低温处理对具有高指数优选取向面的活性自支撑纳米多孔钯银催化剂电催化性能的影响

IF 2.4 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2024-09-09 DOI:10.1007/s11581-024-05798-6
Jinrong Duan, Fang Si, Jiafen Wang, Linlin Lu, Jia Liu, Yanyan Song, Jiahui Mo, Jincui Yu, Jinlong Gao
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引用次数: 0

摘要

燃料电池因其能量转换率高、容量大、零排放而被认为是最佳候选电源。然而,作为关键核心材料的贵金属催化剂存在成本高、耐久性差等问题。因此,本文通过对铝钯银带进行低温处理和一步脱合金化处理,成功地形成了活性自支撑纳米多孔钯银催化剂。催化剂韧带表面的高指数面(220)和(311)呈现出一定程度的优先取向。结果表明,在特殊构型和促进剂 Ag 的协同作用下,甲醇电催化氧化催化剂的活性和稳定性得到了显著提高。催化剂的电催化活性分别约为商用 Pt/C 催化剂和商用 Pd/C 催化剂的 9.7 倍和 15.2 倍。5000 s 后,1800 rpm-deep2 样品的电流密度为 382.88 mA-mg-1,分别是商用 Pt/C 催化剂和商用 Pd/C 催化剂的 14.1 倍和 39.9 倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of the cryogenic treatment on the electrocatalytic performance of the active self-supporting nanoporous Pd–Ag catalyst with high-index facets’ preferred orientation

Effect of the cryogenic treatment on the electrocatalytic performance of the active self-supporting nanoporous Pd–Ag catalyst with high-index facets’ preferred orientation

Fuel cell is considered the best candidate power source because of its high energy conversion rate, large capacity, and zero emission. However, noble metal catalysts as a key core material have some problems, such as high cost and poor durability. Therefore, in this paper, the active self-supporting nanoporous Pd–Ag catalysts are successfully formed by cryogenic treatment and one-step dealloying treatment of Al-Pd–Ag ribbons. The surface of the catalyst ligaments shows a certain degree of preferred orientation for high-index facets (220) and (311). The results show that the activity and stability of the catalysts for methanol electrocatalytic oxidation are significantly improved under the synergistic effect of special configuration and promoter Ag. The electrocatalytic activity of the catalysts is about 9.7 and 15.2 times that of commercial Pt/C and commercial Pd/C catalysts, respectively. After 5000 s, the current density of the 1800 rpm-deep2 sample is 382.88 mA·mg−1, which is about 14.1 times and 39.9 times that of commercial Pt/C catalyst and commercial Pd/C catalyst.

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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