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The electroluminescence performance and long‐term stability of perovskite light‐emitting diodes (PeLEDs) are greatly affected by the film quality of perovskite emitting layer. Herein, the authors employ an ionic liquid, 1‐butyl‐3‐methylimidazolium trifluoromethanesulfonate ([BMIm]OTf), to manipulate the growth of quasi‐2D perovskite films by providing heterogeneous nucleation sites. The [BMIm]OTf...
Oxygen evolution reaction (OER) is an obstacle to the electrocatalytic water splitting due to its unique four‐proton‐and‐electron‐transfer reaction process. Many methods, such as engineering heterostructure and introducing oxygen vacancy, have been used to improve the catalytic performance of electrocatalysts for OER. Herein, the above two kinds of regulation are simultaneously realized in a catalyst...
An effective and universal strategy is developed to enhance the stability of the non‐noble‐metal M–Nx/C catalyst in proton exchange membrane fuel cells (PEMFCs) by improving the bonding strength between metal ions and chelating polymers, i.e., poly(acrylic acid) (PAA) homopolymer and poly(acrylic acid–maleic acid) (P(AA‐MA)) copolymer with different AA/MA ratios. Mössbauer spectroscopy and X‐ray absorption...
Exploiting platinum‐group‐metal (PGM)‐free electrocatalysts with remarkable activity and stability toward oxygen reduction reaction (ORR) is of significant importance to the large‐scale commercialization of proton exchange membrane fuel cells (PEMFCs). Here, a high‐performance and anti‐Fenton reaction cobalt–nitrogen–carbon (Co–N–C) catalyst is reported via employing double crosslinking (DC) hydrogel...