In this section, you can access to the latest technical information related to the FUTURE project topic.

Dynamic anion regulation to construct S-doped FeOOH realizing 1000?mA?cm?2?level?current?density oxygen evolution over 1000?h

Iron oxyhydroxide (FeOOH) as the real active species of Fe-based electrocatalysts holds great promise in industrial water electrolysis. However, the poor conductivity and OER kinetics hinder its catalytic performance. Herein, we have developed a facile dynamic anion regulation strategy to enhance OER activity of FeOOH. Of the seven common anions (VO33-, MoO42-, WO42-, S2-, H2PO4-, H2PO2- and F-), S2- was found to have the best regulatory effect. The obtained 0.01 S-FeOOH+1000/IF exhibits industrial-level OER current output of 1000?mA?cm?2 with low overpotential of 358?mV. Importantly, this catalyst can operate stably at 1000?mA?cm?2 for at least 1000?h. Theoretical calculation reveals that the doping of sulfur can drastically lower the energy barrier of rate-determining step during OER. Meanwhile, 0.01 S-FeOOH+1000/IF in alkaline anion exchange membrane (AEM) cells demonstrates a stable cell voltage of 2.12?V to reach 1000?mA?cm?2 over 24?h.

» Author: Xin-Yu Zhang, Feng-Ting Li, Yi-Wen Dong, Bin Dong, Fang-Na Dai, Chen-Guang Liu, Yong-Ming Chai

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