Polyoxometalate-encapsulated twenty-nuclear silver-tetrazole nanocage frameworks as highly active electrocatalysts for the hydrogen evolution reaction

Abstract

Two unprecedented polyoxometalate-encapsulated twenty-nuclear silver-tetrazole nanocage frameworks have been synthesized, which exhibit high activity in hydrogen evolution reaction. HUST-100 shows an onset overpotential of 148 mV and a Tafel slope of 82 mV dec⁻¹, and the catalytic current density approaches 10 mA cm⁻² at an overpotential of 234 mV.