4.7 Article

Titanosilicate zeolite supported Pt nanoparticles with electronic metal-support interactions for efficient methanol steam reforming

期刊

CATALYSIS TODAY
卷 382, 期 -, 页码 42-47

出版社

ELSEVIER
DOI: 10.1016/j.cattod.2021.05.015

关键词

Electronic metal-support interactions (EMSIs); Titanosilicate zeolite; Pt nanoparticles; Hydrogen production; Charge transfer

资金

  1. National Natural Science Foundation of China [21822203, 21932006, U1932119]
  2. Natural Science Foun-dation of Zhejiang Province [LR18B030002]
  3. National Key Basic Research Program of China [2017YFA0403402]
  4. Shanghai large Scientific facilities center

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This study demonstrates that utilizing titanosilicalite-1 (TS-1) zeolite as a support can efficiently accelerate methanol steam reforming reaction, increase hydrogen productivity, and stabilize Pt nanoparticles by modifying surface charge state, preventing sintering.
In situ release of hydrogen from liquid organic hydrogen carriers-such as methanol by steam reforming, offers a feasible way to potentially solve the problem of hydrogen storage and transport. Here we report that the titanosilicalite-1 (TS-1) zeolite support efficiently accelerates the Pt catalyzed methanol steam reforming (MSR), giving the hydrogen productivity at 639.7 mol(H2) mol(Pt)(-1) h(-1) at 250 degrees C, which steadily outperforms the Pt nanoparticles supported on other carriers, including ZSM-5 zeolite, amorphous SiO2, and TiO2 anatase. Further studies reveal that the electronic metal-support interactions (EMSIs) between Pt and TS-1 zeolite occurs, which modifies Pt nanoparticles surface charge state to accelerate the reaction. More importantly, the interactions could stabilize the Pt nanoparticles, achieving sinter-resistant Pt/TS-1 catalyst in the continuous MSR tests. This finding indicates the important role of heteroatoms in the zeolite framework for supported metal nanoparticles, which open a new way to guide the design of highly efficient heterogeneous catalysts in the future.

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