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Designing Robust Support for Pt Alloy Nanoframes with Durable Oxygen Reduction Reaction Activity
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-02-08 00:00:00 , DOI: 10.1021/acsami.8b21459 Zhifu Wu 1, 2 , Dai Dang 3 , Xinlong Tian 4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-02-08 00:00:00 , DOI: 10.1021/acsami.8b21459 Zhifu Wu 1, 2 , Dai Dang 3 , Xinlong Tian 4
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Polymer electrolyte membrane fuel cells are appealing to resolve the environmental and energy issues but are still heavily inhibited by the dilemma of fabricating effective and durable electrocatalysts for oxygen reduction reaction (ORR). In this work, highly open Pt3Cu nanoframes and one-dimensional, hollow titanium nitride architectures are both successfully explored and implemented as the new system to replace the traditional Pt–carbon motif. The ORR performance of the obtained electrocatalyst shows specific and mass activities of 5.32 mA cm–2 and 2.43 A mgPt–1, respectively, which are 14.4 and 11.6 times higher than those of the commercial Pt/C. Notably, the novel catalyst also exhibits high stability and a much slower performance degradation than that of the benchmarked Pt3Cu/C with the same durability testing procedures. The comprehensive data confirm that the new type of catalyst possesses a high charge transfer during the ORR process, and the unique structure and synergistic effects between anchored Pt and the support mainly contributes to the high stability. This work provides a strategic method for designing an effective ORR electrocatalyst with desirable stability.
中文翻译：
设计具有持久氧还原反应活性的Pt合金纳米框架的坚固支撑
聚合物电解质膜燃料电池吸引人们解决环境和能源问题，但是仍然受到制造用于氧还原反应（ORR）的有效且耐用的电催化剂的困境的严重抑制。在这项工作中，成功地探索并实施了高度开放的Pt 3 Cu纳米框架和一维空心氮化钛结构，并将其作为替代传统Pt-碳图案的新系统。所得电催化剂的ORR性能显示出5.32 mA cm –2和2.43 A mg Pt –1的比活和质量活度分别比市售Pt / C高14.4倍和11.6倍。值得注意的是，与相同的耐久性测试程序相比，该新型催化剂还具有较高的稳定性和比基准Pt 3 Cu / C慢得多的性能退化。综合数据证实，新型催化剂在ORR过程中具有高电荷转移，且锚定Pt与载体之间的独特结构和协同作用主要是对高稳定性的贡献。这项工作为设计具有所需稳定性的有效ORR电催化剂提供了一种战略方法。
更新日期：2019-02-08
中文翻译：
设计具有持久氧还原反应活性的Pt合金纳米框架的坚固支撑
聚合物电解质膜燃料电池吸引人们解决环境和能源问题，但是仍然受到制造用于氧还原反应（ORR）的有效且耐用的电催化剂的困境的严重抑制。在这项工作中，成功地探索并实施了高度开放的Pt 3 Cu纳米框架和一维空心氮化钛结构，并将其作为替代传统Pt-碳图案的新系统。所得电催化剂的ORR性能显示出5.32 mA cm –2和2.43 A mg Pt –1的比活和质量活度分别比市售Pt / C高14.4倍和11.6倍。值得注意的是，与相同的耐久性测试程序相比，该新型催化剂还具有较高的稳定性和比基准Pt 3 Cu / C慢得多的性能退化。综合数据证实，新型催化剂在ORR过程中具有高电荷转移，且锚定Pt与载体之间的独特结构和协同作用主要是对高稳定性的贡献。这项工作为设计具有所需稳定性的有效ORR电催化剂提供了一种战略方法。
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