Sulfur-mediated transformation from osmium nanocrystals to single atoms for efficient alkaline hydrogen evolution reaction.

ABSTRACT: Osmium (Os)-based catalysts, recognized for their unique chemical and electronic properties along with cost-effectiveness, hold great potential for the hydrogen evolution reaction (HER). However, their practical application has long been limited because pure Os exhibits excessively strong adsorption of intermediates and suffers from stability issues. Herein, we report the development of a highly stable catalyst achieved by implanting the sulfur (S) atom into the matrix, facilitating the transformation of Os nanocrystals into Os single atoms. The prepared atomically dispersed Os catalyst (Os-SA@SNC) demonstrates outstanding catalytic activity, requiring only a 13 mV overpotential to achieve a current density of 10 mA cm^-2 in 1.0 M potassium hydroxide (KOH) solution, as well as th

SUBMITTER: Xue W 

PROVIDER: S-EPMC12260528 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature