气候变化领域集成服务门户(CCPortal): Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction

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DOI	10.1016/j.scib.2021.02.033
	Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction
	Chen J.; Long Q.; Xiao K.; Ouyang T.; Li N.; Ye S.; Liu Z.-Q.
发表日期	2021
ISSN	20959273
起始页码	1063
结束页码	1072
卷号	66 期号:11
英文摘要	Layered double hydroxides (LDHs) with decent oxygen evolution reaction (OER) activity have been extensively studied in the fields of energy storage and conversion. However, their poor conductivity, ease of agglomeration, and low intrinsic activity limit their practical application. To date, improvement of the intrinsic activity and stability of NiFe-LDHs through the introduction of heteroatoms or its combination with other conductive substrates to enhance their water-splitting performance has drawn increasing attention. In this study, vertically interlaced ternary phosphatised nickel/iron hybrids grown on the surface of titanium carbide flakes (NiFeP/MXene) were successfully synthesised through a hydrothermal reaction and phosphating calcination process. The optimised NiFeP/MXene exhibited a low overpotential of 286 mV at 10 mA cm−2 and a Tafel slope of 35 mV dec−1 for the OER, which exceeded the performance of several existing NiFe-based catalysts. NiFeP/MXene was further used as a water-splitting anode in an alkaline electrolyte, exhibiting a cell voltage of only 1.61 V to achieve a current density of 10 mA cm−2. Density functional theory (DFT) calculations revealed that the combination of MXene acting as a conductive substrate and the phosphating process can effectively tune the electronic structure and density of the electrocatalyst surface to promote the energy level of the d-band centre, resulting in an enhanced OER performance. This study provides a valuable guideline for designing high-performance MXene-supported NiFe-based OER catalysts. © 2021 Science China Press
关键词	Electronic structure NiFe phosphide Oxygen evolution reaction Phosphating Titanium carbide (MXene)
英文关键词	Binary alloys; Density functional theory; Electrocatalysts; Electrolytes; Iron alloys; Oxygen; Substrates; Titanium carbide; Conductive substrates; Electronic.structure; Evolution reactions; Intrinsic activities; Layered-double hydroxides; Nife phosphide; Oxygen evolution; Performance; Phosphating; Titania carbide (mxene); Electronic structure
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207361
作者单位	School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology, Maoming, 525000, China; Huangpu Hydrogen Innovation Center, Guangzhou University, Guangzhou, 510006, China
推荐引用方式 GB/T 7714	Chen J.,Long Q.,Xiao K.,et al. Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction[J],2021,66(11).
APA	Chen J..,Long Q..,Xiao K..,Ouyang T..,Li N..,...&Liu Z.-Q..(2021).Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction.Science Bulletin,66(11).
MLA	Chen J.,et al."Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction".Science Bulletin 66.11(2021).