Jung, Kyung Bin Lee, Jinho Ha, Jeong-Myeong Lee, Hyunjoo Suh, Dong Jin Jun, Chul-Ho Jae, Jungho 2024-01-19T23:02:08Z 2024-01-19T23:02:08Z 2021-09-03 2018-04-01 0920-5861 https://pubs.kist.re.kr/handle/201004/121498 We have previously shown that an activated carbon-supported ruthenium catalyst promoted with ReOx (RuRe/AC) is highly active for the hydrodeoxygenation (HDO) of lignin-derived phenols (e.g., guaiacol). In this work, we have investigated the effect of carbon supports on the structure and HDO activity of bimetallic RuRe particles using three different carbon supports, i.e., activated carbon (AC), carbon black (Vulcan carbon, VC), multi-walled carbon nanotube (MWCNT). The MWCNT- and VC-supported catalysts show remarkably enhanced activity and hydrocarbon selectivity for the HDO of a range of phenolic molecules (i.e., guaiacol, eugenol, benzyl phenyl ether) compared to RuRe/AC. STEM-EDS and XPS analyses reveal that bimetallic RuRe particles are more common than monometallic Ru or Re particles in the VC- and MWCNT-supported catalysts, and hexavalent rhenium species are more easily reduced to tetravalent rhenium during the HDO reactions in these catalysts, suggesting that Ru and Re in close proximity are required for the efficient hydrogenolysis of phenols. The formation of bimetallic particles on the AC surface is likely hindered by high microporosity and high surface oxygen functionalities, both of which restrict the mobility of Re and Ru for assembly. English ELSEVIER SCIENCE BV AQUEOUS-PHASE HYDRODEOXYGENATION C-O BOND M-CRESOL MESOPOROUS CARBON PYROLYSIS OIL FE CATALYSTS GUAIACOL HYDROGENATION PD ACID Effective hydrodeoxygenation of lignin-derived phenols using bimetallic RuRe catalysts: Effect of carbon supports Article 10.1016/j.cattod.2017.07.027 1 CATALYSIS TODAY, v.303, pp.191 - 199 CATALYSIS TODAY 303 191 199 scie scopus 000425175700028 2-s2.0-85028324995 Chemistry, Applied Chemistry, Physical Engineering, Chemical Chemistry Engineering Article; Proceedings Paper AQUEOUS-PHASE HYDRODEOXYGENATION C-O BOND M-CRESOL MESOPOROUS CARBON PYROLYSIS OIL FE CATALYSTS GUAIACOL HYDROGENATION PD ACID Lignin Hydrodeoxygenation Bimetallic RuRe Carbon