In situ preparing defect-rich molybdenum trioxide anchored on cobalt-embedded porous carbon nanosheets for efficient oxidative desulfurization of model fuel,Separation and Purification Technology

当前位置： X-MOL 学术 › Sep. Purif. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

In situ preparing defect-rich molybdenum trioxide anchored on cobalt-embedded porous carbon nanosheets for efficient oxidative desulfurization of model fuel
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2024-12-19 , DOI: 10.1016/j.seppur.2024.131205
Peng Zuo, Fanfan Liu, Weiqiang Zhang, Xiaojie Yin, Nannan Wang, Yan Mei, Xiaowei fang, Ping Qi, Kewei Chen, Zhiwei Zhang, Yun Shen, Jinyun Liu, Yefeng Liu

Transition metal oxides (TMOs) are ideal catalyst candidates for oxidative desulphurisation (ODS) reactions, where electron transfer between TMOs and their carriers significantly influences the catalytic performance in ODS. Herein, a simple synthesis method was developed to successfully anchor oxygen vacancy-rich MoO₃ (v_o-MoO₃) onto Co, N-codoped porous carbon nanoplates (CoPNC), forming the MoO₃/CoPNC-400 catalyst. In ODS with H₂O₂ as a green oxidant, the catalyst achieved excellent performance. Under conditions with a molar ratio of n(H₂O₂)/n(S) of 3, a reaction temperature of 60 °C, and a catalyst dosage of 0.05 g, complete desulfurization of 4000 ppm DBT model oil occurred within 30 min, maintaining stable ODS performance over twelve reaction cycles. The exceptional catalytic performance can be attributed to the catalyst’s unique bubble-like porous structure, which increased active site accessibility and promoted mass transfer during ODS. Further, the electron-rich CoPNC support facilitated electron transfer to v_o-MoO₃, weakened Mo–O bonds, and improved the dispersion of v_o-MoO₃ particles. Furthermore, radical experiments and electron paramagnetic resonance (EPR) analyses revealed that the ODS mechanism in the MoO₃/CoPNC-400 catalyst primarily involves hydroxyl (OH) radicals.

更新日期：2024-12-20

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南