Insights into Dopant-Mediated Tuning of Silica-Supported Mo Metal Centers for Enhanced Olefin Metathesis

Uchagawkar, Anoop; Ramanathan, Anand; Zhu, Hongda; Chen, Linxiao; Hu, Yongfeng; Douglas, Justin; Mais, Marco; Kobayashi, Takeshi; Subramaniam, Bala

doi:10.1021/acscatal.4c01700

Title: Insights into Dopant-Mediated Tuning of Silica-Supported Mo Metal Centers for Enhanced Olefin Metathesis

Journal Article · 12 May 2024 · ACS Catalysis

DOI: https://doi.org/10.1021/acscatal.4c01700 · OSTI ID:2367351

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^[2]; Zhu, Hongda ^[1];

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^[4]; Douglas, Justin ^[1];

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University of Kansas, Lawrence, KS (United States)
University of Kansas, Lawrence, KS (United States); Chevron Phillips Chemical Co LLC., Bartlesville, OK (United States)
University of Akron, OH (United States)
University of Saskatchewan, Saskatoon, SK (Canada)
Ames Laboratory (AMES), Ames, IA (United States)

Here, we show that the electronic environment around active Mo centers supported on mesoporous silicates can be tuned by the addition of transition metals creating highly dispersed bimetallic catalysts that display enhanced activity for ethylene + 2-butene metathesis to propylene. The bimetallic catalysts are prepared by incorporating electrophilic Lewis acid metals (M) such as Nb, Ta, Zr, or Hf as dopant promoters into mesoporous KIT-6 supports using a one-pot sol–gel technique followed by impregnation of the Mo species. All the bimetallic Mo/M-KIT-6 catalysts display better activity than monometallic Mo/KIT-6 catalyst (28.7 ± 1.1 mmol (mol_{Mo ^s})^–1), with (Mo/Nb-KIT-6) catalysts exhibiting maximum propylene formation rates (54.2 ± 0.5 mmol (mol_{Mo ^s})^–1) at an identical Mo loading.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 2367351

Report Number(s):: IS-J--11,336

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 11 Vol. 14; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Insights into Dopant-Mediated Tuning of Silica-Supported Mo Metal Centers for Enhanced Olefin Metathesis

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