Abstract
Electrochemical water splitting stands out as an environmentally benign approach for generating green H2 through the harnessing of intermittent energy derived from renewable sources. However, the slow water dissociation kinetics hinders the commercialization for water-alkali electrolyzer. In this study, we synthesize a novel porous nanocomposite (RuP2/WP/PNC3-A) combined with RuP2 and amorphous WP by a facile and eco-friendly strategy. Detailed research results demonstrate that biomass-derived phytic acid not only promotes the formation of active metal phosphides, but also serves as a pore-forming agent to assist in the constructing a hierarchical porous structure, significantly enhancing the mass and electron transfer capability. Particularly noteworthy is that WP prevents the aggregation of RuP2. During the post-treatment process more protected RuP2 components are released and meanwhile leads to the conversion of WP from crystalline to amorphous. Benefitting from the applicable H adsorption ability of RuP2 and the enhanced H2O adsorption, dissociation capacity by amorphous WP, RuP2/WP/PNC3-A exhibits astonishing hydrogen evolution reaction (HER) performance, requiring an exceedingly low overpotential (only 24 mV) under 10 mA cm−2, featuring small Tafel slope (64.6 mV dec−1), and demonstrating excellent durability.
Published Version
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