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Hydrogen Evolution Reaction Monitored by Electrochemiluminescence Blinking at Single-Nanoparticle Level.
Nano Letters ( IF 9.6 ) Pub Date : 2020-06-09 , DOI: 10.1021/acs.nanolett.0c01129 Cheng Ma 1 , Hui-Fang Wei 1 , Min-Xuan Wang 1 , Shaojun Wu 1 , Yu-Chung Chang 2 , Jianrong Zhang 1 , Li-Ping Jiang 1 , Wenlei Zhu 2 , Zixuan Chen 1 , Yuehe Lin 2
Nano Letters ( IF 9.6 ) Pub Date : 2020-06-09 , DOI: 10.1021/acs.nanolett.0c01129 Cheng Ma 1 , Hui-Fang Wei 1 , Min-Xuan Wang 1 , Shaojun Wu 1 , Yu-Chung Chang 2 , Jianrong Zhang 1 , Li-Ping Jiang 1 , Wenlei Zhu 2 , Zixuan Chen 1 , Yuehe Lin 2
Affiliation
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Monitoring and characterization methods that provide performance tracking of hydrogen evolution reaction (HER) at the single-nanoparticle level can greatly advance our understanding of catalysts’ structure and activity relationships. Electrochemiluminescence (ECL) microscopy is implemented for the first time to identify HER activities of single nanocatalysts and to provide a direction for further optimization. Here, we develop a novel ECL blinking technique at the single-nanoparticle level to directly monitor H2 nanobubbles generated from hollow carbon nitride nanospheres (HCNSs). The ECL ON and OFF mechanisms are identified being closely related to the generation, growth, and collapse of H2 nanobubbles. The power-law distributed durations of ON and OFF states demonstrate multiple catalytic sites with stochastic activities on a single HCNS. The power-law coefficients of ECL blinking increase with improved HER activities from modified HCNSs with other active HER catalysts. Besides, ECL blinking phenomenon provides an explanation for the low cathodic ECL efficiency of semiconductor nanomaterials.
中文翻译：
在单纳米水平上通过电化学发光闪烁监测氢的释放反应。
监测和表征方法可在单纳米粒子水平上跟踪氢释放反应（HER）的性能，可大大提高我们对催化剂结构和活性关系的了解。首次使用电化学发光（ECL）显微镜鉴定单一纳米催化剂的HER活性，并为进一步优化提供指导。在这里，我们开发了一种在单纳米颗粒水平上的新型ECL闪烁技术，以直接监测由空心碳氮化物纳米球（HCNSs）产生的H 2纳米气泡。确定ECL的ON和OFF机制与H 2的产生，生长和崩溃密切相关。纳米气泡。ON和OFF状态的幂律分布持续时间表明在单个HCNS上具有随机活动的多个催化部位。ECL闪烁的幂律系数随着改性HCNS与其他活性HER催化剂的改进HER活性而增加。此外，ECL闪烁现象为半导体纳米材料的阴极ECL效率低提供了解释。
更新日期：2020-07-08
中文翻译：
在单纳米水平上通过电化学发光闪烁监测氢的释放反应。
监测和表征方法可在单纳米粒子水平上跟踪氢释放反应（HER）的性能，可大大提高我们对催化剂结构和活性关系的了解。首次使用电化学发光（ECL）显微镜鉴定单一纳米催化剂的HER活性，并为进一步优化提供指导。在这里，我们开发了一种在单纳米颗粒水平上的新型ECL闪烁技术，以直接监测由空心碳氮化物纳米球（HCNSs）产生的H 2纳米气泡。确定ECL的ON和OFF机制与H 2的产生，生长和崩溃密切相关。纳米气泡。ON和OFF状态的幂律分布持续时间表明在单个HCNS上具有随机活动的多个催化部位。ECL闪烁的幂律系数随着改性HCNS与其他活性HER催化剂的改进HER活性而增加。此外，ECL闪烁现象为半导体纳米材料的阴极ECL效率低提供了解释。
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