Figure S1. HRTEM (a), mapping EDS (b), and TEM micrograph and size distribution (c) of Pt mother clusters prepared by rapid injection of NaBH4 (1.32mM, RPVP=100).
Figure S2. The NaOH amount -time curve for glucose oxidation over “top Au atoms supported on Pt clusters” catalyst prepared by replacement reaction (CJ-2) and a fit straight line for determining TOF (Glucose/Au=36500, mol ratio; O2: 100ml/min; about 0.0020g catalyst was used for evaluation.).
Figure S3. TEM and mapping EDS of CJ-2 and CJ-3 BNCs
(a) CJ-2 (b) CJ-3
Figure S4. HRTEM micrograph of CJ-2 and CJ-3 BNCs
(a) CJ-1 (b) CJ-2
(c) CJ-3 (d) CJ-4
(f) CJ-5 (g) CJ-6
Figure S5. Size distribution of CJ-Pt/Au BNCs series catalysts prepared by replacement reaction method.
Figure S6. HADDF-STEM images of a CJ-Pt/Au BNC (The red circle in the images indicates the presence of the vacancy resulted from replacement reaction process between Pt mother clusters and Au3+ ions. The green dashed square indicates the shape of the NC.).
(a) XPS spectrum of CJ-3 BNCs
(b) Au 4f (c) Pt 4f
Figure S7. Au 4f and Pt 4f XPS core level spectra recorded from CJ-3 BNCs (RPVP=100).
[S1] H. J. Zhang, T. Watanabe, M. Okumura, M. Haruta, N. Toshima, Nature Mater., 2012, 11, 49-52.
[S2] H. J. Zhang, L. L, Lu, K, Kawashima, M, Okumura, M, Haruta, N, Toshima, Adv. Mater., 2015, 27(8): 1383-1388.