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韩敏教授和包建春教授课题组在ACS APPLIED MATERIALS & INTERFACES发表研究论文

发布时间:17-07-02 13:06:43 文章来源:1 浏览次数: [ 字号:


Component-Controlled Synthesis of Necklace-Like Hollow NixRuy Nanoalloys as Electrocatalysts for Hydrogen Evolution Reaction
Zhang, CH (Zhang, Caihua)[ 1,2 ] ; Liu, Y (Liu, Ying)[ 1 ] ; Chang, YX (Chang, Yingxue)[ 1 ] ; Lu, YA (Lu, Yanan)[ 1 ] ; Zhao, SL (Zhao, Shulin)[ 1 ] ; Xu, DD (Xu, Dongdong)[ 1 ] ; Dai, ZH (Dai, Zhihui)[ 1 ] ; Han, M (Han, Min)[ 1,3 ]*(韩敏); Bao, JC (Bao, Jianchun)[ 1 ]*(包建春)

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Nanjing Forestry Univ, Coll Sci, Nanjing 210037, Jiangsu, Peoples R China
[ 3 ] Nanjing Univ, Nanjing Natl Lab Solid State Microstruct, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China

ACS APPLIED MATERIALS & INTERFACES,201705,9(20),17327-17337

Developing highly efficient and long-durable nanoalloy electrocatalysts toward the hydrogen evolution reaction (HER) are highly desirable for implementation of the water-splitting technique to prepare clean fuels. Though great progress has been achieved, controllable synthesis of hollow NixRuy nanoalloys with a wide component ratio range remains a challenge and their applications for HER have not been explored. Here, a series of necklace-like hollow NixRuy nanoalloys (Ni(72)Ru(2)s, Ni63Ru37 Ni43Ru57, and Ni29Ru71) are prepared using the galvanic replacement reaction between the Ni nanochains and RuCl3 center dot 3H(2)O and the hollowing process based on the Kirkendall effect. Electrochemical tests reveal that those NixRuy nanoalloys can efficiently catalyze HER in acidic media. Among them, the Ni43Ru57 nanoalloy exhibits the highest catalytic activity with an overpotential of 41 mV to attain a current density of -10 mA cm(-2), outperforming other NixRuy nanoalloys and close to commercial Pt/C. Additionally, its current density will exceed Pt/C catalyst as the overpotential surpasses 102 mV. Moreover, such Ni43Ru57 nanoalloy also shows an exceptional durability that can continuously work for 8 h only with a little loss of activity. Deduced from some featured spectroscopic and electrochemical analysis, the excellent catalytic performance of Ni43Ru57 nanoalloy is attributed to the proper component ratio and effective electronic coupling of Ni and Ru, causing the faster interfacial electron transfer kinetics and more available active sites on it compared with other NixRuy nanoalloy ones.


文章链接:
http://pubs.acs.org/doi/abs/10.1021/acsami.7b01114
 


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