Nanotube-shaped PtFe intermetallics: controlled synthesis, crystal structure, and improved electrocatalytic activities†,CrystEngComm

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Nanotube-shaped PtFe intermetallics: controlled synthesis, crystal structure, and improved electrocatalytic activities†
CrystEngComm ( IF 2.6 ) Pub Date : 2018-06-28 00:00:00 , DOI: 10.1039/c8ce00601f
Xuebin Zhang _{1,

2,

3,

4,

5} , Shujun Tian _{1,

2,

3,

4,

5} , Wenjing Yu _{1,

2,

3,

4,

5} , Bingqing Lu _{1,

2,

3,

4,

5} , Tianyang Shen _{6,

7,

8,

9} , Lin Xu _{1,

2,

3,

4,

5} , Dongmei Sun _{1,

2,

3,

4,

5} , Shoulin Zhang _{1,

2,

3,

4,

5} , Yawen Tang _{1,

2,

3,

4,

5}

Affiliation

Well-shaped intermetallic compounds with unique electronic structures and characteristic long range atomic orders have gained tremendous interest due to their attractive electrocatalytic performances and promising long-term durabilities. In this study, we report a facile strategy for the efficient synthesis of ordered PtFe intermetallics in nanotube shapes using cost-effective premade elongated β-FeOOH as a microstructure template followed by surface self-assembly with an ultra-thin layer of platinum shell and controlled heat treatments under mild experimental conditions. Compared to the commercial Pt black catalyst, the proposed ordered PtFe intermetallic nanotubes (NTs) exhibit an enhancement in mass activity (536.67 A g⁻¹) by a factor of 2.0 and specific activity (61.64 A m⁻²) by 5.8 for the methanol oxidation reaction (MOR). These results pave the way for the fabrication of well-shaped ordered intermetallic catalysts towards practical applications in fuel cells.

中文翻译：

纳米管形的PtFe金属间化合物：受控的合成，晶体结构和改善的电催化活性†

具有独特的电子结构和特征性的长程原子序的形状良好的金属间化合物因其吸引人的电催化性能和长期的长期耐用性而引起了人们的极大兴趣。在这项研究中，我们报告了一种可行的策略，该方法可使用具有成本效益的预制细长β-FeOOH作为微观结构模板，然后通过具有超薄铂壳层的表面自组装和可控方法，以纳米管形状有效合成有序的PtFe金属间化合物。在温和的实验条件下进行热处理。与市售的Pt黑色催化剂相比，拟议的有序PtFe金属间纳米管（NTs）的质量活性（536.67 A g ^-1）提高了2.0倍，比活性（61.64 A m ^{-2）提高了}）由5.8进行甲醇氧化反应（MOR）。这些结果为在燃料电池的实际应用中制造形状良好的有序金属互化物催化剂铺平了道路。

更新日期：2018-06-28

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