Engineering PtRu bimetallic nanoparticles with adjustable alloying degree for methanol electrooxidation: Enhanced catalytic performance
By Jun‐ming Zhang, Xi‐ming Qu, Yu Han, Lin‐fan Shen, Shuhu Yin, Guang Li, Yan‐xia Jiang, Shigang Sun. 2020
159 citations recorded by the source corpus.
Abstract PtRu bimetal is of particularly attractive in various electrocatalytic reactions owing to its synergistic effect, ligand effect and strain effect. Here, PtRu nanoalloy supported on porous graphitic carbon (PC) has been successfully prepared via a very facile method involving co-reduction the precursors of Pt and Ru at 300 °C by H2 (PtRu/PC L) followed by thermal treatment at high temperature (700 °C, PtRu/PC–H). Specifically, the electrocatalytic performance of PtRu/PC nanoalloy could be dramatically enhanced through high-temperature annealing. This strategy has synthesized smaller Pt and PtRu nanoparticles (ca. L and Pt/PC nanocatalysts. The mass activity and specific activity on PtRu/PC–H nanoalloy can be increased to 1674.2 mA mg−1Pt and 4.4 mA cm−2 for MOR, it is 4.08 and 8.80 times higher than that of the Pt/PC nanocatalyst, respectively. From in-situ FTIR spectra, we can discover PtRu/PC–H nanoalloy generates CO2 at a lower potential of −150 mV than those on PtRu/PC–L (0 mV) and Pt/PC (50 mV) nanocatalysts, dramatically improves the ability of cleavage C–H bond and alleviates the COads poisoning on active sites. The PtRu/PC H nanocatalyst exhibits maximum power density of 83.7 mW cm−2 in single methanol fuel cell test, which more than threefold than that of commercial Pt/C as the anode catalyst. Those experimental results open an effective and clean avenue in the development and preparation of high-performance Pt-based nanocatalysts for direct methanol fuel cells.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/0812b8a04025add1be441ed84fe7c8f593a736f5
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Progress and challenges: Review for direct liquid fuel cell (2021, background): “The addition of a second metal to Pt could provide more sites to adsorb the oxygenated species and promotes the water activation, hence facilitates the oxidative removal of intermediate carbonaceous species (COads) at lower potential and helpful in weakening the CO adsorption on the Pt surfaces.(64,”