Journal
NANOSCALE
Volume 11, Issue 28, Pages 13477-13483Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr04767k
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Funding
- National Natural Science Foundation of China [21875133]
- Fundamental Research Funds for the Central Universities [GK201901002, GK201803038, 2017TS049]
- 111 Project [B14041]
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Direct ethanol fuel cells (DEFCs) with a high conversion efficiency are quite promising candidates for energy conversion devices. Herein, we have successfully synthesized PdCo alloy nanocubes supported on carbon nanobowl (denoted as Pd2Co1/CNB) nanohybrids by using the cyanogel auto-reduction method at high temperature. The morphology, composition and structure of Pd2Co1/CNB nanohybrids are characterized in detail, revealing that PdCo nanocubes have a high alloying degree and special {110} facets. In cyclic voltammetry measurements, Pd2Co1/CNB nanohybrids show a mass activity of 1089.0 A g (-1)(Pd) and a specific activity of 40.03 mA cm(-2) for ethanol electrooxidation at peak potential, which are much higher than that of the commercial Pd/C electrocatalyst (278.2 A g(Pd)(-1) and 8.22 mA cm(-2)). Additionally, chronoamperometry measurements show that Pd2Co1/CNB nanohybrids have excellent durability for ethanol electrooxidation. A high alloying degree, special {110} facets and the CNB supporting material contribute to the high activity and durability of Pd2Co1/CNB nanohybrids, making them a highly promising Pt-alternative electrocatalyst for ethanol electrooxidation in DEFCs.
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