Xuzhao Shi , Wei Song , Tao Wei , Kui Zhang , Zhigang Shao
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引用次数: 0
摘要
质子交换膜燃料电池（PEMFC）的阳极铂催化剂易受氢气中微量 CO 的毒害，这限制了其大规模商业化。因此，开发具有一氧化碳耐受性的 PEMFC 催化剂至关重要，因为这将降低对氢气纯度的要求。在本研究中，我们通过在聚苯胺改性导电碳复合载体（Pt/C-PANI）上负载铂，合成了一种用于 PEMFC 阳极的耐 CO 催化剂。结果表明，复合载体中含有 5% PANI 的催化剂（Pt/C-PANI-5）具有最佳的氢氧化反应活性和二氧化碳耐受性。电化学测试表明，Pt/C-PANI-5 的电流下降率为 6.8%，而 Pt/C-sys 和商用 PtRu/C 催化剂的电流下降率分别为 20% 和 12%。此外，单细胞测试结果证实，Pt/C-PANI-5 对 CO 的耐受性有所提高。这些发现为开发具有成本效益的燃料电池催化剂提供了一种潜在的解决方案，这种催化剂对一氧化碳的耐受性更强。
Improved CO tolerance of Pt nanoparticles on polyaniline-modified carbon for PEMFC anode
The anode Pt catalyst of a proton-exchange membrane fuel cell (PEMFC) is susceptible to poisoning by trace amounts of CO in hydrogen, which restricts its large-scale commercialisation. Therefore, developing PEMFC catalysts with CO tolerance is crucial as it would reduce the requirement for hydrogen purity. In this study, we present a CO-tolerant catalyst for the PEMFC anode synthesised by loading Pt onto a polyaniline-modified conductive carbon composite support (Pt/C-PANI). The results showed that the catalyst containing 5% PANI in the composite support (Pt/C-PANI-5) exhibited optimal hydrogen oxidation reaction activity and CO tolerance. Electrochemical tests showed that the current drop of Pt/C-PANI-5 was 6.8%, compared to 20% and 12% for Pt/C-sys and commercial PtRu/C catalysts, respectively. Furthermore, results of the single-cell test confirmed improved CO tolerance. These findings provide a potential solution for developing cost-effective fuel cell catalysts with improved CO tolerance.
期刊介绍：
The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.
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