%0 Journal Article %T 用于电化学水氧化的铁、镍、钴金属及其二元金属纳米颗粒比较研究<br>Comparative Studies of Fe, Ni, Co and Their Bimetallic Nanoparticles for Electrochemical Water Oxidation %A Maduraiveeran Govindhan %A Brennan Mao %A 陈爱成< %A br> %A Maduraiveeran Govindhan %A Brennan Mao %A Aicheng Chen %J 电化学 %D 2017 %R 10.13208/j.electrochem.161247 %X 摘要 从环境兼容角度来设计应用于氧析出反应的电催化剂是否有效、耐用和廉价对能源转化过程至关重要. 本文报告了一种快速制备低成本、原料丰富的金属催化剂制备方法。通过一步电化学沉积法在钛金属基材上制备了铁、镍、钴金属及其钴镍、钴铁二元金属纳米颗粒. 采用场发射电子显微镜 (FE-SEM), 能量散射X-射线能谱 (EDX), X-射线衍射光谱 (XRD), X-射线光电子能谱 (XPS)和电化学技术对制备的不同纳米颗粒进行了表征. 电化学结果显示，在合成的五种钛基金属纳米催化剂中, 钛基上沉积钴金属纳米颗粒(Ti/Co)电极在0.l mol·L-1氢氧化钾溶液中氧析出反应的电催化活性最好，0.70 V(相对于银/氯化银电极)的电流密度为10.0 mA·cm-2. 经优化后Ti/Co电极的过电位(η)很小，当电流密度为10.0 mA·cm-2时η为0.43 V，质量活性高达105.7 A·g-1，逆转频率(TOF)值为1.63×10-3 s-1, 这些与当前最好的碳载铂(Pt/C)和氧化钌(RuO2)电催化剂的性能相当. 此外，通过计时电位技术对优化后Ti/Co电极的耐久性进行了测试, 发现该电极在碱性溶液中氧析出反应的稳定性良好. 本工作制备的钛金属基材上电化学沉积金属钴纳米颗粒具有高催化活性、高稳定性、原料来源丰富、廉价且易于大规模生产，在工业化水分解领域具有潜在的应用前景.<br>The design of efficient, durable, and earth-abundant electrocatalysts via environmentally compatible strategies for the oxygen evolution reaction (OER) is a vital for energy conversion processes. Herein we report a facile approach for the fabrication of low-cost and earth abundant metal catalysts, including iron (Fe), nickel (Ni), cobalt (Co), CoNi, and CoFe nanoparticles (NPs) on titanium (Ti) substrates through a one-step electrochemical deposition. Field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) spectrocopy, X-ray photoelectron spectroscopy (XPS), and electrochemical techniques were employed to characterize these nanoparticles. Our electrochemical results revealed that among the five synthesized nanomaterials, the Ti/Co electrode exhibited the highest electrocatalytic activity toward OER in 0.l mol·L-1 KOH with a current density of 10.0 mA·cm-2 at 0.70 V vs. Ag/AgCl. The optimized Ti/Co electrode exhibited a small overpotential (η) of 0.43 V at 10.0 mA·cm-2 and a high mass activity of 105.7 A·g-1 with a turnover frequency (TOF) value of 1.63×10-3 s-1, which are comparable to the values obtained with the state-of-the-art Pt/C and RuO2 electrocatalysts. In addition, the durability of the optimized Ti/Co electrode was tested using a chronopotentiometric technique, which revealed that the developed electrocatalyst possessed good stability for OER in an alkaline solution. The high catalytic activity, high stability, earth abundance, cost-effectiveness, and easy scale-up for mass production make the Co nanoparticles, which were electrochemically deposited on a Ti substrate, promising for industrial water splittin %K 钴纳米颗粒 %K 电化学沉积 %K 电催化剂 %K 氧气析出反应 %K 能量转换 %K < %K br> %K cobalt nanoparticle %K electrochemical deposition %K electrocatalyst %K oxygen evolution reaction %K energy conversion %U http://electrochem.xmu.edu.cn/CN/abstract/abstract10363.shtml