Thermally prepared Ti/RhOx electrodes: II H2 evolution in acid solution | Zendy

Mario Campari | Zendy; Ana C. Tavares | Zendy; Sergio Trasatti | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Thermally prepared Ti/RhOx electrodes: II H2 evolution in acid solution

Author(s) -

Mario Campari,

Ana C. Tavares,

Sergio Trasatti

Publication year - 2002

Publication title -

hemijska industrija

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.147

H-Index - 19

eISSN - 2217-7426

pISSN - 0367-598X

DOI - 10.2298/hemind0206231c

Subject(s) - tafel equation , electrode , cyclic voltammetry , thermal decomposition , oxide , chloride , decomposition , materials science , electrochemistry , chemistry , analytical chemistry (journal) , inorganic chemistry , metallurgy , organic chemistry , chromatography

Ti/RhOx electrodes were prepared at 400-600°C by thermal decomposition of Rh chloride. Oxide layers were studied by SEM, cyclic voltammetry and steady-state E-j curves In 0.5 mol dm-3 H2SO4 solution. Voltammetric charge exhibits a maximum at 430°C with fresh electrodes which shifts to 470°C after use for H2 evolution. H2 discharge first produces a decrease in voltammetric charge, then an activation with final settlement to a constant behaviour for "aged" electrodes. H2 evolution on stable RhOx surfaces takes place with 40 mV Tafel slope and a reaction order of 2.5. The fractional reaction order indicates that the surface response to pH is that typical of oxides even for "aged" electrodes. A reaction mechanism is proposed

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research