Compositional Optimization of Alloy Fe x Ni y (OH) 2 Nanoparticles for Alkaline Electrochemical Oxygen Evolution
Compositional Optimization of Alloy Fe x Ni y (OH) 2 Nanoparticles for Alkaline Electrochemical Oxygen Evolution
复制标题
碱性电化学析氧合金Fe x Ni y (OH) 2 纳米粒子的成分优化
DOI：
10.1149/07709.0025ecst
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Nelson, Zachary
中科院分区：
文献类型：
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作者：
Greenlee, Lauren F;Acharya, Prashant;Nelson, Zachary
合成了FeNi合金纳米粒子，并将其作为碱性电解液中析氧反应的电催化剂。电子显微镜成像表明纳米颗粒形成球形形态，并且初始元素分析表明在纳米颗粒中有显著的氧含量。在合成的纳米颗粒中，Fe：Ni的摩尔比范围为5：1至1：5。还评价了聚乙烯吡咯烷酮稳定剂对纳米颗粒性能的影响。随着Fe：Ni摩尔比和PVP：Ni摩尔比的降低，纳米粒子的催化性能提高。以Fe：Ni比为1：5和PVP：Ni比为0.001合成的合金纳米颗粒在10 mA/cm 2下的过电位为295 mV，塔菲尔斜率为40 mV/dec，在1.6 V（相对于RHE）下的质量活性为3343 mA/mg。
Alloy FeNi nanoparticles were synthesized and evaluated as electrocatalysts for the oxygen evolution reaction in alkaline electrolyte. Electron microscopy imaging indicates nanoparticles were formed with a spherical morphology, and initial elemental analysis suggests significant oxygen content in the bimetallic particles. A molar ratio range from 5: 1 to 1: 5 Fe: Ni in the assynthesized nanoparticles was tested. The effect of polyvinylpyrrolidone stabilizer on nanoparticle performance was also evaluated. Catalytic performance of the nanoparticles increased with decreasing Fe: Ni molar ratio and PVP: Ni molar ratio. Alloy nanoparticles synthesized with a Fe: Ni ratio of 1: 5 and a PVP: Ni ratio of 0.001 resulted in an overpotential of 295 mV at 10 mA/cm2, a Tafel slope of 40 mV/dec, and a mass-based activity of 3343 mA/mg at 1.6 V vs. RHE.