Ru doped CoP nanosheets for efficient hydrogen evolution in microbial electrolysis cells

作者：Dai, Ling; Jia, Chunguang; Liu, Bowen; Wen, Zhenhai^*; Li, Kangkang; Ci, Suqin^*

来源：Sustainable Energy & Fuels, 2022, 6(21): 4982-4990.

DOI：10.1039/d2se01019d

• PHOTOCATALYTIC HYDROGEN
• ELECTROCATALYSTS
• CATALYSTS
• PH
• NANOPARTICLES
• COCATALYST

Microbial electrolysis cells (MECs) are an emerging hydrogen production technology that can potentially purify wastewater at the anode and simultaneously produce hydrogen at the cathode. Development of low-cost and high-efficiency catalysts toward the cathodic hydrogen evolution reaction (HER) is crucial to realize the practical application of MECs for hydrogen production. In this work, ruthenium-doped cobalt phosphide nanosheets (Ru/CoP NSs) are prepared for the HER in alkaline solution (1 M KOH) and neutral phosphate buffered solution (1 M PBS) with impressive over potentials of 38 mV and 148 mV at 10 mA cm(-2), respectively. The MECs are set up by coupling a microbial anode with a Ru/CoP NS cathode which enables an electrolytic current density of similar to 16.74 A m(-2) at an applied voltage of 0.8 V, with a hydrogen production rate (Q(H2)) is 0.1434 +/- 0.0082 m(3) m(-2) d(-1). Notably, the MECs with Ru/CoP NS catalysts (Ru/CoP NSs-MEC) outperform the MECs with the commercial Pt/C catalysts (Pt/C-MECs), indicating the potential of Ru/CoP NSs to replace Pt for practical H-2 production in MEC applications.

• 单位
  中国科学院; 北京大学; 中国科学院福建物质结构研究所; 南昌航空大学