期刊
ADVANCED SCIENCE
卷 6, 期 18, 页码 -出版社
WILEY
DOI: 10.1002/advs.201900678
关键词
CO2 reduction; defect engineering; flame spray pyrolysis; formate; oxygen hole centers; oxygen vacancy; SnO2
资金
- Australian Research Council (ARC) [FL-140100081, DE170100375]
- UNSW Digital Grid Futures Institute, UNSW Sydney
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
- Materials Research Collaborative Access Team (MRCAT)
- DOE
- MRCAT member institutions
The large-scale application of electrochemical reduction of CO2, as a viable strategy to mitigate the effects of anthropogenic climate change, is hindered by the lack of active and cost-effective electrocatalysts that can be generated in bulk. To this end, SnO2 nanoparticles that are prepared using the industrially adopted flame spray pyrolysis (FSP) technique as active catalysts are reported for the conversion of CO2 to formate (HCOO-), exhibiting a FEHCOO- of 85% with a current density of -23.7 mA cm(-2) at an applied potential of -1.1 V versus reversible hydrogen electrode. Through tuning of the flame synthesis conditions, the amount of oxygen hole center (OHC; S O center dot) is synthetically manipulated, which plays a vital role in CO2 activation and thereby governing the high activity displayed by the FSP-SnO2 catalysts for formate production. The controlled generation of defects through a simple, scalable fabrication technique presents an ideal approach for rationally designing active CO2 reduction reactions catalysts.
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