Hubei Province Key Laboratory of Systems Science in Metallurgical Process, The State Key Laboratory of Refractories and Metallurgy, Collaborative Innovation Center for Advanced Steels, International Research Institute for Steel Technology, Wuhan University of Science and Technology, 430081 Wuhan, People's Republic of China.
Nanotechnology. 2020 Apr 10;31(15):155301. doi: 10.1088/1361-6528/ab667f. Epub 2019 Dec 31.
Pd-based catalysts are of significance for their application in direct alcohol fuel cells, due to the superior electro-catalytic performance and CO poisoning resistance. In this work, using PdNiP metallic glassy ribbon as precursor, micro/nano hierarchical nanoporous structure was constructed by the hybrid approach of thermal plastic micropatterning and subsequently electrochemical dealloying at 0.88 V for 120 min in 0.5 M HSO and 0.5 M HPO. This hierarchical structure was composed of the periodical micro-rods and nanoporous structure, where the chemical constituent was 80.33 at% Pd, 4.87 at% Ni, 4.96 at% P, and 9.84 at% O. The nanoporous structures showed an enhanced methanol electro-oxidation performance in alkaline medium, owing to their enlarged specific surface area. Compared to single nanoporous structure, the hierarchical nanoporous structure exhibited much better electro-catalysis, mainly attributed to the large surface area and high mass transfer efficiency, indicating a promising perspective for the application in alkaline direct alcohol fuel cells.
基于钯的催化剂因其在直接醇燃料电池中的优异电催化性能和抗 CO 中毒性能而具有重要意义。在这项工作中，使用 PdNiP 金属玻璃带作为前体，通过热塑性微图案化和随后在 0.5 M HSO 和 0.5 M HPO 中在 0.88 V 下电化学脱合金 120 分钟的混合方法构建了微/纳分级纳米多孔结构。这种分层结构由周期性的微棒和纳米多孔结构组成，其中化学成分为 80.33at%Pd、4.87at%Ni、4.96at%P 和 9.84at%O。纳米多孔结构在碱性介质中表现出增强的甲醇电氧化性能，这归因于其增大的比表面积。与单一纳米多孔结构相比，分级纳米多孔结构表现出更好的电催化性能，主要归因于大的表面积和高传质效率，表明其在碱性直接醇燃料电池中的应用具有广阔的前景。
