Feng Yiling, Han Wei, Wang Tingyu, Chen Qian, Zhang Yan, Sun Yonggang, Zhang Xin, Yang Lin, Chen Song, Xu YuXiang, Tang Hong, Zhang Bing, Wang Hao
School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China.
School of Chemistry and Chemical Engineering, Guizhou Minzu University, Guizhou, China.
Front Chem. 2022 May 31;10:885965. doi: 10.3389/fchem.2022.885965. eCollection 2022.
Alloys and core-shell nanoparticles have recently received enormous attention which opened up new avenues for highly active catalysts. Despite considerable advances in this field, the majority of proposed approaches suffer from either complicated procedures or unstable structures, severely hindering their practical applications. Here, we successfully synthesized alloy electrocatalyst with separated phases, PtRu alloy nanoparticles robustly supported by carbon matrix (PtRu/C), using a convenient two-step solvothermal method. The constructed PtRu/C at different NaOH contents (0-1.25 mmol) were compared and electrochemical activity were evaluated by the hydrogen oxidation reaction (HOR). In contrast, the homogeneous distribution and minimum average size of Ru and Pt nanoparticles on carbon, appeared at approximately 4 nm, proving that PtRu/C-0.75 possessed abundant accessible active sites. The catalytic activities and the reaction mechanism were studied via electrochemical techniques. PtRu/C-0.75 has excellent activity due to its unique electronic structure and efficient charge transfer, with the largest j value of 3.68 mA cm in the HOR.
合金和核壳纳米粒子最近受到了极大的关注，这为高活性催化剂开辟了新途径。尽管该领域取得了相当大的进展，但大多数提出的方法要么程序复杂，要么结构不稳定，严重阻碍了它们的实际应用。在此，我们使用简便的两步溶剂热法成功合成了具有分离相的合金电催化剂，即由碳基质（PtRu/C）牢固支撑的PtRu合金纳米粒子。比较了在不同NaOH含量（0 - 1.25 mmol）下构建的PtRu/C，并通过氢氧化反应（HOR）评估了其电化学活性。相比之下，Ru和Pt纳米粒子在碳上的均匀分布以及最小平均尺寸约为4 nm，证明PtRu/C - 0.75具有丰富的可及活性位点。通过电化学技术研究了催化活性和反应机理。PtRu/C - 0.75因其独特的电子结构和高效的电荷转移而具有优异的活性，在HOR中j值最大为3.68 mA cm 。
