Journal
NANOMATERIALS
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/nano11102491
Keywords
metal-organic frameworks; N-doped carbon nanotube; hollow porous carbon; Pt-based catalysts; direct methanol fuel cells
Categories
Funding
- National Natural Science Foundation of China [21766038]
- Natural Science Foundation of Xinjiang Autonomous Region of China [2019D01C018]
- Shanghai Cooperation Organization Science and Technology Partnership Program [2020E01020]
- Tianshan Cedar Plan of Xinjiang Autonomous Region of China [2020XS02]
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The study presents a new method for constructing advanced electrocatalysts for MOR using Co-NCNT-HPC derived from MOFs as a support for Pt catalysts. The Pt/Co-NCNT-HPC800 sample shows enhanced mass activity and stability in methanol oxidation reaction, demonstrating the potential for commercial applications in DMFCs.
It is of prime importance to develop anode electrocatalysts for direct methanol fuel cells (DMFCs) with good performance, which is critical for their commercial applications. Metal-organic framework (MOF)-derived carbon materials are extensively developed as supports of catalysts. Herein, Co embedded nitrogen-doped carbon nanotube hollow porous carbon (Co-NCNT-HPC) derived from MOFs have been fabricated, which were synthesized by pyrolyzing at an optimized temperature of 800 & DEG;C using ZIF-8@ZIF-67 as a precursor. The presence of ZIF-8@ZIF-67 ensures the doping of nitrogen and the large specific surface area of the support materials at high temperatures. A Pt/Co-NCNT-HPC800 sample, which was synthesized using Co-NCNT-HPC800 as a support, showed an enhanced mass activity of 416.2 mA mg(Pt)(-1) for methanol oxidation reaction (MOR), and the onset potential of COad oxidation of 0.51 V, which shifted negatively about 0.13 V compared with Pt/C (20%). Moreover, the Pt/Co-NCNT-HPC800 sample exhibits high stability. This work provides a facile strategy for MOF-derived carbon materials to construct advanced electrocatalysts for MOR.
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