TY - JOUR
T1 - One-Step Synthesis of Supported High-Index Faceted Platinum-Cobalt Nanocatalysts for an Enhanced Oxygen Reduction Reaction
AU - Wang, Xue
AU - Zhao, Zelun
AU - Sun, Peng
AU - Li, Fuwei
PY - 2020/5/26
Y1 - 2020/5/26
N2 - The slow rate of the oxygen reduction reaction (ORR) is the main barrier limiting the commercialization of proton exchange membrane fuel cells on an industrial scale. Here, we report a one-step synthetic strategy of a class of carbon-supported Pt-Co alloy concave nanocubes (NCs) with {hk0} high-index facets with a high ORR activity. The concave degree of the Pt-Co alloy is tunable through adjusting the amount of short carbon-chain capping agent-n-butylamine. In the growth process, carbon black serves as a dispersant to avoid the nanoparticle aggregation and thus favor the generation of concave NCs in addition to the function as the support for Pt-Co nanoparticles. The carbon-supported Pt-Co concave NCs with 22% Pt-Co by weight deliver a specific activity of 2.34 mA cm-2 and mass activity of 0.26 A mg-1Pt toward ORR, representing 6.5-fold and twofold enhancement, respectively, relative to the state-of-the-art commercial Pt/C. After 5000 cycles of the accelerated durability test, the mass activity of carbon-supported Pt-Co concave NCs is still higher than that of pristine commercial Pt/C.
AB - The slow rate of the oxygen reduction reaction (ORR) is the main barrier limiting the commercialization of proton exchange membrane fuel cells on an industrial scale. Here, we report a one-step synthetic strategy of a class of carbon-supported Pt-Co alloy concave nanocubes (NCs) with {hk0} high-index facets with a high ORR activity. The concave degree of the Pt-Co alloy is tunable through adjusting the amount of short carbon-chain capping agent-n-butylamine. In the growth process, carbon black serves as a dispersant to avoid the nanoparticle aggregation and thus favor the generation of concave NCs in addition to the function as the support for Pt-Co nanoparticles. The carbon-supported Pt-Co concave NCs with 22% Pt-Co by weight deliver a specific activity of 2.34 mA cm-2 and mass activity of 0.26 A mg-1Pt toward ORR, representing 6.5-fold and twofold enhancement, respectively, relative to the state-of-the-art commercial Pt/C. After 5000 cycles of the accelerated durability test, the mass activity of carbon-supported Pt-Co concave NCs is still higher than that of pristine commercial Pt/C.
KW - catalyst support
KW - dispersion
KW - high-index facet
KW - oxygen reduction reaction
KW - Pt-Co alloy
UR - http://www.scopus.com/inward/record.url?scp=85087589733&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85087589733&origin=recordpage
U2 - 10.1021/acsaem.0c00801
DO - 10.1021/acsaem.0c00801
M3 - RGC 21 - Publication in refereed journal
SN - 2574-0962
VL - 3
SP - 5077
EP - 5082
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -
