Ultrathin palladium nanosheets with selectively controlled surface facets
Xu, DD (Xu, Dongdong)[ 1 ] ; Liu, XL (Liu, Xiaoli)[ 1 ] ; Lv, H (Lv, Hao)[ 1 ] ; Liu, Y (Liu, Ying)[ 1 ] ; Zhao, SL (Zhao, Shulin)[ 1 ] ; Han, M (Han, Min)[ 1 ] ; Bao, JC (Bao, Jianchun)[ 1 ]*(包建春); He, J (He, Jie)[ 2 ]*; 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 ] Univ Connecticut, Inst Mat Sci, Dept Chem, Storrs, CT 06269 USA
CHEMICAL SCIENCE,201805,9(19), 4451-4455
We report a facile bottom-up synthetic approach to preparing ultrathin two-dimensional (2D) palladium nanosheets (PdNSs) with selectively exposed surface facets. Our synthetic strategy is based on the utilization of the nanoconfined lamellar mesophases of amphiphilic functional surfactants to template the growth of PdNSs in aqueous solution. Preferential adsorption of functional groups (e. g., COOH, pyridyl and quaternary ammonium) and halide counter ions (e. g., Br and Cl ) in the long-chain surfactants onto different Pd planes results in the epitaxial growth of {100}, {110} and {111}-exposed surface facets of ultrathin PdNSs. Our synthetic approach is a general, powerful and scalable method to precisely control the surface facets of ultrathin 2D PdNSs, thus providing an opportunity to evaluate facet-dependent catalytic performance of Pd nanocrystals. Ultrathin PdNSs have been examined as the electrocatalysts for hydrogen evolution reactions (HERs). We show that {100}-exposed PdNSs display superior catalytic activity and stability for HERs, compared to that of {110} and {111}-exposed ones as well as their bulk counterparts. Conceivably, our findings will offer a general guideline in rational design of surfactant templates for other 2D metal nanosheets.
文章链接:
http://pubs.rsc.org/en/content/articlepdf/2018/sc/c8sc00605a
版权与免责声明:本网页的内容由收集互联网上公开发布的信息整理获得。目的在于传递信息及分享,并不意味着赞同其观点或证实其真实性,也不构成其他建议。仅提供交流平台,不为其版权负责。如涉及侵权,请联系我们及时修改或删除。邮箱:sales@allpeptide.com