Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 258, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117974
Keywords
Quaternary hexapod nano-skeletons; High-index facets; Vertex-reinforced; Methanol oxidation reaction; Oxygen reduction reaction
Funding
- Guangxi Science and Technology Project [AA17204083, AB16380030]
- National Basic Research Program of China [2015CB932304]
- Natural Science Foundation of Guangdong Province [2015A030312007]
- National Natural Science Foundation of China [U1705252]
- National Natural Science Foundation of Fujian Province [U1705252]
- Danish project of Initiative toward Non-precious Metal Polymer Fuel Cells [4106-000012B]
- Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH - CREATE - INNOVATE [T1EDK-02442]
- European Union
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Noble metal binary and ternary catalysts have become a new class of fuel cell electrocatalysts due to their high catalytic activity. However, improvement is still necessary to reduce the consumption of Pt and obtain the quaternary Pt-based catalyst by Mo modification. Through the introduction of Mo(CO)(6), novel quaternary hexapod nano-skeletons with high-index facets are obtained here, which are composed of core, first-layer feet and second-layer feet. Compared with PtCoNi nano-particles (NPs), the vertex-reinforced PtCoNiMo hexapod nano-skeletons (NSs), due to abundant tip areas, can facilitate electron transfer and mass exchange. It is found that the as prepared PtCoNiMo nano-skeletons catalyst exhibits enhanced mass activity, stability and anti-poisoning ability towards methanol oxidation reaction and oxygen reduction reaction, compared to commercial Pt/C catalyst and PtCoNi nanoparticles. More importantly, the development of quaternary catalysts can create better possibilities for the performance improvement of Pt-based catalysts.
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