@article{c0fc7e9fce08495d84e1cc8dc52dc3ea,
title = "W@Ag dendrites as efficient and durable electrocatalyst for solar-to-CO conversion using scalable photovoltaic-electrochemical system",
abstract = "The electrochemical conversion of CO2 into CO using solar energy is the most efficient technique for artificial photosynthesis. However, many challenges remain, including the realisation of large-scale systems with high current density and stability. Herein, we report a carbon-supported tungsten-seed-based 3D silver dendrite (W@AgD) catalyst with abundant nanograin boundaries that exhibit enhanced CO2 reduction (CO2R) performance and stability. In zero-gap CO2 electrolyzer, W@AgD showed outstanding catalytic activity with a maximum CO partial current density of 400 mA cm–2 and stable operation for 100 h at 150 mA cm–2. The 3D dendrites improve CO2 mass transfer, while the abundant grain boundaries drive the AgxCyOz layer near the surface after activation, leading to superior CO2R catalytic activity owing to the strong local electric fields. In a stand-alone photovoltaic-electrochemical system, we achieved a solar-to-CO efficiency (ηSTC) of 12.1 % at 1 A. Thus, the synthesized catalyst and system are suitable for efficient solar energy storage.",
keywords = "Ag dendrites, Carbon monoxide, Electrochemical CO reduction reaction (CORR), Photovoltaic-electrochemical system, Solar to chemical conversion",
author = "Lee, {Woong Hee} and Chulwan Lim and Eunseo Ban and Soohyun Bae and Jongwon Ko and Lee, {Hae Seok} and Min, {Byoung Koun} and Lee, {Kwan Young} and Yu, {Jae Su} and Oh, {Hyung Suk}",
note = "Funding Information: This work was supported by institutional program grants (2E31241 and 2Z06370 20 231) from the Korea Institute of Science and Technology (KIST) and supported by “Carbon to X Project” (Project No. 2020M3H7A1098229) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea. We acknowledge Advanced Analysis Center at KIST for the SEM, XPS, FIB and ICP-MS measurements. We would also like to thank the 4D and 10C beamline at PAL for measuring the XPS and XAFS, respectively. Funding Information: This work was supported by institutional program grants ( 2E31241 and 2Z06370 20 231 ) from the Korea Institute of Science and Technology (KIST) and supported by “Carbon to X Project” (Project No. 2020M3H7A1098229) through the National Research Foundation (NRF) funded by the Ministry of Science and ICT , Republic of Korea. We acknowledge Advanced Analysis Center at KIST for the SEM, XPS, FIB and ICP-MS measurements. We would also like to thank the 4D and 10C beamline at PAL for measuring the XPS and XAFS, respectively. Publisher Copyright: {\textcopyright} 2021 The Author(s)",
year = "2021",
month = nov,
day = "15",
doi = "10.1016/j.apcatb.2021.120427",
language = "English",
volume = "297",
journal = "Applied Catalysis B: Environmental",
issn = "0926-3373",
publisher = "Elsevier",
}
