Three-dimensional open nano-netcage electrocatalysts for efficient pH-universal overall water splitting.

ABSTRACT: High-efficiency water electrolysis is the key to sustainable energy. Here we report a highly active and durable RuIrO_x (x ≥ 0) nano-netcage catalyst formed during electrochemical testing by in-situ etching to remove amphoteric ZnO from RuIrZnO_x hollow nanobox. The dispersing-etching-holing strategy endowed the porous nano-netcage with a high exposure of active sites as well as a three-dimensional accessibility for substrate molecules, thereby drastically boosting the electrochemical surface area (ECSA). The nano-netcage catalyst achieved not only ultralow overpotentials at 10 mA cm^-2 for hydrogen evolution reaction (HER; 12 mV, pH = 0; 13 mV, pH = 14), but also high-performance overall water electrolysis over a broad pH range (0 ~ 14), with a potential of m

SUBMITTER: Zhuang Z 

PROVIDER: S-EPMC6814841 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature