期刊
ADVANCED MATERIALS
卷 31, 期 40, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201903683
关键词
electrocatalysis; formic acid oxidation; intermetallic catalysts; nanoplates
类别
资金
- China Postdoctoral Science Foundation [2018M641633] Funding Source: Medline
- National Natural Science Foundation of China [51772142] Funding Source: Medline
- Novel Nanomaterial Discipline Construction Plan Funding Source: Medline
- Development and Reform Commission of Shenzhen Municipality Funding Source: Medline
- Shenzhen Science and Technology Innovation Commission [KQTD2016053019134356, JCYJ20170412152528921, KQJSCX20170328155428476] Funding Source: Medline
- SUSTech Presidential Fund Funding Source: Medline
Platinum is the most effective metal for a wide range of catalysis reactions, but it fails in the formic acid electrooxidation test and suffers from severe carbon monoxide poisoning. Developing highly active and stable catalysts that are capable of oxidizing HCOOH directly into CO2 remains challenging for commercialization of direct liquid fuel cells. A new class of PtSnBi intermetallic nanoplates is synthesized to boost formic acid oxidation, which greatly outperforms binary PtSn and PtBi intermetallic, benefiting from the synergism of chosen three metals. In particular, the best catalyst, atomically ordered Pt45Sn25Bi30 nanoplates, exhibits an ultrahigh mass activity of 4394 mA mg(-1) Pt and preserves 78% of the initial activity after 4000 potential cycles, which make it a state-of-the-art catalyst toward formic acid oxidation. Density functional theory calculations reveal that the electronic and geometric effects in PtSnBi intermetallic nanoplates help suppress CO* formation and optimize dehydrogenation steps.
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