ja6b11218_si_001.pdf (1.88 MB)
Ultrafine Pt Nanoclusters Confined in a Calixarene-Based {Ni24} Coordination Cage for High-Efficient Hydrogen Evolution Reaction
journal contribution
posted on 2016-12-08, 00:00 authored by Shentang Wang, Xiaohui Gao, Xinxin Hang, Xiaofei Zhu, Haitao Han, Wuping Liao, Wei ChenTo obtain stable
and ultrafine Pt nanoclusters, a trigonal prismatic
coordination cage with the sulfur atoms on the edges was solvothermally
synthesized to confine them. In the structure of {Ni24(TC4A-SO2)6(TDC)12 (H2O)6} (H4TC4A-SO2 = p-tert-butylsulfonylcalix[4]arene;
H2TDC = 2,5-thiophenedicarboxylic acid), three Ni4-(TC4A-SO2) SBUs are bridged by three TDC ligands into
a triangle and two such triangles are pillared by three pairs of TDC
ligands to form a trigonal prism. The cage cavity has 12 sulfur atoms
on the surface. Because of the porous structure and strong covalent
interaction between metal and sulfur, ultrafine Pt nanoclusters composed
of less than ∼18 Pt atoms can be facilely confined in the present
trigonal prismatic cage (Pt@CIAC-121). The as-synthesized
Pt NCs exhibit higher electrocatalytic activity than commercial Pt/C
toward hydrogen evolution reaction.