A nitrogen DC-pulse atmosphere pressure plasma jet (APPJ) is used to convert ferric nitrate (Fe(NO₃)₃) and chloroplatinic acid (H₂PtCl₆) mixed liquid precursor films into PtFe nanocompounds on a fluorine-doped tin oxide (FTO) substrate. Scanning transmission electron microscopy indicates nanoparticles distributed on a thin continuous layer on the FTO substrate. The APPJ-synthesized PtFe nanocompounds contain a mixture of crystalline and amorphous phases. X-ray photoelectron spectroscopy shows that most Pt is in the metallic phase and most Fe, in the oxidized phase. A dye-sensitized solar cell (DSSC) with only 5-s APPJ-processed PtFe counter electrode (CE) shows significantly improved efficiency. This suggests the rapid processing capability of the nitrogen DC-pulse APPJ. A PtFe prepared with higher H₂PtCl₆/Fe(NO₃)₃ volume ratio shows better catalytic performance, as confirmed by cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel experiments. The DSSC with APPJ-processed PtFe CE shows comparable efficiency to that of 15-min furnace-calcined Pt CE, suggesting that the APPJ processed PtFe requires less Pt.

中文翻译：

---

常压等离子体射流合成PtFe纳米化合物的电化学和微观结构研究

使用氮气直流脉冲大气压等离子体射流（APPJ）转化硝酸铁（Fe（NO ₃）₃）和氯铂酸（H ₂ PtCl ₆）在掺氟的氧化锡（FTO）衬底上将液态前驱物薄膜混合成PtFe纳米化合物。扫描透射电子显微镜显示纳米颗粒分布在FTO基板上的薄连续层上。APPJ合成的PtFe纳米化合物包含晶相和非晶相的混合物。X射线光电子能谱显示，大多数Pt处于金属相，而大多数Fe处于氧化相。仅用5 s APPJ处理的PtFe对电极（CE）的染料敏化太阳能电池（DSSC）显示出显着提高的效率。这表明氮气直流脉冲APPJ的快速处理能力。用较高的H ₂ PtCl ₆ / Fe（NO ₃）₃制备的PtFe循环伏安法，电化学阻抗谱和Tafel实验证实，体积比显示出更好的催化性能。采用APPJ处理的PtFe CE的DSSC的效率与15分钟的炉子煅烧Pt CE相当，这表明APPJ处理的PtFe需要更少的Pt。