Crystalline Ru_0.33Se Nanoparticles‐Decorated TiO₂ Nanotube Arrays for Enhanced Hydrogen Evolution Reaction

Abstract

Nowadays, the state-of-the-art electrocatalysts for hydrogen evolution reaction (HER) are platinum group metals. Nonetheless, Pt-based catalysts show decreased HER activity in alkaline media compared with that in acidic media due to the sluggish dissociation process of H O on the surface of Pt. With a cost 1/25 that of Pt, Ru demonstrates a favorable dissociation kinetics of absorbed H O. Herein, crystalline Ru Se nanoparticles are decorated onto TiO nanotube arrays (TNAs) to fabricate Ru Se @ TNA hybrid for HER. Owing to the large-specific surface area, Ru Se nanoparticles are freely distributed and the particle aggregation is eliminated, providing more active sites. The contracted electron transport pathway rendered by TiO nanotubes and the synergistic effect at the interface significantly improve the charge transfer efficiency in the hybrid catalyst. Compared with Ru Se nanoparticles deposited directly on the Ti foil (Ru Se/Ti) or carbon cloth (Ru Se/CC), Ru Se @ TNA shows an enhanced catalytic activity with an overpotential of 57 mV to afford a current density of 10 mA cm , a Tafel slope of 50.0 mV dec . Furthermore, the hybrid catalyst also exhibits an outstanding catalytic stability. The strategy here opens up a new synthetic avenue to the design of highly efficient hybrid electrocatalysts for hydrogen production.

Electrocatalytic Hydrogen Evolution Reaction Related to Nanochannel Materials

“…c,d) Reproduced with permission. [17] Copyright 2018, Wiley. e) Schematic illustration of 3D-POM-encapsulated MONTs and f ) POM linkage mode in 1D MONT, respectively.…”

Ultrafine Ru nanoclusters supported on N/S doped macroporous carbon spheres for efficient hydrogen evolution reaction

“…4c and Table S3 summarize the key parameters for HER performance of recently reported Ru-based catalysts and commercial Pt/C for comparison. 12,17,26,29,[33][34][35][36][37][38][39][40][41][42] Among Pt/C and various Ru-based catalysts, the Ru/H-S, N-C exhibits relatively higher HER activity. For lucubrating the electrochemical behavior of Ru/H-N-C, H-S, N-C, and Ru/H-S, N-C, electrochemical double-layer capacitance (C dl ) with positive correction to electrochemical active surface area (ECSA) were evaluated.…”

Benchmarking Phases of Ruthenium Dichalcogenides for Electrocatalysis of Hydrogen Evolution: Theoretical and Experimental Insights

“…Very recently, Ru-based electrocatalysts have been extensively explored because of their Pt-like hydrogen binding strength and their good corrosion resistance in both acidic and alkaline media. [26][27][28][29][30][31][32] Most importantly, Ru is the least expensive platinum-group element. Yet, much less attention has been focused on ruthenium dichalcogenides (RuX 2 , X = S, Se, Te) for the HER.…”