TY  - JOUR
T1  - Pt-M/C (M = Cu, Ag) electrocatalysts with an inhomogeneous distribution of metals in the nanoparticles
JO  - International Journal of Hydrogen Energy
VL  - 41
IS  - 3
SP  - 1609
EP  - 1626
PY  - 2016/1/21/
T2  - 
AU  - Guterman, V.E.
AU  - Belenov, S.V.
AU  - Pakharev, A.Yu.
AU  - Min, M.
AU  - Tabachkova, N.Yu.
AU  - Mikheykina, E.B.
AU  - Vysochina, L.L.
AU  - Lastovina, T.A.
SN  - 0360-3199
DO  - https://doi.org/10.1016/j.ijhydene.2015.11.002
UR  - http://www.sciencedirect.com/science/article/pii/S0360319915308600
KW  - Electrocatalyst
KW  - Core-shell
KW  - Bimetallic nanoparticles
KW  - Fuel cell
KW  - Durability
KW  - Platinum alloy
AB  - Abstract
The sequential chemical reduction of metals (copper or silver) and platinum was used to prepare M@Pt/C electrocatalysts that contain a high content of platinum on the surface of bimetallic nanoparticles. The compositions, microstructures and electrochemical behaviors of these electrocatalysts were studied using X-ray diffraction, thermogravimetry, X-ray fluorescence analysis, TEM and cyclic voltammetry. Depending on the composition and mode of synthesis, the obtained electrocatalysts have electrochemically active surface areas ranging from 35 to 61 m2 g−1 (Pt). The presence of nanoparticles with a core-shell structure was directly confirmed for Cu0.9Pt0.1@Pt/C sample. Copper-containing electrocatalysts exhibited better stability during voltammetric cycling compared to a similar composition of commercial Pt/C electrocatalyst and Ag0.9Pt0.1@Pt/C systems, but one of Ag0.9Pt0.1@Pt/C electrocatalysts has shown the highest specific activity in ORR.
ER  -