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Title: Efficient electrochemical reduction of CO2 to HCOOH over Sub-2 nm SnO2 quantum wires with exposed grain boundaries
Authors: Liu, Subiao
Xiao, Jing
Lu, Xue Feng
Wang, Jiong
Wang, Xin
Lou, David Xiong Wen
Keywords: Engineering::Chemical engineering
Issue Date: 2019
Source: Liu, S., Xiao, J., Lu, X. F., Wang, J., Wang, X., & Lou, D. X. W. (2019). Efficient electrochemical reduction of CO2 to HCOOH over Sub-2 nm SnO2 quantum wires with exposed grain boundaries. Angewandte Chemie International Edition, 58(25), 8499-8503. doi:10.1002/anie.201903613
Journal: Angewandte Chemie International Edition
Abstract: Electrochemical reduction of CO2 could mitigate environmental problems originating from CO2 emission. Although grain boundaries (GBs) have been tailored to tune binding energies of reaction intermediates and consequently accelerate the CO2 reduction reaction (CO2 RR), it is challenging to exclusively clarify the correlation between GBs and enhanced reactivity in nanostructured materials with small dimension (<10 nm). Now, sub-2 nm SnO2 quantum wires (QWs) composed of individual quantum dots (QDs) and numerous GBs on the surface were synthesized and examined for CO2 RR toward HCOOH formation. In contrast to SnO2 nanoparticles (NPs) with a larger electrochemically active surface area (ECSA), the ultrathin SnO2 QWs with exposed GBs show enhanced current density (j), an improved Faradaic efficiency (FE) of over 80 % for HCOOH and ca. 90 % for C1 products as well as energy efficiency (EE) of over 50 % in a wide potential window; maximum values of FE (87.3 %) and EE (52.7 %) are achieved.
ISSN: 1433-7851
DOI: 10.1002/anie.201903613
Rights: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Angewandte Chemie International Edition and is made available with permission of Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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