Abstract: A platinum-carbon catalyst, a preparation method therefor and an application thereof are provided. Among N1s spectral peaks of the XPS analysis of the platinum-carbon catalyst, except for the presence of characteristic peaks between 399 ev and 400.5 ev, there are no other characteristic peaks between 395 ev and 405 ev; and a carrier of the platinum-carbon catalyst is nitrogen doped conductive carbon black. The carrier conductive carbon black of the platinum-carbon catalyst is modified, and by means of controlling the doping form of a doping element, the mass specific activity and electrochemical area of the platinum-carbon catalyst are significantly improved; further, the stability of the platinum-carbon catalyst and the ability to resist carbon corrosion may also be improved. A method for preparing the platinum-carbon catalyst is also provided.

Abstract: A platinum-on-carbon catalyst, a preparation method therefor and the use thereof are provided. Among S2P spectral peaks thereof analyzed by means of XPS between 160 eV and 170 eV, the area of characteristic peaks (preferably a characteristic peak of thiophenic sulfur) located between 162 eV and 166 eV is more than 92%, or more than 95%, or more than 98%, or even only the characteristic peaks (preferably the characteristic peak of thiophenic sulfur) located between 162 eV and 166 eV. A carrier of the platinum-on-carbon catalyst is sulfur-doped conductive carbon black. The carrier of the platinum-on-carbon catalyst, i.e. conductive carbon black, is modified, and by controlling the doping form of the doping element, the mass specific activity and the electrochemical active area of the platinum-on-carbon catalyst are significantly improved. The stability and carbon corrosion resistance of the platinum-on-carbon catalyst can also be improved.

Abstract: A foldable table has a plastics table plate, a hoop-shaped frame, four corner seats disposed on four corners of the hoop-shaped frame, and four leg tubes. Each leg tube is disposed on the corresponding corner seat. A center panel is disposed on the plastics table plate. The plastics table plate has a periphery flange and a periphery channel. Four square blocks are disposed on four corners of the plastics table plate. Each corner seat has a groove and an elastic blocking angle bar. At least a connection bar is connected to the corresponding corner seat and the corresponding leg tube. At least a connection plate is connected to the corresponding elastic blocking angle bar and the corresponding leg tube. The hoop-shaped frame is inserted in the plastics table plate. Each square block is inserted in the corresponding groove of the corner seat.

Abstract: A foldable table has a plastics table plate, a hoop-shaped frame, four corner seats disposed on four corners of the hoop-shaped frame, and four leg tubes. Each leg tube is disposed on the corresponding corner seat. A center panel is disposed on the plastics table plate. The plastics table plate has a periphery flange and a periphery channel. Four square blocks are disposed on four corners of the plastics table plate. Each corner seat has a groove and an elastic blocking angle bar. At least a connection bar is connected to the corresponding corner seat and the corresponding leg tube. At least a connection plate is connected to the corresponding elastic blocking angle bar and the corresponding leg tube. The hoop-shaped frame is inserted in the plastics table plate. Each square block is inserted in the corresponding groove of the corner seat.