posted on 2020-07-30, 13:04authored bySun Woo Jang, Soumen Dutta, Amit Kumar, Yu-Rim Hong, Hanuel Kang, Shinbi Lee, Sunmin Ryu, Wonyong Choi, In Su Lee
Next-generation
electrocatalysts with smart integrated designs,
maximizing the chemical cascade synergy for sustainable hydrogen production,
are needed to address the urgent environmental threats, but scalable
synthesis of precisely architectured nanohybrids rendering a few-nanometer
interfacial controllability to augment the catalytic reactivity and
operational stability is a major bottleneck. Herein, by inventing
a surface-confined lateral growth of nanometer-thin and nanoporous
two-dimensional (2D)-Pt on NiFe-LDH nanosheets, a highly reactive
2D–2D interfacially integrated nanoplatform is synthesized
for an alkaline hydrogen evolution reaction (HER) which not only extracts
high Pt-atomic utilization efficiency but also synergistically accelerates
the water dissociation and hydrogen generation cascade on the colocalized
Pt/M(OH)x active sites, endowing a 6.1-fold
higher Pt mass activity than 20% Pt/C and also empowers a record-high
HER operational stability for 50 h, due to the chemically enforced
lamellar architecture. This work offers a gateway to produce active
metal nanosheets tailored with a suitable active-template surface
in order to invent and enforce futuristic catalysis technologies.