Details

Autor(en) / Beteiligte

• Li, Hong-Cheng
• Ji, Peng-Cheng
• Teng, Yang
• Jia, Hai-Lang
• Guan, Ming-Yun

Titel

Preparation of carbon coated hyperdispersed Ru nanoparticles supported on TiO HER electrocatalysts by dye-sensitization

Ist Teil von

• New journal of chemistry, 2023-05, Vol.47 (2), p.9628-9634

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Hydrogen production by water-splitting is a very promising strategic energy technology and one of the most important means to obtain green hydrogen. It is of great practical significance to develop cheap and efficient electrocatalysts to replace Pt. Herein, we use the dye-sensitization strategy to load hyperdispersed Ru nanoparticles on the TiO 2 surface, and then use cheap glucose for carbon coating to improve the conductivity of the material, so as to obtain an efficient HER catalyst C/Ru/TiO 2 . On the one hand, dye molecules can be firmly bonded to the surface of TiO 2 through carboxyl groups, and on the other hand, their large steric effect can effectively inhibit the aggregation of molecules, so ruthenium nanoparticles formed after pyrolysis can be uniformly distributed on the surface of TiO 2 . Carbon coating also effectively solves the problem of poor conductivity of TiO 2 as a support. C/Ru/TiO 2 shows excellent catalytic performance for HER. In 0.5 M H 2 SO 4 , the overpotential is 69 mV at 10 mA cm −2 and the Tafel slope is only 70 mV dec −1 . In 1 M KOH, the overpotential is only 51 mV at 10 mA cm −2 and the Tafel slope is only 68 mV dec −1 . The dye-sensitization strategy makes it easy to realize the loading of hyperdisperse metal nanoparticles on the support surface. A good HER catalyst C/Ru/TiO 2 was prepared by the dye-sensitization method, Ru nanoparticles were uniformly loaded on TiO 2 , and the catalytic performance was further improved by carbon coating technology.