Cobalt Nanoparticles Modified Single-Walled Titanium Carbonitride Nanotube Derived from Solid-Solid Separation for Oxygen Reduction Reaction in Alkaline Solution

doi:10.1007/s12678-020-00614-x

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	Cobalt Nanoparticles Modified Single-Walled Titanium Carbonitride Nanotube Derived from Solid-Solid Separation for Oxygen Reduction Reaction in Alkaline Solution
	Rasaki, Sefiu Abolaji ; Chen, Zhangwei ; Shen, Hangjia ; Guo, Haichuan ; Thomas, Tiju ; Yang, Minghui
刊名	ELECTROCATALYSIS
	2020
卷号	11 期号:6 页码:579-592
关键词	CATALYST NITRIDE CARBIDE CO ELECTROCATALYST NANOCRYSTALS ADSORPTION STABILITY EVOLUTION EFFICIENT
DOI	10.1007/s12678-020-00614-x
英文摘要	Titanium carbonitrides have promising catalytic properties for oxygen reduction reaction (ORR). However, its synthesis normally requires high temperatures (1200-1800 degrees C), thus limiting research carried-out on them. The catalytic properties of the carbonitrides have so far been improved through post-synthesis partial surface oxidation. This makes the entire process of making the desired catalyst cumbersome and complex. In this work, cobalt-modified single-walled titanium carbonitride nanotube (Co@TiC0.25N0.75) is synthesized via solvothermal method followed by solid-solid separation process. The problem of high temperature required for TiCN synthesis is successfully overcome, and a Co doping strategy is used to improve its catalytic performance. Different mass ratios of Co nanoparticles are loaded onto TiC0.25N0.75. It discovers that only a fraction of the Co dissolves at TiC0.25N0.75 lattice due to the solubility limit being similar to 0.98%. The remaining fraction of Co is found at the wall of the TiC0.25N0.75. The Co nanoparticles at the TiC0.25N0.75 wall complement the catalytic activity, while the dissolved Co at its lattice acts as active site modifier by increasing the proportion of Ti 2p(3/2) in the low valence state. In alkaline solution, 10%Co@TiC0.25N0.75 shows appreciable ORR activity with onset and half-wave potential located at 0.85 and 0.73 V respectively; the performance is higher than that of TiN (0.69 and 0.55 V) and single-phase TiC0.25N0.75(0.74 and 0.62 V). The results indicate that a charge transfer occurred between Co and TiC0.25N0.75 due to strong coupling effect. This gives a catalyst with appreciable ORR activity and stability.
学科主题	Chemistry ; Electrochemistry
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20637]
专题	2020专题
作者单位	1.Thomas, T (corresponding author), Indian Inst Technol Madras Adyar, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India. 2.Yang, MH (corresponding author), Chinese Acad Sci, Solid State Funct Mat Res Lab, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Rasaki, Sefiu Abolaji,Chen, Zhangwei,Shen, Hangjia,et al. Cobalt Nanoparticles Modified Single-Walled Titanium Carbonitride Nanotube Derived from Solid-Solid Separation for Oxygen Reduction Reaction in Alkaline Solution[J]. ELECTROCATALYSIS,2020,11(6):579-592.
APA	Rasaki, Sefiu Abolaji,Chen, Zhangwei,Shen, Hangjia,Guo, Haichuan,Thomas, Tiju,&Yang, Minghui.(2020).Cobalt Nanoparticles Modified Single-Walled Titanium Carbonitride Nanotube Derived from Solid-Solid Separation for Oxygen Reduction Reaction in Alkaline Solution.ELECTROCATALYSIS,11(6),579-592.
MLA	Rasaki, Sefiu Abolaji,et al."Cobalt Nanoparticles Modified Single-Walled Titanium Carbonitride Nanotube Derived from Solid-Solid Separation for Oxygen Reduction Reaction in Alkaline Solution".ELECTROCATALYSIS 11.6(2020):579-592.