Mesoporous Silica Supported Pd-MnOxCatalysts with Excellent Catalytic Activity in Room-Temperature Formic Acid Decomposition.
For the application of formic acid as a liquid organic hydrogen carrier, development of efficient catalysts for dehydrogenation of formic acid is a challenging topic, and most studies have so far focused on the composition of metals and supports, the size effect of metal nanoparticles, and surface chemistry of supports. Another influential factor is highly desired to overcome the current limitation of heterogeneous catalysis for formic acid decomposition. Here, we first investigated the effect of support pore structure on formic acid decomposition performance at room temperature by using mesoporous silica materials with different pore structures such as KIE-6, MCM-41, and SBA-15, and achieved the excellent catalytic activity (TOF: 593 h-1) by only controlling the pore structure of mesoporous silica supports. In addition, we demonstrated that 3D interconnected pore structure of mesoporous silica supports is more favorable to the mass transfer than 2D cylindrical mesopore structure, and the better mass transfer provides higher catalytic activity in formic acid decomposition. If the pore morphology of catalytic supports such as 3D wormhole or 2D cylinder is identical, large pore size combined with high pore volume is a crucial factor to achieve high catalytic performance.
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.|Department of Chemical and Biological Engineering, Korea University Sungbuk-gu, Seoul 136-701, Republic of Korea.
Min-Ho
MH
Jin
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Duckkyu
D
Oh
Clean Fuel Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Ju-Hyoung
JH
Park
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Chun-Boo
CB
Lee
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Sung-Wook
SW
Lee
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Jong-Soo
JS
Park
Department of Chemical and Biological Engineering, Korea University Sungbuk-gu, Seoul 136-701, Republic of Korea.
Kwan-Young
KY
Lee
Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER) 152 Gajeongro, Yuseong, Daejeon 305-343, Republic of Korea.
Dong-Wook
DW
Lee
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