Polyimide, a famous organic polymer widely used as insulated electronics coating, is found to perform excellent electrochemical catalytic activity in water splitting and N2 fixation. Our exciting results are introduced as following two parts:
1. The exploitation of metal-free organic polymers as electrodes for water splitting reactions is limited by their presumably low activity and poor stability, especially for the oxygen evolution reaction (OER) under more critical conditions. Now, the thickness of a cheap and robust polymer, poly(p-phenylene pyromellitimide) (PPPI) was rationally engineered by an in situ polymerization method to make the metal-free polymer available for the first time as flexible, tailorable, efficient, and ultra-stable electrodes for water oxidation over a wide pH range.
2. Electrochemical N2 fixation under ambient conditions is recognized as a promising green substitution in the near future to replace the high pressure-high temperature Haber–Bosch process. We boost the N2 reduction reaction (NRR) catalytic activity of Cu nanoparticles, which originally exhibited negligible NRR activity, via a local electron depletion effect. The electron-deficient Cu nanoparticles are brought in a Schottky rectifying contact with a polyimide (PI) support which retards the hydrogen evolution reaction (HER) process in basic electrolytes and facilitates the N2fixation to afford the electrochemical NRR process under ambient aqueous conditions.
1. Yun-Xiao Lin, Wei-Jie Feng et al. Angew. Chem. Int. Ed. 2018, 57, 12563-12566.
2. Yun-Xiao Lin, Shi-Nan Zhang et al. Nature Communications 2019, 10, 4380.

Polyimide-Based Electrocatalysis for Efficient O2 and NH3 Production

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