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所属单位：环境科学与工程学院

论文名称：In-situ exploitation of sulfur from petroleum coke in Ni@SC synthesis to Boost the De-/Hydrogenation performance of MgH2: Experimental and DFT study

发表刊物：Fuel

关键字：High-sulfur petroleum coke; Ni@SC; Catalyst; Hydrogen storage; MgH2; DFT

摘要：Catalytic improvement of the de-/hydrogenation properties of MgH2 by carbon materials loaded with metal sulfides has proved to be an effective strategy, but it suffers from additional sulfur sources, higher cost, and complexity. High-sulfur petroleum coke (HSPC), with a sulfur content exceeding 7 wt%, remains largely underutilized unless desulfurized. This study introduces an in-situ Ni@SC synthesis derived from HSPC without additional sulfur sources, which offers significant advantages in catalyzing MgH2, including cost-effectiveness and notable catalytic activity. Specifically, the MgH2-Ni@SC composite releases 5.18 wt% H2 at 275 °C within 60 min. It can uptake 1.84 wt% H2 within 60 min at 50 °C and absorb 4.54 wt% H2 in only 30 min at 150 °C. Moreover, the activation energies for de-/hydrogenation have been decreased to 92.12 and 25.17 kJ·mol−1, representing substantial progress among similar metal sulfide and Ni-based catalytic systems. These improvements result from the formation of Ni3S2, NiS2, and Ni multicomponents, with sulfur playing a non-negligible role in de-/hydrogenation. The result leverages the synergistic advantages of sulfur and carbon resources in HSPC, effectively addressing the cost and complexity issues associated with conventional catalyst synthesis of MgH2.

第一作者：Yunlin Huang

通讯作者：Jingcai Chang

全部作者：Yang Zhang,Xinan Zhang,Yiming Wang,Haoran Wu,Chunyan Xu,Chen Huang,Zuoli He

论文编号：1897579815069478914

一级学科：环境科学与工程

卷号：389

DOI码：10.1016/j.fuel.2025.134568

字数：7

是否译文：否

发表时间：2025-06

收录刊物：SCI

发布时间：2025-03-31