镍铁氢氧化物中空纳米管电催化析氧性能研究
Electrocatalytic OER Performance of Nickel-Iron Hydroxide Hollow Nanotubes
DOI: 10.12677/MS.2022.124042, PDF,    国家自然科学基金支持
作者: 李清影, 郑志成：中南大学材料科学与工程学院，湖南 长沙
关键词: 镍铁层状氢氧化物；中空纳米管；电催化；析氧反应；Nickel-IronLayered Hydroxide； Hollow Nanotube； Electrocatalysis； Oxygen Evolution Reaction
摘要: 电催化整体水分解是目前实现氢能源大规模生产最有前景的可持续方法之一，但是受到析氧反应(OER)动力学缓慢的限制，较大的能量转换损耗使其工业成本较高。开发用于替代贵金属基催化剂的高效、低成本的OER电催化剂迫在眉睫。本文采用一种简单地牺牲模板法，制备了一系列具有不同元素组成的二元氢氧化物中空纳米管，利用元素协同作用和空间结构优势提升催化效果。其中NiFe氢氧化物纳米管展现出最佳的电催化性能，10 mA∙cm-2下的过电位仅需270.5 mV，Tafel斜率仅为80.8 mV∙dec-1。同时电化学表征结果显示，中空纳米管特殊的分层片状结构可以提供高额电化学活性面积，同时镍铁之间的协同作用可以有效提高材料的本征活性。
Abstract: Electrocatalytic overall water splitting is currently one of the most promising sustainable methods for large-scale production of hydrogen energy. However, limited by the slow kinetics of the oxygen evolution reaction (OER), large energy conversion losses make it more expensive for industrial application. The development of an efficient and low-cost OER electrocatalyst to replace a noble metal-based catalyst is imminent. In this paper, a series of binary hydroxide hollow nanotubes with different element compositions were prepared by a simple sacrificial template method, among which the NiFe hydroxide nanotubes exhibited the best electrocatalytic performance, reaching a current density of 10 mA∙cm-2 with the lowest overpotential of only 270.5 mV and a Tafel slope of only 80.8 mV∙dec-1. The special layered nanotube structure of the nanotubes can provide a high area of electrochemical activity, while the synergy between nickel-iron can effectively improve the intrinsic activity of the material.
文章引用：李清影, 郑志成. 镍铁氢氧化物中空纳米管电催化析氧性能研究[J]. 材料科学, 2022, 12(4): 396-408. https://doi.org/10.12677/MS.2022.124042

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