Multimetallic Hollow Mesoporous Nanospheres with Synergistically Structural and Compositional Effects for Highly Efficient Ethanol Electrooxidation

Lv, H (Lv, Hao)[ 1 ] ; Lopes, A (Lopes, Aaron)[ 2 ] ; Xu, DD (Xu, Dongdong)[ 1 ]*（许冬冬） ; Liu, B (Liu, Ben)[ 1 ]*（刘犇）

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China

[ 2 ] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

ACS CENTRAL SCIENCE，201810,4(10),1412-1419

Controlling the nanostructures and chemical compositions of the electrochemical nanocatalysts has been recognized as two prominent means to kinetically promote the electrocatalytic performance. Herein, we report a general "dual"-template synthesis methodology for the formation of multimetallic hollow mesoporous nanospheres (HMSs) with an adjustable interior hollow cavity and cylindrically opened mesoporous shell as a highly efficient electrocatalyst for ethanol oxidation reaction. Three-dimensional trimetallic PdAgCu HMSs were synthesized via in situ coreduction of Pd,Ag, and Cu precursors on "dual"-template structural directing surfactant of dioctadecyldimethylammonium chloride in optimal synthesis conditions. Due to synergistic advantages on hollow mesoporous nanostructures and multimetallic compositions, the resultant PdAgCu HMSs exhibited significantly enhanced electrocatalytic performance toward ethanol oxidation reaction with a mass activity of 5.13 A mg(Pd)(-1) at a scan rate of 50 mV s(-1) and operation stability (retained 1.09 A mg(pd)(-1) after the electrocatalysis). The "dual"-template route will open a new avenue to rationally design multimetallic HMSs with controlled functions for broad applications.

文章链接：

https://pubs.acs.org/doi/10.1021/acscentsci.8b00490