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Pt‐Ir‐Pd Trimetallic Nanocages as a Dual Catalyst for Efficient Oxygen Reduction and Evolution Reactions in Acidic Media
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-03-04 , DOI: 10.1002/aenm.201904114 Jiawei Zhu 1, 2 , Minghao Xie 3 , Zitao Chen 1, 4 , Zhiheng Lyu 3 , Miaofang Chi 4 , Wanqin Jin 2 , Younan Xia 1, 3
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-03-04 , DOI: 10.1002/aenm.201904114 Jiawei Zhu 1, 2 , Minghao Xie 3 , Zitao Chen 1, 4 , Zhiheng Lyu 3 , Miaofang Chi 4 , Wanqin Jin 2 , Younan Xia 1, 3
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The development of dual catalysts with high efficiency toward oxygen reduction and evolution reactions (ORR and OER) in acidic media is a significant challenge. Here an active and durable dual catalyst based upon cubic Pt39Ir10Pd11 nanocages with an average edge length of 12.3 nm, porous walls as thin as 1.0 nm, and well‐defined {100} facets is reported. The trimetallic nanocages perform better than all the reported dual catalysts in acidic media, with a low ORR‐OER overpotential gap of only 704 mV at a Pt‐Ir‐Pd loading of 16.8 µgPt+Ir+Pd cm−2geo. For ORR at 0.9 V, when benchmarked against the commercial Pt/C and Pt‐Pd nanocages, the trimetallic nanocages exhibit an enhanced mass activity of 0.52 A mg−1Pt+Ir+Pd (about four and two times as high as those of the Pt/C and Pt‐Pd nanocages) and much improved durability. For OER, the trimetallic nanocages show a remarkable mass activity of 0.20 A mg−1Pt+Ir at 1.53 V, which is 16.7 and 4.3 fold relative to those of the Pt/C and Pt‐Pd nanocages, respectively. These improvements can be ascribed to the highly open structure of the nanocages, and the possible electronic coupling between Ir and Pt atoms in the lattice.
中文翻译：
Pt-Ir-Pd三金属纳米笼作为酸性介质中高效氧还原和逸出反应的双重催化剂
在酸性介质中高效开发针对氧气还原和放出反应（ORR和OER）的双重催化剂是一项重大挑战。在此报道了一种基于立方Pt 39 Ir 10 Pd 11纳米笼的活性且耐用的双重催化剂，其平均边缘长度为12.3 nm，薄至1.0 nm的多孔壁，以及明确定义的{100}面。三金属纳米笼在酸性介质中的性能优于所有报道的双重催化剂，在16.8 µg Pt + Ir + Pd cm -2 geo的Pt-Ir-Pd负载下，ORR-OER的超电势差仅为704 mV。。对于0.9 V的ORR，当以市售Pt / C和Pt-Pd纳米笼为基准时，三金属纳米笼的质量活度提高了0.52 A mg -1 Pt + Ir + Pd（大约是Pt / Ir + Pd的四和两倍） Pt / C和Pt-Pd纳米笼）并大大提高了耐用性。对于OER，三金属纳米笼在1.53 V时显示出0.20 A mg -1 Pt + Ir的显着质量活性，分别是Pt / C和Pt-Pd纳米笼的16.7和4.3倍。这些改进可以归因于纳米笼的高度开放的结构，以及晶格中Ir和Pt原子之间可能的电子耦合。
更新日期：2020-04-21
中文翻译：
Pt-Ir-Pd三金属纳米笼作为酸性介质中高效氧还原和逸出反应的双重催化剂
在酸性介质中高效开发针对氧气还原和放出反应（ORR和OER）的双重催化剂是一项重大挑战。在此报道了一种基于立方Pt 39 Ir 10 Pd 11纳米笼的活性且耐用的双重催化剂，其平均边缘长度为12.3 nm，薄至1.0 nm的多孔壁，以及明确定义的{100}面。三金属纳米笼在酸性介质中的性能优于所有报道的双重催化剂，在16.8 µg Pt + Ir + Pd cm -2 geo的Pt-Ir-Pd负载下，ORR-OER的超电势差仅为704 mV。。对于0.9 V的ORR，当以市售Pt / C和Pt-Pd纳米笼为基准时，三金属纳米笼的质量活度提高了0.52 A mg -1 Pt + Ir + Pd（大约是Pt / Ir + Pd的四和两倍） Pt / C和Pt-Pd纳米笼）并大大提高了耐用性。对于OER，三金属纳米笼在1.53 V时显示出0.20 A mg -1 Pt + Ir的显着质量活性，分别是Pt / C和Pt-Pd纳米笼的16.7和4.3倍。这些改进可以归因于纳米笼的高度开放的结构，以及晶格中Ir和Pt原子之间可能的电子耦合。
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