Precisely tuning the electronic structure of a structurally ordered PtCoFe alloy via a dual-component promoter strategy for oxygen reduction dagger
Precisely tuning the electronic structure of a structurally ordered PtCoFe alloy via a dual-component promoter strategy for oxygen reduction dagger
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通过氧还原匕首的双组分促进剂策略精确调整结构有序 PtCoFe 合金的电子结构
DOI：
10.1039/d1cc00608h
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发表时间：
2021
影响因子：
4.9
通讯作者：
Wei Zidong
中科院分区：
文献类型：
--
作者：
Wang Qingmei;Tang Hao;Wang Meng;Guo Lin;Chen Siguo;Wei Zidong
优化Pt基合金的电子结构已成为进一步提高其催化氧还原反应（ORR）性能的有效策略，但这仍然具有挑战性。在这里，我们已经成功地调整了有序的PtCoFe纳米粒子的电子结构，通过将第三组分（Fe）纳入一个有序的PtCo合金和操纵其内容。PtCoFe-1-0.6合金（1和0.6分别代表Co与Pt和Fe与Pt的投料摩尔比）具有最佳的电子结构和良好的组成，并具有稳定的有序结构，因此表现出更好的ORR催化性能。L10-PtCoFe-1-0.6合金提供比活性（2.23 mA cm−2），高于LiNbO 3 L10-PtCo-1（1.34 mA cm−2）和商业Pt/C（0.23 mA cm−2）催化剂。事实上，这种双催化组分促进剂策略为开发高性能均相催化剂提供了重要的见解。
Optimizing the electronic structure of Pt-based alloys has emerged as an effective strategy to further improve their catalytic oxygen reduction reaction (ORR) performance, yet this remains challenging. Here, we have successfully tuned the electronic structure of ordered PtCoFe nanoparticles by incorporating the third component (Fe) into a bimetallic ordered PtCo alloy and manipulating its content. With the merits of the optimum electronic structure and the favorable composition, as well as the robust ordered structure, the as-prepared ordered PtCoFe-1-0.6 alloy (1 and 0.6 represent the feeding molar ratio of Co to Pt and Fe to Pt, respectively) exhibits enhanced catalytic performance for ORR. The L10-PtCoFe-1-0.6 alloy delivers higher specific activity (2.23 mA cm−2) than bimetallic L10-PtCo-1 (1.34 mA cm−2) and the commercial Pt/C (0.23 mA cm−2) catalyst. Indeed, this dual-catalytic-component promoter strategy gives a significant insight into developing high-performance homogeneous catalysts.