Proton conductive Pt-Co nanoparticles anchoring on citric acid functionalized graphene for efficient oxygen reduction reaction

Construction and Regulation of a Surface Protophilic Environment to Enhance Oxygen Reduction Reaction Electrocatalytic Activity

“…Peaks at 3432, 1590, and 1258 cm −1 are assignable to the stretching vibration of the N−H bond, CC stretching of quinonoid rings, and the stretching vibration of the C−N bond on the benzene rings, sequentially. 31 Combining the above results, we can confirm the presence of PANI in the samples. The catalytic activity toward ORR is evaluated in an acidic solution by the rotating disk electrode (RDE) and RRDE.…”

“…The FT-IR spectra of Fe-Czif-8- x PANI catalysts (Figure S6) show main absorption peaks of PANI. Peaks at 3432, 1590, and 1258 cm –1 are assignable to the stretching vibration of the N–H bond, CC stretching of quinonoid rings, and the stretching vibration of the C–N bond on the benzene rings, sequentially . Combining the above results, we can confirm the presence of PANI in the samples.…”

Effective Removal of Basic Red 46 with Ti3C2 Powder Modified with Citric acid

“…[23] The infrared spectra for CA-Alk-TC-4, CA-Alk-TC-6, CA-Alk-TC-8 all showed the tensile vibration of -CH 2 at 2900 cm À 1 , the peak becoming stronger as the compound ratio increasing. The peak of 1620 cm À 1 was attributed to the C=O asymmetric stretching vibration peak [24] in the immobilized citric acid and that of 1030 cm À 1 was ascribed to C-OH [25] where CA-Alk-TC-8 had the strongest peak because it contained the most functional groups among three modified materials due to the lower the transmittance, the stronger the peak. In addition, there was a peak around 500 cm À 1 , which was mainly the TiÀ O bond from MXene.…”

Recent Advances and Prospects of Metal‐Based Catalysts for Oxygen Reduction Reaction

“…The activity of the Pt catalyst is improved by rational selection of the metal to control the particle size, composition, and internal structure of the catalyst. [29][30][31][32][33][34] 2) The surface of the Pt nanoparticles is modified by metal clusters, molecules, ions, organic, or inorganic compounds. In addition to improving its catalytic performance, this functional modification can also have certain properties such as hydrophilicity and electronic properties.…”

“…At present, there are mainly four ways to improve the surface electronic properties of Pt catalysts: 1) They can be improved by the formation of alloy structures, core–shell structures, network structures or heterostructured polymetallic nanocrystals of Pt with other metals, or the regulation of composite metals. The activity of the Pt catalyst is improved by rational selection of the metal to control the particle size, composition, and internal structure of the catalyst . 2) The surface of the Pt nanoparticles is modified by metal clusters, molecules, ions, organic, or inorganic compounds.…”