TY - JOUR
T1 - Nanostructured Ru-Co@SiO2
T2 - Highly efficient yet durable for CO2 reforming of methane with a desirable H2/CO ratio
AU - Pang, Yijun
AU - Dou, Yixuan
AU - Zhong, Aihua
AU - Jiang, Wu
AU - Gu, Lingli
AU - Feng, Xinzhen
AU - Ji, Weijie
AU - AU, Chak Tong
N1 - Funding Information:
We greatly appreciate the financial support from NSFC (21173118, 21373110) and MSTC (2013AA031703).
Funding Information:
We greatly appreciate the financial support from NSFC ( 21173118 , 21373110 ) and MSTC ( 2013AA031703 ).
PY - 2018/4/5
Y1 - 2018/4/5
N2 - In this study, the nanostructured bimetallic Ru-Co catalysts (Ru-Co core particles of ca. 50 nm; SiO2 sell thickness of 6.1 nm, and nRu/nCo = 0.008) were fabricated through the hydrothermal (or impregnation) and modified Stöber processes. The developed catalysts were characterized by means of XRD, N2 sorption, TEM, XPS, TG-MS, and H2-TPR, and evaluated for CO2 reforming of methane to syngas, to establish a detailed structure-performance correlation. The strategy of catalyst design effectively reduced metal sintering at reaction temperatures. Uniform Ru distribution through a hydrothermal approach resulted in more direct Co-Ru interaction, which caused the Co-based cores rather coking- and oxidation-resistant, and induced a phase transformation of β-Co to α-Co under the reaction atmosphere, beneficial for the reaction. The silica shell porosity was modified by applying the CTAB and PVP surfactants in shell encapsulation. In terms of reaction temperature (700 °C), CH4 turnover frequency (84.3 s−1), H2/CO ratio (0.98), and carbon deposition rate (0.5 mgcoke gcat−1 h−1), the currently developed binary Ru-Co catalyst with uniform Ru distribution and improved SiO2 shell porosity is proved to be highly efficient yet durable with a desirable H2/CO ratio for the target reaction. In view of the unique features of catalyst material and the outstanding reaction performance on the basis of CH4 TOF, new insights into the Co-based catalyst for DRM are provided in the current work.
AB - In this study, the nanostructured bimetallic Ru-Co catalysts (Ru-Co core particles of ca. 50 nm; SiO2 sell thickness of 6.1 nm, and nRu/nCo = 0.008) were fabricated through the hydrothermal (or impregnation) and modified Stöber processes. The developed catalysts were characterized by means of XRD, N2 sorption, TEM, XPS, TG-MS, and H2-TPR, and evaluated for CO2 reforming of methane to syngas, to establish a detailed structure-performance correlation. The strategy of catalyst design effectively reduced metal sintering at reaction temperatures. Uniform Ru distribution through a hydrothermal approach resulted in more direct Co-Ru interaction, which caused the Co-based cores rather coking- and oxidation-resistant, and induced a phase transformation of β-Co to α-Co under the reaction atmosphere, beneficial for the reaction. The silica shell porosity was modified by applying the CTAB and PVP surfactants in shell encapsulation. In terms of reaction temperature (700 °C), CH4 turnover frequency (84.3 s−1), H2/CO ratio (0.98), and carbon deposition rate (0.5 mgcoke gcat−1 h−1), the currently developed binary Ru-Co catalyst with uniform Ru distribution and improved SiO2 shell porosity is proved to be highly efficient yet durable with a desirable H2/CO ratio for the target reaction. In view of the unique features of catalyst material and the outstanding reaction performance on the basis of CH4 TOF, new insights into the Co-based catalyst for DRM are provided in the current work.
KW - Bimetallic
KW - Cobalt
KW - Methane dry reforming
KW - Nano-structured catalyst
KW - Ruthenium
UR - http://www.scopus.com/inward/record.url?scp=85041912655&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2018.02.003
DO - 10.1016/j.apcata.2018.02.003
M3 - Journal article
AN - SCOPUS:85041912655
SN - 0926-860X
VL - 555
SP - 27
EP - 35
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -
