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. 2019 Mar 29;10:1428. doi: 10.1038/s41467-019-09421-5

Table 1.

Structural and textural properties of the confined AuPd nanoalloy catalysts

Sample Metal contenta (wt%) Au:Pd (atomic ratio) Dmetalf (nm) a0g (nm) SBET (m2 g−1) Vt (cm3 g−1) Dp (nm)
Au Pd Theo.b XPSc EDX-TEMd EDX-STEMe
Au 3.25 0 - - - - 3.1 0.4062 359 0.24 3.6
Au80Pd20 2.90 0.39 4 4.18 3.88 n.p.h 3.2 0.4042 329 0.23 3.7
Au67Pd33 2.58 0.65 2 1.80 1.86 1.79 2.7 0.4022 334 0.23 3.6
Au50Pd50 2.12 1.17 1 0.90 0.92 1.10 2.9 0.4017 359 0.24 3.6
Au33Pd67 1.58 1.71 0.5 0.42 0.52 0.48 3.2 0.3991 336 0.23 3.6
Au20Pd80 1.03 2.25 0.25 0.21 0.22 n.p. 3.2 0.3980 315 0.22 3.6
Pd 0 3.31 - - - - 2.8 0.3901 348 0.23 3.6
Au50Pd50-R6i 2.12 1.17 1 0.92 0.90 1.08 2.9 0.4017 292 0.18 3.4

For comparison, the properties for monometallic Au and Pd catalysts are also provided

aTheoretical Au and Pd contents

bTheoretical Au:Pd atomic ratio

cAu:Pd atomic ratio estimated from the XPS spectra

dAu:Pd atomic ratio estimated from the EDX pattern collected in TEM mode

eAu:Pd atomic ratio estimated from EDX with a focused electron beam in the sub-nanometre range in STEM mode

fParticle size estimated from the TEM images of the monometallic gold, monometallic palladium or nanoalloy AuxPdy

gLattice spacing of metal calculated from the wide-angle XRD pattern

hn.p.: not provided

iThe Au50Pd50 catalyst after the sixth catalytic run