TY - JOUR
T1 - Defect Engineering in a Metal-Organic Framework System to Achieve Super-Protonic Conductivity
AU - Basu, Olivia
AU - Mukhopadhyay, Subhabrata
AU - Laha, Subhajit
AU - Das, Samar K.
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/8/9
Y1 - 2022/8/9
N2 - Controlled incorporation of missing-linker defect sites could be achieved in four sister metal-organic frameworks (MOFs) of MOF-808, namely, MOF-808 A-D via modulated synthesis. An impressive enhancement in proton conductivity is observed in these sister MOFs (increase from 10-3to 10-1S cm-1) as compared to a highly crystalline, low-in-defect variant of MOF-808. MOF-808 C, having optimized defect density, shows a proton conductivity of 2.6 × 10-1S cm-1at 80 °C and 98% relative humidity-the highest value reported to date for pure MOF-based proton conductors without extensive structural modifications. The introduction of defects induces super-protonic conductivity by modifying different properties, like porosity, water sorptivity, and acidity. Furthermore, an assembly of this super proton-conducting MOF with Pt-a versatile hydrogen evolution reaction (HER) catalyst, has been studied with the objective to influence the catalytic activity. This MOF-catalyst assembly was found to have lower overpotential requirements, owing to an increase in local acidity and efficient proton management around the catalyst.
AB - Controlled incorporation of missing-linker defect sites could be achieved in four sister metal-organic frameworks (MOFs) of MOF-808, namely, MOF-808 A-D via modulated synthesis. An impressive enhancement in proton conductivity is observed in these sister MOFs (increase from 10-3to 10-1S cm-1) as compared to a highly crystalline, low-in-defect variant of MOF-808. MOF-808 C, having optimized defect density, shows a proton conductivity of 2.6 × 10-1S cm-1at 80 °C and 98% relative humidity-the highest value reported to date for pure MOF-based proton conductors without extensive structural modifications. The introduction of defects induces super-protonic conductivity by modifying different properties, like porosity, water sorptivity, and acidity. Furthermore, an assembly of this super proton-conducting MOF with Pt-a versatile hydrogen evolution reaction (HER) catalyst, has been studied with the objective to influence the catalytic activity. This MOF-catalyst assembly was found to have lower overpotential requirements, owing to an increase in local acidity and efficient proton management around the catalyst.
UR - http://www.scopus.com/inward/record.url?scp=85135885512&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.2c00654
DO - 10.1021/acs.chemmater.2c00654
M3 - Article
AN - SCOPUS:85135885512
SN - 0897-4756
VL - 34
SP - 6734
EP - 6743
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 15
ER -
