石墨毡上的镍铁层状双氢氧化物纳米片阵列：一种用于碱性介质中高效水氧化的三维电催化剂。
NiFe Layered-Double-Hydroxide Nanosheet Arrays on Graphite Felt: A 3D Electrocatalyst for Highly Efficient Water Oxidation in Alkaline Media.
作者信息
Ding Peng, Meng Chuqian, Liang Jie, Li Tingshuai, Wang Yan, Liu Qian, Luo Yonglan, Cui Guanwei, Asiri Abdullah M, Lu Siyu, Sun Xuping
机构信息
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
出版信息
Inorg Chem. 2021 Sep 6;60(17):12703-12708. doi: 10.1021/acs.inorgchem.1c01783. Epub 2021 Aug 6.
It is of great importance to rationally design and develop earth-abundant nanocatalysts for high-efficiency water electrolysis. Herein, NiFe layered double hydroxide was in situ grown hydrothermally on a 3D graphite felt (NiFe LDH/GF) as a high-efficiency catalyst in facilitating the oxygen evolution reaction (OER). In 1.0 M KOH, NiFe LDH/GF requires a low overpotential of 214 mV to deliver a geometric current density of 50 mA cm (η = 214 mV), surpassing that NiFe LDH supported on a 2D graphite paper (NiFe LDH/GP; η = 301 mV). More importantly, NiFe LDH/GF shows good durability at 50 mA cm within 50 h of OER catalysis testing and delivers a faradaic efficiency of nearly 100% in the electrocatalysis of OER.
合理设计和开发用于高效水电解的储量丰富的纳米催化剂具有重要意义。在此，通过水热法在三维石墨毡上原位生长了镍铁层状双氢氧化物（NiFe LDH/GF），作为促进析氧反应（OER）的高效催化剂。在1.0 M KOH中，NiFe LDH/GF在提供50 mA cm的几何电流密度时需要214 mV的低过电位（η = 214 mV），超过了负载在二维石墨纸上的NiFe LDH（NiFe LDH/GP；η = 301 mV）。更重要的是，NiFe LDH/GF在OER催化测试的50小时内，在50 mA cm下表现出良好的耐久性，并且在OER的电催化中提供了近100%的法拉第效率。
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