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Pt Loading of Phosphorus-Doped Carbon Nanotube Aerogels in Fuel Cell-Type Gas Sensors for Ultrasensitive H2 Detection
ACS Sensors ( IF 8.2 ) Pub Date : 2024-07-10 , DOI: 10.1021/acssensors.4c00948 Lingchu Huang 1 , Huaiyuan Sun 1 , Weijia Li 1 , Jianyu Zhang 1 , Sitong Feng 1 , Qi Lu 1 , Tong Wang 1 , Xishuang Liang 1 , Fangmeng Liu 1 , Fengmin Liu 1 , Geyu Lu 1
ACS Sensors ( IF 8.2 ) Pub Date : 2024-07-10 , DOI: 10.1021/acssensors.4c00948 Lingchu Huang 1 , Huaiyuan Sun 1 , Weijia Li 1 , Jianyu Zhang 1 , Sitong Feng 1 , Qi Lu 1 , Tong Wang 1 , Xishuang Liang 1 , Fangmeng Liu 1 , Fengmin Liu 1 , Geyu Lu 1
Affiliation
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A phosphorus-doped carbon nanotube (CNT) aerogel as the support material was loaded with Pt nanoparticles in fuel cell-type gas sensors for ultrasensitive H2 detection. The high surface area of the CNT scaffold is favorable to providing abundant active sites, and the high electrical conductivity facilitates the transport of carriers generated by electrochemical reactions. In addition, the CNT aerogel was doped with phosphorus (P) to further enhance the conductivity and electrochemical catalytic activity. As a result, the fuel cell-type gas sensor using the Pt/CNT aerogel doped with the optimal P content as the sensing material shows considerable performance for H2 detection at room temperature. The sensor exhibits an ultrahigh response of −921.9 μA to 15,000 ppm of H2. The sensitivity is −0.063 μA/ppm, which is 21 times higher than that of the conventional Pt/CF counterpart. The sensor also exhibits excellent repeatability and humidity resistance, as well as fast response/recovery; the response/recovery times are 31 and 4 s to 3000 ppm of H2, respectively. The modulation of the structure and catalytic properties of the support material is responsible for the improvement of the sensor performance, thus providing a feasible solution for optimizing the performance of fuel cell-type gas sensors.
中文翻译：
用于超灵敏 H2 检测的燃料电池型气体传感器中磷掺杂碳纳米管气凝胶的 Pt 负载
以掺磷碳纳米管（CNT）气凝胶作为支撑材料，在燃料电池型气体传感器中负载Pt纳米颗粒，用于超灵敏H 2检测。 CNT支架的高表面积有利于提供丰富的活性位点，高电导率有利于电化学反应产生的载流子的传输。此外，CNT气凝胶还掺杂了磷（P），进一步增强了电导率和电化学催化活性。因此，使用掺杂最佳P含量的Pt/CNT气凝胶作为传感材料的燃料电池型气体传感器在室温下的H 2检测方面表现出可观的性能。该传感器对 15,000 ppm H 2表现出 -921.9 μA 的超高响应。灵敏度为-0.063 μA/ppm，比传统 Pt/CF 同类产品高 21 倍。该传感器还表现出优异的重复性和耐湿性，以及快速响应/恢复；对于 3000 ppm H 2 ，响应/恢复时间分别为 31 秒和 4 秒。支撑材料的结构和催化性能的调节负责传感器性能的提高，从而为优化燃料电池型气体传感器的性能提供了可行的解决方案。
更新日期：2024-07-10
中文翻译：
用于超灵敏 H2 检测的燃料电池型气体传感器中磷掺杂碳纳米管气凝胶的 Pt 负载
以掺磷碳纳米管（CNT）气凝胶作为支撑材料，在燃料电池型气体传感器中负载Pt纳米颗粒，用于超灵敏H 2检测。 CNT支架的高表面积有利于提供丰富的活性位点，高电导率有利于电化学反应产生的载流子的传输。此外，CNT气凝胶还掺杂了磷（P），进一步增强了电导率和电化学催化活性。因此，使用掺杂最佳P含量的Pt/CNT气凝胶作为传感材料的燃料电池型气体传感器在室温下的H 2检测方面表现出可观的性能。该传感器对 15,000 ppm H 2表现出 -921.9 μA 的超高响应。灵敏度为-0.063 μA/ppm，比传统 Pt/CF 同类产品高 21 倍。该传感器还表现出优异的重复性和耐湿性，以及快速响应/恢复；对于 3000 ppm H 2 ，响应/恢复时间分别为 31 秒和 4 秒。支撑材料的结构和催化性能的调节负责传感器性能的提高，从而为优化燃料电池型气体传感器的性能提供了可行的解决方案。
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