电催化剂
过电位
析氧
塔菲尔方程
层状双氢氧化物
材料科学
石墨氮化碳
化学工程
分解水
混合材料
催化作用
无机化学
纳米技术
电化学
电极
化学
物理化学
光催化
有机化学
工程类
作者
Gui Chen,Jiang Liu,Ying Li,Anand Parkash,Wei Wu,Yu Chen,Chunli Xu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2019-09-20
卷期号:30 (49): 494001-494001
被引量:12
标识
DOI:10.1088/1361-6528/ab3e28
摘要
NiFeCr layered double hydroxides (NiFeCr-LDHs) supported on graphitic carbon nitride (g-C3N4) hybrids (NiFeCr-LDHs/g-C3N4) are synthesized and used as an electrocatalyst for oxygen evolution reaction (OER) in alkaline media. Effect of g-C3N4 on the structure and OER performance of NiFeCr-LDHs are investigated in detail. g-C3N4 can promote the formation of thin NiFeCr-LDHs nanosheets, thereby enhancing both the number of active sites and OER activity. X-ray photoelectron spectra measurements confirm the electronic interaction between g-C3N4 and NiFeCr-LDHs nanosheets. The OER performance of NiFeCr-LDHs/g-C3N4 hybrids highly relates to the weight ratio of g-C3N4 to NiFeCr-LDHs. When the weight ratio of g-C3N4 to NiFeCr-LDHs is 5%, the corresponding electrocatalyst shows the best OER activity. The component optimized NiFeCr-LDHs/g-C3N4 hybrids display the overpotential of ∼223 mV at 10 mA cm-2 and Tafel slope of 89 mV dec-1 for OER in 1 M KOH solution, which is better than that of pristine NiFeCr-LDHs, bare g-C3N4, and commercial RuO2.
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