with an extraction or adsorption steps . This method is economically and environmentally more efficient than HDS; besides, the resistant sulfur contaminants can be easily eliminated at low temperatures and pressures . The efficacy of the ODS process is highly dependent on the use of the appropriate catalytic systems.…”

Boosting Catalytic Oxidative Desulfurization Performance over Yolk–Shell Nickel Molybdate Fabricated by Defect Engineering

“…Industrially, hydrodesulfurization as a traditional method is employed to remove aliphatic sulfides from the oil. , However, it should be carried out under high pressure and high temperature, which is undoubtedly not consistent with the recent carbon neutrality policies. Thus, extractive desulfurization, adsorptive desulfurization, and oxidative desulfurization (ODS) as supplementary technologies have been proposed to produce clean fuels. − Among them, ODS is regarded as one of the most promising technologies to achieve ultradeep desulfurization because of its inherent capability to effectively remove sulfur-containing substances under mild operation conditions.…”