过电位
催化作用
泥浆
原电池
材料科学
玻璃碳
过渡金属
旋转圆盘电极
化学工程
化学
电化学
无机化学
复合材料
有机化学
电极
物理化学
工程类
循环伏安法
作者
Joesene J. Soto Pérez,Armando Peña,Pedro Trinidad,G. Quintana,Xinbing Zhao,Kotaro Sasaki,Miguel José Yacamán,Rubén Mendoza‐Cruz,Carlos R. Cabrera
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-12-01
卷期号:5 (12): 15175-15187
标识
DOI:10.1021/acsaem.2c02843
摘要
Platinum-modified first-row transition-metal catalyst (M = Ni, Co, and Cu) nanoparticles on a carbon black Vulcan XC-72R (CBV) support were synthesized using rotating disk slurry electrodeposition (RoDSE) followed by spontaneous galvanic displacement (SGD) reactions. These RoDSE–SGD catalysts were evaluated for the oxygen reduction reaction (ORR) in 0.1 M KOH using rotating disk electrode techniques. The Ni and Co RoDSEs were done by using an electrochemical applied potential of −0.75 V versus the RHE and for Cu, −0.80 V versus the RHE using a CBV slurry solution containing 0.1 M KClO4. These metal nanoparticles on CBV (M/CBV) catalysts were modified with a Pt precursor via a spontaneous galvanic displacement (SGD) reaction, producing a Pt-M/CBV material to catalyze the ORR in an alkaline medium. High-resolution scanning transmission electron microscopy (HR-STEM) analysis indicates that the PtM/CBV samples include M clusters and Pt single atoms. The ORR characterization measurements were done under a controlled temperature (25.0 °C) and with a mass loading of 100 μg/cm2 on a glassy carbon (GC) rotating disk electrode at 1600 rpm. The PtCo/CBV showed the highest ORR mass activity of 0.741 A/mgPt at 0.90 V versus the reversible hydrogen electrode (RHE) compared with commercial Pt/CBV. The M/CBV RoDSE catalysts were also tested for the oxygen evolution reaction (OER), and Ni/CBV provided the lowest overpotential of 450 mV at 10 mA/cm2disk in 0.1 M KOH.
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