TY - JOUR
T1 - Restructuring Metal–Organic Frameworks to Nanoscale Bismuth Electrocatalysts for Highly Active and Selective CO2 Reduction to Formate
AU - Lamagni, Paolo
AU - Miola, Matteo
AU - Catalano, Jacopo
AU - Hvid, Mathias S.
AU - Mamakhel, Mohammad Aref H.
AU - Christensen, Mogens
AU - Madsen, Monica R.
AU - Jeppesen, Henrik S.
AU - Hu, Xin Ming
AU - Daasbjerg, Kim
AU - Skrydstrup, Troels
AU - Lock, Nina
PY - 2020/4
Y1 - 2020/4
N2 - Recently, a large number of nanostructured metal-containing materials have been developed for the electrochemical CO2 reduction reaction (eCO2RR). However, it remains a challenge to achieve high activity and selectivity with respect to the metal load due to the limited concentration of surface metal atoms. Here, it is reported that the bismuth-based metal–organic framework Bi(1,3,5-tris(4-carboxyphenyl)benzene), herein denoted Bi(btb), works as a precatalyst and undergoes a structural rearrangement at reducing potentials to form highly active and selective catalytic Bi-based nanoparticles dispersed in a porous organic matrix. The structural change is investigated by electron microscopy, X-ray diffraction, total scattering, and spectroscopic techniques. Due to the periodic arrangement of Bi cations in highly porous Bi(btb), the in situ formed Bi nanoparticles are well-dispersed and hence highly exposed for surface catalytic reactions. As a result, high selectivity over a broad potential range in the eCO2RR toward formate production with a Faradaic efficiency up to 95(3)% is achieved. Moreover, a large current density with respect to the Bi load, i.e., a mass activity, up to 261(13) A g−1 is achieved, thereby outperforming most other nanostructured Bi materials.
AB - Recently, a large number of nanostructured metal-containing materials have been developed for the electrochemical CO2 reduction reaction (eCO2RR). However, it remains a challenge to achieve high activity and selectivity with respect to the metal load due to the limited concentration of surface metal atoms. Here, it is reported that the bismuth-based metal–organic framework Bi(1,3,5-tris(4-carboxyphenyl)benzene), herein denoted Bi(btb), works as a precatalyst and undergoes a structural rearrangement at reducing potentials to form highly active and selective catalytic Bi-based nanoparticles dispersed in a porous organic matrix. The structural change is investigated by electron microscopy, X-ray diffraction, total scattering, and spectroscopic techniques. Due to the periodic arrangement of Bi cations in highly porous Bi(btb), the in situ formed Bi nanoparticles are well-dispersed and hence highly exposed for surface catalytic reactions. As a result, high selectivity over a broad potential range in the eCO2RR toward formate production with a Faradaic efficiency up to 95(3)% is achieved. Moreover, a large current density with respect to the Bi load, i.e., a mass activity, up to 261(13) A g−1 is achieved, thereby outperforming most other nanostructured Bi materials.
KW - bismuth electrocatalysts
KW - electrocatalysis
KW - formate production
KW - metal–organic frameworks
KW - selective CO reduction
UR - http://www.scopus.com/inward/record.url?scp=85083689755&partnerID=8YFLogxK
U2 - 10.1002/adfm.201910408
DO - 10.1002/adfm.201910408
M3 - Journal article
AN - SCOPUS:85083689755
SN - 1616-301X
VL - 30
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 16
M1 - 1910408
ER -