Double-Layered Catalyst Generates More Hydrogen
upstart writes:
Double-layered catalyst generates more hydrogen:
Recently published as a supplementary cover of the Journal of the American Chemical Society, this study was conducted by a POSTECH research team led by Professor In Su Lee, Research Professor Soumen Dutta, and Dr. Yu-Rim Hong (of the Department of Chemistry) in collaboration with Professor Si-Young Choi (Department of Materials Science and Engineering) and Professor Jeong Woo Han (Department of Chemical Engineering).
Platinum combines well with hydrogen and is often regarded as the best catalyst for hydrogen generation. However, because the water decomposition ability of platinum is poor, research has been conducted to improve this ability by combining platinum with iron and nickel hydroxide.
Professor In Su Lee team has already synthesized a sandwich-type hybrid material in which two-dimensional (2D) NiFe hydroxide nanoplates are sandwiched between porous 2D platinum nanoplates. This material was prepared via an inventive way of growing a platinum layer of ~1 nm on the surface of NiFe hydroxide with a thickness of several nanometers (nm; 1 nm = 1 billionth of a meter).
In this study, a method for synthesizing the platinum layer by separate thinning was used. This was done to overcome the limitation of the uneven growth of platinum layer on the NiFe hydroxide surface. The researchers ensured that both the upper and lower crystal planes of platinum grew as a flat surface in a confined 2D nanospace to react more effectively with iron and nickel hydroxide. In this catalyst, a complementary effect occurs between NiFe hydroxide and platinum, which are closely attached at a wide interface.
Journal Reference:
Yu-Rim Hong, Soumen Dutta, Sun Woo Jang, et al. Crystal Facet-Manipulated 2D Pt Nanodendrites to Achieve an Intimate Heterointerface for Hydrogen Evolution Reactions. J. Am. Chem. Soc., 2022; 144 (20): 9033
DOI: 10.1021/jacs.2c01589
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