Fe-doped MoS2nanosheets array for high-current-density seawater electrolysis

Wei Huang; Dejin Zhou; Gaocan Qi; Xijun Liu

doi:10.1088/1361-6528/ac1195

Fe-doped MoS₂nanosheets array for high-current-density seawater electrolysis

Nanotechnology. 2021 Jul 22;32(41). doi: 10.1088/1361-6528/ac1195.

Authors

Wei Huang¹, Dejin Zhou², Gaocan Qi³, Xijun Liu⁴

Affiliations

¹ State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, People's Republic of China.
² Wuxi Research Institute of Applied Technologies, Tsinghua University, Wuxi 214072, People's Republic of China.
³ School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China.
⁴ Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China.

PMID: 34229303
DOI: 10.1088/1361-6528/ac1195

Abstract

Designing highly active and cost-effective electrocatalysts for seawater-splitting with large current densities is compelling for developing hydrogen energy. Great advancements in hydrogen evolution reaction (HER) have been achieved, but the progress on driving HER in seawater is still limited. Herein, Fe-doped MoS₂nanoshseets array supported by 3D carbon fibers was explored to be an efficient HER electrocatalyst operating in seawater. Strikingly, it exhibited small overpotentials of 119 and 300 mV to reach the current densities of 10 and 250 mA cm^-2in buffered seawater, respectively, both of them are comparable to the best-reported values under similar conditions. Meantime, the catalyst could keep the stable HER activity for 30 h without notable loss. Theoretical calculations revealed that Fe doping increases the S-edge activity. Our work provides a new avenue for designing MoS₂-based HER electrocatalysts for industry application.

Keywords: H2 production; industrial-level; neutral hydrogen evolution; seawater; transition metal doping.