RuOx-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction†,Nanoscale

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RuOx-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction†
Nanoscale ( IF 5.8 ) Pub Date : 2018-10-18 00:00:00 , DOI: 10.1039/c8nr06168h
Jongsik Park _{1,

2,

3,

4} , Hee Jin Kim _{4,

5,

6,

7} , Aram Oh _{3,

4,

8} , Taehyun Kwon _{1,

2,

3,

4} , Hionsuck Baik _{3,

4,

8} , Sang-Il Choi _{4,

5,

6,

7} , Kwangyeol Lee _{1,

2,

3,

4}

Affiliation

Direct methanol fuel cell technology awaits the development of highly efficient and robust nanocatalysts driving the methanol oxidation reaction (MOR) in a CO poisoning-free fashion. Thus far, various Pt-based alloy nanoparticles have been studied as electrocatalysts toward the MOR, and it has been found that the introduction of dopants such as Ru and Cu to Pt has been particularly successful in mitigating the CO poisoning problem. Herein, we report a facile synthesis of Ru-branched RuPtCu nanocages that involves in situ formation of Ru-doped PtCu nanoparticles and subsequent outgrowth of Ru branches by insertion of additional Ru precursors. We show that the electrocatalytic activity and stability of Ru branched RuPtCu ternary nanocages toward the MOR are greatly improved compared to those of PtCu/C and RuPtCu/C counterparts and state-of-the-art PtRu/C and Pt/C catalysts, mainly due to the synergy between the CO-tolerant RuO_x phase and the highly open and robust RuPtCu nanoframe.

中文翻译：

RuO _x修饰的多金属杂化纳米体作为甲醇氧化反应的高效电催化剂†

直接甲醇燃料电池技术正等待开发高效且坚固的纳米催化剂，从而以无CO中毒的方式驱动甲醇氧化反应（MOR）。迄今为止，已经研究了各种基于Pt的合金纳米粒子作为用于MOR的电催化剂，并且已经发现将Ru和Cu等掺杂剂引入Pt在减轻CO中毒问题方面特别成功。在本文中，我们报道了涉及原位的Ru支化RuPtCu纳米笼的简便合成掺Ru的PtCu纳米颗粒的形成以及随后通过插入其他Ru前体而导致的Ru分支的长大。我们显示，与PtCu / C和RuPtCu / C对应物以及最先进的PtRu / C和Pt / C催化剂相比，Ru支化RuPtCu三元纳米笼对MOR的电催化活性和稳定性大大提高。由于耐CO的RuO _x相与高度开放且坚固的RuPtCu纳米框架之间的协同作用。

更新日期：2018-10-18

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