Abstract: Nanoporous Ni was prepared by a combined method of rapid quenching and de-alloying, and then prepared samples were heated to synthesize the nanoporous NiO. The phase, morphology, microstructure and pore-size distribution of nanoporous Ni and NiO were analyzed by XRD, SEM, TEM, BET respectively.The electrochemical performance was investigated by cyclic voltammetry, electrochemical steady-state polarization and electrochemical impendence spectroscopy (EIS). The results showed that nanoporous Ni could be obtained after de-alloying of Ni15Al85 and Ni5Al95 alloy. The bore diameter and skeleton strength of Ni decreased as the Al content increased. Under the current density of 10 mA·cm-2, oxygen evolution reaction overpotential of nanoporous Ni drove from Ni5Al95 alloy was 95 mV lower than nanoporous Ni from Ni15Al85 alloy. However, with the reaction proceeded, collapse and detachment of the surface holes reduced the stability of oxygen evolution. NiO inherited the nanoporous structure of Ni, and further increased the specific surface area and skeleton strength of the electrode. Under the current density of 10 mA·cm-2, oxygen evolution reaction overpotential of nanoporous NiO electrode was only 357 mV, which lower than Ni electrode 14.3 mV. The apparent exchange current density of NiO electrode toward the OER was 1.2 times as high as that of nickel electrode in room temperature, the apparent activation energy reduced 8.59 kJ·mol-1, after 1 000 cycles, overpotential of NiO minished 12 mV (J=100 mA·cm-2), nanoporous NiO drove from Ni5Al95 alloy had superior electrocatalytic properties toward the oxygen evolution reaction and favorable stability.
Chang J F, Yao X, Luo Z Y, et al. Acta Physico-Chimica Sinica, 2016, 32(7),1556(in Chinese).常进法, 肖瑶, 罗兆艳,等. 物理化学学报, 2016, 32(7),1556.
[2]
Gao X S. Preparation and performance of mesoporous binary metal oxide nanorods as oxygen evolution catalyst. Master’s Thesis, Taiyuan University of Technology, China, 2017(in Chinese).高旭升. 介孔二元金属氧化物纳米棒析氧催化剂的制备及性能研究.硕士学位论文, 太原理工大学, 2017.
[3]
Peng L,Shah S S A, Wei Z. Chinese Journal of Catalysis, 2018,10, 1575.
[4]
Koper M T M. Journal of Electroanalytical Chemistry, 2011, 660(2),254.
[5]
Gong M, Dai H. Nano Research, 2015, 8(1),23.
[6]
Lee Y, Jin S, May K J, et al. Journal of Physical Chemistry Letters, 2015, 3(3),399.
[7]
Xu L, Jiang Q, Xiao Z, et al. Angewandte Chemie International Edtion, 2016, 55(17),5277.
[8]
Du S, Ren Z, Zhang J, et al. Chemical Communications, 2015, 51(38),8066.
[9]
Mccrory C C, Jung S, Peters J C, et al. Journal of the American Chemical Society, 2013, 135(45),16977.
[10]
Lyons M E G, Brandon M P. International Journal of Electrochemical Scie-nce, 2008, 3(12), 1425.
[11]
Hou Y, Lohe M R, Zhang J, et al. Energy & Environmental Science, 2015, 9(2),478.
[12]
Li Z P. The research on cobalt and nickel sulfides supported carbon nanotubes catalysts for oxygen evolution reaction of the water electrolysis. Master’s Thesis, South China University of Technology, China, 2014(in Chinese).李钟平. 碳纳米管负载钴、镍硫化物催化剂电解水析氧的研究. 硕士学位论文,华南理工大学, 2014.
[13]
Subbaraman R, Tripkovic D, Chang K C, et al. Nature Materials, 2012, 11(6),550.
[14]
Xiao Y, Feng L, Hu C, et al. RSC Advances, 2015, 5(76),61900.
[15]
Ding Y. Journal of Shandong University, 2011, 46(10),121 (in Chinese).丁轶. 山东大学学报, 2011, 46(10),121.
[16]
Fang X M, Lian L X, Liu Y, et al. Rare Metal Materials & Engineering, 2014, 43(11),2753(in Chinese).方秀梅, 连利仙, 刘颖,等. 稀有金属材料与工程, 2014, 43(11),2753.
[17]
Cao F, Zhang W, Zhang S, et al. Materials Review A:Review Papers, 2017, 31(11),139(in Chinese).曹凤, 张文彦, 张思思,等. 材料导报:综述篇, 2017, 31(11),139.
[18]
Zhou Q, Zheng B, Li Z Y, et al. Chinese Journal of Inorganic Chemistry, 2017, 33(8),1416(in Chinese).周琦, 郑斌, 李志洋,等.无机化学学报, 2017, 33(8),1416.
[19]
Wang X, Qi Z, Zhao C, et al. Journal of Physical Chemistry C, 2009, 113(30),13139.
[20]
Babar P T, Lokhande A C, Gang M G, et al. Journal of Industrial & Engineering Chemistry, DOI.org/10.1016/j.jiec.2017.11.037.
[21]
Li J, Luo F, Zhao Q, et al. Journal of Materials Chemistry A, 2014, 2(13),4690.
[22]
Manders J R, Tsang S, Hartel M J, et al. Advanced Functional Mate-rials, 2013, 23(23),2993.
[23]
Chen G. Study on the synthesis and properties of NiO-based electrode materials for supercapacitors. Ph.D. Thesis, Yunnan University, China, 2016(in Chinese).陈刚. 基于NiO超级电容器电极材料的制备及其性能研究.博士学位论文,云南大学, 2016.
[24]
Liu Y, Hua X, Xiao C, et al. Journal of the American Chemical Society, 2016, 138(15),5087.
[25]
Zhu L, Cai Q, Liao F, et al. Electrochemistry Communications, 2015, 52(15),29.