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引用次数: 0
摘要
元素分布可精确控制的铂基合金在催化领域备受青睐。本研究的重点是通过高温热处理优化铂镍合金纳米线（NWs）中的元素分布和合金化。由此产生的元素分布均匀的铂镍合金纳米线（U-PtNi NWs）表现出卓越的稳定性，这归功于电子传递的促进和更致密的铂壳，与未经处理的纳米线形成鲜明对比的是，未经处理的纳米线在电化学测试中会出现元素偏析和随后的性能下降。在甲醇氧化反应测试中，U-铂镍纳米线表现出卓越的质量活性（1562.0 mA mg-1）和比活性（5.38 mA cm-2），1000 次循环后活性损失极小。这项工作强调了在开发高性能催化剂过程中精确控制组分的重要性，并提出了一种通过一维纳米组分调整来提高燃料电池性能的策略。
Efficient Methanol Oxidation Catalysis by PtNi Nanowires with Controllable Element Distribution
Pt-based alloys with precisely controllable element distribution are highly sought after in catalysis. This study focuses on optimizing elemental distribution and alloying in PtNi alloy nanowires (NWs) through high-temperature heat treatment. The resulting PtNi alloy NWs with uniform elemental distribution (U-PtNi NWs) demonstrate exceptional stability, attributed to facilitated electron transfer and a denser Pt shell, in stark contrast to untreated NWs that suffer from elemental segregation and subsequent performance degradation during electrochemical testing. In methanol oxidation reaction tests, U-PtNi NWs demonstrated exceptional mass activity (1562.0 mA mg–1) and specific activity (5.38 mA cm–2), with minimal activity loss after 1000 cycles. This work emphasizes the significance of precise component control in developing high-performance catalysts and presents a strategy to enhance fuel cell performance through one-dimensional nanocomponent adjustment.
期刊介绍：
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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