Embedding cubane [M4(OH)4] (M=Ni, Co) clusters within the matrix of metal–organic frameworks (MOFs) is a strategy to develop materials with unprecedented synergistic properties. Herein, a new material type based on the pore‐space partition of the cubic primitive minimal‐surface net (MOF‐14‐type) has been realized. CTGU‐15 made from the [Ni4(OH)4] cluster not only has very high BET surface area (3537 m2 g−1), but also exhibits bi‐microporous features with well‐defined micropores at 0.86 nm and 1.51 nm. Furthermore, CTGU‐15 is stable even under high pH (0.1 m KOH), making it well suited for methanol oxidation in basic medium. The optimal hybrid catalyst KB&CTGU‐15 (1:2) made from ketjen black (KB) and CTGU‐15 exhibits an outstanding performance with a high mass specific peak current of 527 mA mg−1 and excellent peak current density (29.8 mA cm−2) at low potential (0.6 V). The isostructural cobalt structure (CTGU‐16) has also been synthesized, further expanding the application potential of this material type.
Developing high-efficiency and cost-effective
electrocatalytic
oxygen evolution reaction (OER) catalysts would determine the future
distributions of energy conversion technologies. Metal–organic
frameworks (MOFs), with unsaturated active metal sites, functionalized
organic linkers, and large surface areas, are emerging heterogeneous
electrocatalysts for the water oxidation process. Herein, we report
an oxygen-evolving microporous (3,10)-connected Co6-based
MOF (denoted as CTGU-14) for the electrocatalytic OER. Moreover, the
integration of Co-MOF and SnO2, SnO2 (15%) &
CTGU-14 composite attains remarkable electrochemical OER performance
with a small Tafel slope of 68 mV·dec–1, a
positive overpotential of 388 mV at 10 mA·cm–2, and overall durability in an alkali medium. The superior OER activities
might be ascribed to more convenient electron transfer from the SnO2 additive to the electrode medium, effective surface area
and unsaturated active cobalt centers, and more beneficial delivery
for hydroxy radicals in the microporous Co-MOF skeleton in the process
of the OER.
Metal–organic frameworks (MOFs) incorporating different metal nanoparticles or conductive additives are expected to possess desirable catalytic performance.
Embedding cubane [M 4 (OH) 4 ]( M= Ni, Co) clusters within the matrix of metal-organic frameworks (MOFs) is as trategy to develop materials with unprecedented synergistic properties.Herein, anew material type based on the pore-space partition of the cubic primitive minimal-surface net (MOF-14type) has been realized. CTGU-15 made from the [Ni 4 (OH) 4 ] cluster not only has very high BET surface area (3537 m 2 g À1 ), but also exhibits bi-microporous features with well-defined micropores at 0.86 nm and 1.51 nm. Furthermore,CTGU-15 is stable even under high pH (0.1m KOH), making it well suited for methanol oxidation in basic medium. The optimal hybrid catalyst KB&CTGU-15 (1:2) made from ketjen black (KB) and CTGU-15 exhibits an outstanding performance with ahigh mass specific peak current of 527 mA mg À1 and excellent peak current density (29.8 mA cm À2 )a tl ow potential (0.6 V). The isostructural cobalt structure (CTGU-16) has also been synthesized,further expanding the application potential of this material type.
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