التفاصيل البيبلوغرافية
| العنوان: |
Double-Site Doping of a V Promoter on Ni x ‑V-MgAl Catalysts for the DRM Reaction: Simultaneous Effect on CH 4 and CO 2 Activation |
| المؤلفون: |
Yao Lu (185912), Li Kang (494757), Dan Guo (199018), Yifan Zhao (659636), Yujun Zhao (216850), Shengping Wang (1519651), Xinbin Ma (1510072) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biochemistry, Ecology, Developmental Biology, Science Policy, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, DRM, hydroxide-derived Ni x, electron cloud density, CO 2 activation, Ni sites, CO 2, V-MgAl, CH 4, V promoter, form CH 3, catalyst, nonactivated multidentate carbonate, CO 2 activation ability, monodentate carbonate species, MgAl mixed-oxide support |
| الوصف: |
A series of V-doped layered double hydroxide-derived Ni x -V-MgAl catalysts were prepared and applied in the dry reforming of methane (DRM) reaction. The catalyst activity was enhanced with increasing amounts of a V promoter and was optimal at Ni/V = 10. Various characterizations showed that an appropriate amount of the V additive was doped in both the Ni sites and the MgAl mixed-oxide support. The addition of the V promoter not only improved the dispersion of Ni sites but also increased their electron cloud density. The activation energy of CH 4 cracking to form CH 3 and H species decreased from 72.1 kJ·mol –1 on pure Ni(111) to 37.1 kJ·mol –1 on V 0.50 Ni(111). Meanwhile, the adsorption and activation abilities of CO 2 were affected by the insertion of V species in the MgAl mixed-oxide support. In situ CO 2 infrared spectrometry verified that the addition of the V promoter inhibited the formation of nonactivated multidentate carbonate and significantly increased the content of the monodentate carbonate species, which was considered as the intermediate of CO 2 activation. Thus, the enhanced CO 2 activation ability of the Ni 10 -V-MgAl catalyst suppressed the generation of carbon deposits during the DRM reaction, thereby achieving excellent stability in long-term testing compared to undoped Ni-MgAl. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Double-Site_Doping_of_a_V_Promoter_on_Ni_i_sub_x_sub_i_V-MgAl_Catalysts_for_the_DRM_Reaction_Simultaneous_Effect_on_CH_sub_4_sub_and_CO_sub_2_sub_Activation/14899704 |
| DOI: |
10.1021/acscatal.1c01299.s001 |
| الاتاحة: |
https://doi.org/10.1021/acscatal.1c01299.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.C636DB5F |
| قاعدة البيانات: |
BASE |