Role of Surface Area on the Performance of Iron Nickel Nanoparticles for the Oxygen Evolution Reaction (OER)
Role of Surface Area on the Performance of Iron Nickel Nanoparticles for the Oxygen Evolution Reaction (OER)
复制标题
表面积对铁镍纳米粒子析氧反应 (OER) 性能的影响
DOI：
10.1149/08511.0081ecst
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Greenlee, Lauren F
中科院分区：
文献类型：
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作者：
Acharya, Prashant;Burrow, James;Abolhassani, Mojtaba;Greenlee, Lauren F
铁镍复合电催化剂是近年来出现的碱性电解液中析氧反应的最佳候选催化剂。了解铁镍纳米颗粒的组成和形态的影响对于优化和增强电催化剂性能至关重要。物理表面积和电化学表面积（ECSA）都是形态的函数。在这项研究中，三种不同的铁镍纳米粒子催化剂的合成。三种催化剂基于形态（合金与核-壳）和组成（高与低稳定剂浓度）而变化。使用物理吸附分析仪对合成的铁镍纳米颗粒进行Brunauer-Emmett-Teller（BET）表面积分析，同时使用电化学阻抗谱（EIS）通过电容来量化ECSA。ECSA和BET结果的电催化剂过电位的比较表明，可用的表面积和纳米粒子的形态发挥作用的电催化活性。
Iron-nickel bimetallic electrocatalysts have recently emerged as some of the best candidates for the oxygen evolution reaction (OER) in alkaline electrolyte. Understanding the effects of composition and morphology of iron-nickel nanoparticles is crucial for optimization and enhanced electrocatalyst performance. Both physical surface area and electrochemical surface area (ECSA) are functions of morphology. In this study, three different iron-nickel nanoparticle catalysts were synthesized. The three catalysts were varied based on morphology (alloy versus core-shell) and composition (high versus low stabilizer concentration). Brunauer-Emmett-Teller (BET) surface area analysis was conducted on the synthesized iron-nickel nanoparticles using a physisorption analyzer while electrochemical impedance spectroscopy (EIS) was employed to quantify the ECSA by capacitance. Comparison of ECSA and BET results to electrocatalyst overpotential suggests both available surface area and nanoparticle morphology play roles in electrocatalytic activity.