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Modulating Activity through Defect Engineering of Tin Oxides for Electrochemical CO2 Reduction
Daiyan R.a, Lovell E.C.a, Bedford N.M.a, Saputera W.H.a,b, Wu K.-H.a, Lim S.a, Horlyck J.a, Ng Y.H.c, Lu X.a, Amal R.a
a Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, 2052, Australia
b Department of Chemical Engineering, Institut Teknologi Bandung, Bandung, 40132, Indonesia
c School of Energy and Environment, City University of Hong Kong, Hong Kong
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimThe 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; SnO●) 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.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]CO2 reduction,Defect engineering,formate,Oxygen hole centers,SnO2[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]CO2 reduction,defect engineering,flame spray pyrolysis,formate,oxygen hole centers,oxygen vacancy,SnO2[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]R.D. and E.C.L contributed equally to this work. The authors would like to acknowledge the University of New South Wales Mark Wainwright Analytical Centre for their resources in doing the material characterization as well as Dr. Bill Gong for the XPS measurements. Further, authors gratefully acknowledge Dr. David Mitchell from the Electron Microscopy Centre at the University of Wollongong for his assistance with the HR-TEM. The work was supported by the Australian Research Council (ARC) under the Laurate Fellowship Scheme FL-140100081 and Discovery Early Career Researcher Award DE170100375 and funding from the UNSW Digital Grid Futures Institute, UNSW Sydney under a cross-disciplinary fund scheme. HE-XRD and XAS experiments were carried out at the 11-ID-B and 10-IB-B beamlines of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The 10-ID-B beamline was further supported by the Materials Research Collaborative Access Team (MRCAT), funded through by the DOE and the MRCAT member institutions. The authors would like to thanks Kevin Beyer for assistance with HE-XRD experiments and Joshua Wright for assistance with XAS experiments.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1002/advs.201900678[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]