Highly-selective synthesis of trimetallic PtRuCu nanoframes as robust catalysts for the methanol oxidation reaction,Materials Chemistry Frontiers

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Highly-selective synthesis of trimetallic PtRuCu nanoframes as robust catalysts for the methanol oxidation reaction
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-04-27 , DOI: 10.1039/d0qm00033g
Hai-Jing Yin _{1,

2,

3,

4,

5} , Zhi-Ping Zhang _{1,

2,

3,

4,

5} , Yu Guo _{1,

2,

3,

4,

5} , Kun Yuan _{1,

2,

3,

4,

5} , Ya-Wen Zhang _{1,

2,

3,

4,

5}

Affiliation

Multimetallic nanoframes (NFs) with large specific area and unsaturated coordination sites showed superior catalytic performance in electrochemical catalysis. Herein, we synthesized robust trimetallic PtRuCu NFs with high shape selectivity via preferential etching of Cu in PtRuCu nanoparticles (NPs) with nitrosonium tetrafluoroborate (BF₄NO). As far as we know, this is the first time that BF₄NO has been used as an etching reagent. PtRuCu NF/C exhibited superior mass activity and specific area activity over commercial Pt/C towards the methanol oxidation reaction (MOR) due to the large specific area, high-density low-coordinated sites of the frame nanostructures and the synergistic effect of the trimetallics. Moreover, PtRuCu NFs/C also showed higher catalytic activity than the similar NFs obtained with acetic acid (HAc) as the etching reagent. We attributed the better performance to the fact that BF₄NO was not only an etching-agent but also a ligand exchange reagent that could remove the olamine ligands on the catalyst surface, thus releasing more catalytic sites to improve the catalytic performance.

中文翻译：

三金属PtRuCu纳米骨架的高选择性合成作为甲醇氧化反应的强力催化剂

具有大比表面积和不饱和配位点的多金属纳米框架（NFs）在电化学催化中显示出优异的催化性能。在这里，我们通过优先腐蚀四氟硼酸硝基硼（BF ₄ NO）来腐蚀PtRuCu纳米颗粒（NPs）中的Cu，从而合成了具有高形状选择性的坚固的三金属PtRuCu NFs 。据我们所知，这是BF ₄的第一次NO已经被用作蚀刻剂。PtRuCu NF / C相对于商业化的Pt / C在甲醇氧化反应（MOR）方面表现出优异的质量活性和比面积活性，这是因为骨架纳米结构的比表面积大，高密度低配位点以及三金属的协同效应。此外，PtRuCu NFs / C还显示出比以乙酸（HAc）作为蚀刻剂获得的类似NFs更高的催化活性。我们将更好的性能归因于以下事实：BF ₄ NO不仅是蚀刻剂，而且还是可以去除催化剂表面上的羟胺配体，从而释放出更多催化位点以改善催化性能的配体交换试剂。

更新日期：2020-07-02

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