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Updated: Sep 9, 2025
Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
Hierarchical Pd Nanoclusters/CuCoAl-LDH/Graphene Catalyst: Pd-Cu2O Synergistic Enhancement Effect for Highly Improved
Zhuojun Wei1, Yanan Yu1, An Feng1
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
Abstract:
A series of Pd nanocluster (PdNC) catalysts x-PdNCs/CuCoAl(O)/rGO-T (x: Pd loading (= 0.04-0.24 wt %), T = 260-340 °C) are synthesized by loading water-soluble captopril-protected PdNCs on CuCoAl-layered-double-hydroxide/reduced-graphene-oxide using electrostatic adsorption followed by proper calcinations. The catalysts possess nanosheet array-like structures with PdNCs (∼1.4-2.0 nm) uniformly dispersed on the CuCoAl(O) nanosheet edges decorated with Cu2O nanoparticles (2.65-3.95 nm). All catalysts exhibit outstanding catalytic activities for 4-nitrophenol (4-NP) reduction, especially the 0.1-PdNCs/CuCoAl(O)/rGO-300 with the highest TOF value of 76,608 h-1, which is 2.5-folds higher than the 0.17-PdNCs/CoAl(O)/rGO-300 without Cu doping and obviously superior to most reported noble-metal catalysts. Meantime, the 0.1-PdNCs/CuCoAl(O)/rGO-300 exhibits an excellent cycling stability with complete conversion of 4-NP in 60 s after 40 successive runs without removing the product. The present catalyst also exhibits good universality for a variety of nitroaromatics and organic dyes. Moreover, the 0.1-PdNCs/CuCoAl(O)/rGO-300 shows outstanding catalytic activity in continuous flow reactions via a simulated fixed-bed test. The superior catalytic performance can be attributed to the ultrafine electron-enriched PdNCs, the electron promotion of Cu2O nanoparticles, and the PdNCs-CuCoAl(O)-rGO three-phase synergistic effect. The present work offers novel insight into the design and synthesis of supported noble-metal catalysts in a large variety of applications.
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