High Durability and Electrocatalytic Activity Toward Hydrogen Evolution Reaction with Ultralow Rhodium Loading on Titania

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AKBAYRAK M., ÖNAL A. M.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol.167, no.15, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 167 Issue: 15
  • Publication Date: 2020
  • Doi Number: 10.1149/1945-7111/abb9cf
  • Journal Name: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Analytical Abstracts, Applied Science & Technology Source, Chimica, Compendex, Computer & Applied Sciences, INSPEC
  • Keywords: Rhodium nanoparticles, Titania, Electrocatalyst, Hydrogen evolution reaction, water splitting, EFFICIENT ELECTROCATALYST, FACILE SYNTHESIS, NANOPARTICLES, CATALYSTS, PERFORMANCE, PLATINUM, TRANSITION, ELECTRODES, SHELL
  • Middle East Technical University Affiliated: Yes

Abstract

Herein, we report the synthesis of titania supported Rh(0) nanoparticles (Rh-0/TiO2) as electrocatalyst for hydrogen evolution reaction (HER) in acidic medium. Rhodium nanoparticles with an average particle size of 2.54 nm are found to be well-dispersed on TiO(2)surface. Rh-0/TiO(2)with very low loading density (3.79 mu g cm(-2)) was attached on the glassy carbon electrode (GCE) by drop-casting method. Electrocatalytic performance of modified GCE was investigated via linear sweep voltammetry (LSV) in 0.5 M aqueous H(2)SO(4)solution after 2000 cycle treatment (Rh-0/TiO2-2000) and it was found that Rh-0/TiO2-2000 on GCE exhibits superior electrocatalytic activity (TOF: 11.45 s(-1)at eta= 100 mV,eta(0):-28 mV,eta(-2)(10 mA cm): -37 mV, j(0): 0.686 mA cm(-2)and Tafel slope: 32 Mv dec(-1)). More importantly, it provides outstanding long-term stability (10000 cycles) at room temperature for HER, which makes Rh-0/TiO2-2000 a promising electrocatalyst for hydrogen generation.