Atomically Dispersed Transition Metals on Carbon Nanotubes with Ultrahigh Loading for Selective Electrochemical Carbon Dioxide Reduction
Top Cited Papers
- 9 February 2018
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 30 (13), e1706287
- https://doi.org/10.1002/adma.201706287
Abstract
Single-atom catalysts (SACs) are the smallest entities for catalytic reactions with projected high atomic efficiency, superior activity, and selectivity; however, practical applications of SACs suffer from a very low metal loading of 1–2 wt%. Here, a class of SACs based on atomically dispersed transition metals on nitrogen-doped carbon nanotubes (MSA-N-CNTs, where M = Ni, Co, NiCo, CoFe, and NiPt) is synthesized with an extraordinarily high metal loading, e.g., 20 wt% in the case of NiSA-N-CNTs, using a new multistep pyrolysis process. Among these materials, NiSA-N-CNTs show an excellent selectivity and activity for the electrochemical reduction of CO2 to CO, achieving a turnover frequency (TOF) of 11.7 s−1 at −0.55 V (vs reversible hydrogen electrode (RHE)), two orders of magnitude higher than Ni nanoparticles supported on CNTs.Keywords
Funding Information
- Australian Research Council (DP150102044, DP150102025, DP180100568)
- Australian Research Council (LE120100026)
- U.S. Department of Energy (DE‐AC02‐05CH11231)
- National Science Foundation (ACI‐1053575)
- National Natural Science Foundation of China (51521091)
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