Electrocatalytic hydrogen evolution with gallium hydride and ligand-centered reduction.

ABSTRACT: Ga^III chloride tetrakis(pentafluorophenyl)porphyrin (1) was synthesized and shown to be a highly active and stable post-transition metal-based electrocatalyst for the hydrogen evolution reaction (HER). Electrochemical and spectroscopic studies indicate that both the first and second reduction events of 1 are ligand-centered. The 2e-reduced form 1 ^2- reacts with a proton to give Ga^III-H species (1-H), which undergoes protonolysis with Brønsted acids to produce H₂. The identification of key intermediates 1 ^-, 1 ^2-, and 1-H leads to a catalytic cycle, which is valuable for the fundamental understanding of the HER. This study presents a rare but highly active HER electrocatalyst w

SUBMITTER: Wang N 

PROVIDER: S-EPMC6385664 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature