Enhancing Hydrogen Evolution Reaction via Synergistic Interaction between the [Mo3S13]2– Cluster Co-Catalyst and WSe2 Photocathode
| Autor: | Fanxing Xi, Farabi Bozheyev, Xiaoyu Han, Marin Rusu, Jörg Rappich, Fatwa F. Abdi, Peter Bogdanoff, Nikolas Kaltsoyannis, Sebastian Fiechter |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | ACS Applied Materials & Interfaces. 14:52815-52824 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | A thiomolybdate [Mo3S13]2 nanocluster is a promising catalyst for hydrogen evolution reaction HER due to the high number of active edge sites. In this work, thiomolybdate cluster films are prepared by spin coating of a NH4 2Mo3S13 solution both on FTO glass substrates as hydrogen evolving electrodes and on highly 00.1 textured WSe2 for photoelectrochemical water splitting. As an electrocatalyst, [Mo3S13]2 clusters demonstrate a low overpotential of 220 mV at 10 mA cm 2 in 0.5 M H2SO4 electrolyte pH 0.3 and remain structurally stable during the electrochemical cycling as revealed by in situ Raman spectroscopy. Moreover, as a co catalyst on WSe2, [Mo3S13]2 clusters enhance the photocurrent substantially by more than two orders of magnitude from 0.02 to 2.8 mA cm 2 at 0 V vs RHE . The synergistic interactions between the photoelectrode and catalyst, i.e., surface passivation and band bending modification by the [Mo3S13]2 cluster film, promoted HER catalytic activity of [Mo3S13]2 clusters influenced by the WSe2 support, are revealed by intensity modulated photocurrent spectroscopy and density functional theory calculations, respectively. The band alignment of the WSe2 [Mo3S13]2 heterojunction, which facilitates the electron injection, is determined by correlating UV vis with photoelectron yield spectroscopy results |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|