Direct Integration of Strained‐Pt Catalysts into Proton‐Exchange‐Membrane Fuel Cells with Atomic Layer Deposition
Direct Integration of Strained‐Pt Catalysts into Proton‐Exchange‐Membrane Fuel Cells with Atomic Layer Deposition
复制标题
通过原子层沉积将应变 Pt 催化剂直接集成到质子交换膜燃料电池中
DOI：
10.1002/adma.202007885
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发表时间：
2021
影响因子：
29.4
通讯作者：
F. Prinz
中科院分区：
文献类型：
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作者：
Shicheng Xu;Zhaoxuan Wang;Samuel M. Dull;Yunzhi Liu;D. Lee;Juan S Lezama Pacheco;Marat Orazov;P. Vullum;A. Dadlani;O. Vinogradova;P. Schindler;Qizhan Tam;Thomas D. Schladt;J. Mueller;S. Kirsch;Gerold Huebner;Drew C. Higgins;J. Torgersen;V. Viswanathan;T. Jaramillo;F. Prinz
报道了通过从经由原子层沉积合成的铂壳中去除可溶性核来实现晶格应变铂催化剂的设计和制造。在半电池和全电池配置中测量的氧还原反应（ORR）的显著催化性能归因于观察到的晶格应变。通过进一步优化纳米颗粒几何形状和离聚物/碳相互作用，在膜电极组件中可实现接近0.8 A mgPt− 1@0.9 V iR-free的质量活性。然而，具有高ORR活性的活性催化剂不一定导致高电流密度（HCD）区域中的高性能。更多的注意力应指向HCD性能，以实现高功率密度氢燃料电池。
The design and fabrication of lattice‐strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the oxygen reduction reaction (ORR), measured in both half‐cell and full‐cell configurations, is attributed to the observed lattice strain. By further optimizing the nanoparticle geometry and ionomer/carbon interactions, mass activity close to 0.8 A mgPt−1 @0.9 V iR‐free is achievable in the membrane electrode assembly. Nevertheless, active catalysts with high ORR activity do not necessarily lead to high performance in the high‐current‐density (HCD) region. More attention shall be directed toward HCD performance for enabling high‐power‐density hydrogen fuel cells.