Non-copper catalysts are seldom reported to generate C2+ products, and the e cient over these catalysts were low. In this work, we reported an iron-based catalyst centered in nitrogen doped γ-Fe2O3 (xFe2O3-N), which yielded C2H6 as major product in H-cell. At -2.0 V vs Ag/Ag+, the Faradaic e ciency (FE) for ethane reaches 42% with current densities of 32 mA cm−2. This is the rst report about selective CO2 reduction to ethane (C2H6) over iron-based catalyst. Results showed that catalyst possessing FeO1.5-nNn sites enriched with oxygen vacancies was bene cial for the stabilization of *COOH intermediate. The exposure of two adjacent surfaces of Fe atoms was conducive to lower the energy barrier for C−C coupling over FeO1.5-nNn sites, facilitating the generation of C2H6. This work provides a strategy for design of novel iron-based catalyst with tunable local coordination and electronic structures for converting CO2 into C2 products in CO2RR.
Full TextElectrocatalytic reduction of CO 2 under ambient conditions using renewable energy has emerged as an attractive way to maintain carbon balance, which is regarded as one of the cleanest and e cient approaches 1-3 . Recently, numerous electrocatalysts have been developed for CO 2 reduction reaction (CO 2 RR) 4-7 . However, the majority of these catalyst systems have low e cient for multicarbon (C 2+ ) products due to the multiple pathways involved in the reaction process 8 . Cu-based catalysts are mostly reported to convert CO 2 into C 2+ products such as ethylene, alcohols and acetic acid [9][10][11] . Up to now, noncopper catalysts are rarely reported to generate C 2+ products 12,13 .
Herein, we successfully loaded Ru nanoparticles onto TiO2 nanosheet catalyst, which could exhibit highly efficient catalytic activity during the conversion of levulinic acid to γ-valerolactone at mild condition.
The
application of metal–organic frameworks (MOFs) in catalysis
is largely restricted by their intrinsic properties, thus the development
of modified MOFs is promising for improving the activities. Here,
we propose the formation of Ru-coordinated MOF with a hierarchically
meso- and microporous structure by a supercritical fluid route. Such
a photocatalyst has the preferable electronic structure, improved
visible-light adsorption ability, and high porosity for facilitating
mass transport. Owing to these combined advantages, the as-synthesized
Ru-coordinated MOF catalyst exhibits outstanding photocatalytic activity
for hydrogen production, which is much higher than those of the pure
MOF and the Ru nanoparticle-loaded MOF. This study opens up new opportunity
for improving the catalytic performances of MOFs by modifying their
microstructures through a supercritical fluid route.
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