TY - JOUR
T1 - Mechanistic study of non-thermal plasma assisted CO2 hydrogenation over Ru supported on MgAl layered double hydroxide
AU - Xu, Shanshan
AU - Chansai, Sarayute
AU - Shao, Yan
AU - Xu, Shaojun
AU - Wang, Yi chi
AU - Haigh, Sarah
AU - Mu, Yibing
AU - Jiao, Yilai
AU - Stere, Cristina E.
AU - Chen, Huanhao
AU - Fan, Xiaolei
AU - Hardacre, Christopher
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7/5
Y1 - 2020/7/5
N2 - Carbon dioxide (CO2) hydrogenation to value-added molecules is an attractive way to reduce CO2 emission via upgrading. Herein, non-thermal plasma (NTP) activated CO2 hydrogenation over Ru/MgAl layered double hydroxide (LDH) catalysts was performed. The catalysis under the NTP conditions enabled significantly higher CO2 conversions (∼85 %) and CH4 yield (∼84 %) at relatively low temperatures compared with the conventional thermally activated catalysis. Regarding the catalyst preparation, it was found that the reduction temperature can affect the chemical state of the metal and metal-support interaction significantly, and thus altering the activity of the catalysts in NTP-driven catalytic CO2 hydrogenation. A kinetic study revealed that the NTP-catalysis has a lower activation energy (at ∼21 kJ mol−1) than that of the thermal catalysis (ca. 82 kJ mol−1), due to the alternative pathways enabled by NTP, which was confirmed by the comparative in situ diffuse reflectance infrared Fourier (DRIFTS) coupled with mass spectrometry (MS) characterisation of the catalytic systems.
AB - Carbon dioxide (CO2) hydrogenation to value-added molecules is an attractive way to reduce CO2 emission via upgrading. Herein, non-thermal plasma (NTP) activated CO2 hydrogenation over Ru/MgAl layered double hydroxide (LDH) catalysts was performed. The catalysis under the NTP conditions enabled significantly higher CO2 conversions (∼85 %) and CH4 yield (∼84 %) at relatively low temperatures compared with the conventional thermally activated catalysis. Regarding the catalyst preparation, it was found that the reduction temperature can affect the chemical state of the metal and metal-support interaction significantly, and thus altering the activity of the catalysts in NTP-driven catalytic CO2 hydrogenation. A kinetic study revealed that the NTP-catalysis has a lower activation energy (at ∼21 kJ mol−1) than that of the thermal catalysis (ca. 82 kJ mol−1), due to the alternative pathways enabled by NTP, which was confirmed by the comparative in situ diffuse reflectance infrared Fourier (DRIFTS) coupled with mass spectrometry (MS) characterisation of the catalytic systems.
KW - CO hydrogenation
KW - DRIFTS
KW - Non-thermal plasma (NTP)
KW - Ru/MgAl layered double hydroxide (LDH)
UR - http://www.scopus.com/inward/record.url?scp=85079398678&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2020.118752
DO - 10.1016/j.apcatb.2020.118752
M3 - Article
AN - SCOPUS:85079398678
SN - 0926-3373
VL - 268
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 118752
ER -