Boucher, M. B., Kyriakou, G., Jewell, A. D., Lewis, E. A., Sykes, E. C. H., Baber, A. E., …Tierney, H. L. (2012). Isolated metal atom geometries as a strategy for selective heterogeneous hydrogenations. Science, 335(6073), 1209-1212. https://doi.org/10.1126/science.1215864