期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 12, 页码 4030-4034出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201510599
关键词
hydrodesulfurization; nickel phosphides; selective hydrogenation; sulfur-containing layer
资金
- Natural Science Foundation of China [21173033, U1162203, 21473017]
- Fundamental Research Funds for the Central Universities [DUT13LK18]
- PetroChina Innovation Foundation [2014D-5006-0402]
- State Key Laboratory of Fine Chemicals [KF1306]
- Scientific Research Fund of Liaoning Provincial Education Department [L2013023]
Preparation of Ni2P by temperature-programmed reduction (TPR) of a phosphate precursor is challenging because the P-O bond is strong. An alternative approach to synthesizing Ni2P, by reduction of nickel hexathiodiphosphate (Ni2P2S6), is presented. Conversion of Ni2P2S6 into Ni2P occurs at 200-220 degrees C, a temperature much lower than that required by the conventional TPR method (typically 500 degrees C). A sulfur-containing layer with a thickness of about 4.7nm, composed of tiny crystallites, was observed at the surface of the obtained Ni2P catalyst (Ni2P-S). This is a direct observation of the sulfur-containing layer of Ni2P, or the so-called nickel phosphosulfide phase. Both the hydrodesulfurization activity and the selective hydrogenation performance of Ni2P-S were superior to that of the catalyst prepared by the TPR method, suggesting a positive role of sulfur on the surface of Ni2P-S. These features render Ni2P-S a legitimate alternative non-precious metal catalyst for hydrogenation reactions.
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