Affiliation:
1. Department of Chemical & Environmental Engineering Yale University New Haven CT 06520 USA
2. National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA
3. Innovation Partnership Building University of Connecticut 159 Discovery Dr. Storrs CT 06269 USA
Abstract
AbstractUse of single‐atom catalysts (SACs) has become a popular strategy for tuning activity and selectivity toward specific pathways. However, conventional SAC synthesis methods require high temperatures and pressures, complicated procedures, and expensive equipment. Recently, underpotential deposition (UPD) has been investigated as a promising alternative, yielding high‐loading SAC electrodes under ambient conditions and within minutes. Yet only few studies have employed UPD to synthesize SACs, and all have been limited to UPD of Cu. In this work, a flexible UPD approach for synthesis of mono‐ and bi‐metallic Cu, Fe, Co, and Ni SACs directly on oxidized, commercially available carbon electrodes is reported. The UPD mechanism is investigated using in situ X‐ray absorption spectroscopy and, finally, the catalytic performance of a UPD‐synthesized Co SAC is assessed for electrochemical nitrate reduction to ammonia. The findings expand upon the usefulness and versatility of UPD for SAC synthesis, with hopes of enabling future research toward realization of fast, reliable, and fully electrified SAC synthesis processes.
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2 articles.
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