Morphology and surface chemistry engineering toward pH-universal catalysts for hydrogen evolution at high current density.

ABSTRACT: Large-scale implementation of electrochemical hydrogen production requires several fundamental issues to be solved, including understanding the mechanism and developing inexpensive electrocatalysts that work well at high current densities. Here we address these challenges by exploring the roles of morphology and surface chemistry, and develop inexpensive and efficient electrocatalysts for hydrogen evolution. Three model electrocatalysts are flat platinum foil, molybdenum disulfide microspheres, and molybdenum disulfide microspheres modified by molybdenum carbide nanoparticles. The last catalyst is highly active for hydrogen evolution independent of pH, with low overpotentials of 227 mV in acidic medium and 220 mV in alkaline medium at a high current density of 1000 mA cm^-2, beca

SUBMITTER: Luo Y 

PROVIDER: S-EPMC6336864 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature