期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 26, 期 18, 页码 4032-4038出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201904473
关键词
alcohol oxidation reaction; electrocatalysis; interface; nanowires; Pt-based catalyst
资金
- National Natural Science Foundation of China (NSFC) [21571112, 51572136, 51671003, 21771156, 51802171, 51772162]
- Natural Science Foundation of Shandong Province [ZR2018BB031]
- Shandong Taishan Scholar Program
- Beijing Natural Science Foundation [JQ18005]
- National R&D Program of China [2017YFA0206701]
- Young Thousand Talented Program
Searching for new anti-poisoning Pt-based catalysts with enhanced activity for alcohol oxidation is the key in direct alcohol fuel cells (DAFCs). However, in the traditional strategy for designing bimetallic or multimetallic alloy is still difficult to achieve a satisfactory heterogeneous electrocatalyst because the activity often depends on only the surface atoms. Herein, we fabricate the multicomponent active sites by creating a sulfide structure on 1D PtNiCo trimetallic nanowires (NWs), to give a PtNiCo/NiCoS interface NWs (IFNWs). Owing to the presence of sulfide interfaces, the PtNiCo/NiCoS IFNWs enable an impressive methanol/ethanol oxidation reaction (MOR/EOR) performance and excellent anti-CO poisoning tolerance. They have the MOR and EOR mass activities of 2.25 Amg(Pt)(-1) and 1.62 Amg(Pt)(-1), around 1.26, 3.21 and 1.46, 2.96 times higher than those of PtNiCo NWs and commercial Pt/C, respectively. CO-stripping and XPS measurements further demonstrate that the new interfacial structure and optimal bonding of Pt-CO can result in accelerating the removal of surface adsorbed carbonaceous intermediates. Moreover, such a unique structure has also demonstrated a much-improved ability for the electrochemical detection of some important molecules (H2O2 and NH2NH2).
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