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Synthesis of a MoSx–O–PtOx Electrocatalyst with High Hydrogen Evolution Activity Using a Sacrificial Counter‐Electrode
Water splitting is considered to be a very promising alternative to greenly produce hydrogen, and the key to optimizing this process is the development of suitable electrocatalysts. Here, a sacrificial‐counter‐electrode method to synthesize a MoSx/carbon nanotubes/Pt catalyst (0.55 wt% Pt loading) is developed, which exhibits a low overpotential of 25 mV at a current density of 10 mA cm−2, a low Tafel slope of 27 mV dec−1, and excellent stability under acidic conditions. The theory calculations and experimental results confirm the high hydrogen evolution activity that is likely due to the fact that the S atoms in MoSx can be substituted with O atoms during a potential cycling process when using Pt as a counter‐electrode, where the O atoms act as bridges between the catalytic PtOx particles and the MoSx support to generate a MoSx–O–PtOx structure, allowing the Pt atoms to donate more electrons thus facilitating the hydrogen evolution reaction process.
Synthesis of a MoSx–O–PtOx Electrocatalyst with High Hydrogen Evolution Activity Using a Sacrificial Counter‐Electrode
Water splitting is considered to be a very promising alternative to greenly produce hydrogen, and the key to optimizing this process is the development of suitable electrocatalysts. Here, a sacrificial‐counter‐electrode method to synthesize a MoSx/carbon nanotubes/Pt catalyst (0.55 wt% Pt loading) is developed, which exhibits a low overpotential of 25 mV at a current density of 10 mA cm−2, a low Tafel slope of 27 mV dec−1, and excellent stability under acidic conditions. The theory calculations and experimental results confirm the high hydrogen evolution activity that is likely due to the fact that the S atoms in MoSx can be substituted with O atoms during a potential cycling process when using Pt as a counter‐electrode, where the O atoms act as bridges between the catalytic PtOx particles and the MoSx support to generate a MoSx–O–PtOx structure, allowing the Pt atoms to donate more electrons thus facilitating the hydrogen evolution reaction process.
Synthesis of a MoSx–O–PtOx Electrocatalyst with High Hydrogen Evolution Activity Using a Sacrificial Counter‐Electrode
Zhan, Yingxin (author) / Li, Yi (author) / Yang, Zhi (author) / Wu, Xiongwei (author) / Ge, Mengzhan (author) / Zhou, Xuemei (author) / Hou, Junjie (author) / Zheng, Xiannuo (author) / Lai, Yuchong (author) / Pang, Rongrong (author)
Advanced Science ; 6
2019-03-01
10 pages
Article (Journal)
Electronic Resource
English
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