A kind of preparation method of microbial fuel cell cathode catalyst
A technology for fuel cell cathodes and catalysts, applied in biochemical fuel cells, battery electrodes, circuits, etc., can solve the problems of high cost of cathode catalysts and lack of large-scale application, and achieve aerobic reduction catalytic activity, low cost, and high output power Enhanced effect
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[0028] The invention provides a method for preparing a microbial fuel cell cathode catalyst.
[0029] The method includes steps as follows:
[0030] (1) Soak 100g of biomass raw material in distilled water until neutral;
[0031] (2) put the biomass raw material soaked in step (1) into 50ml 0.02mol / L H 3 PO 4 aqueous solution, and placed in a shaker at room temperature to rotate continuously at a speed of 100r / min for 6 hours;
[0032] (3) To the H after continuous rotation in step (2) 3 PO 4 Add 50ml 0.01mol / L CuCl to the aqueous solution 2 aqueous solution, and continue to rotate for 6 hours until H 3 PO 4 Aqueous solution and CuCl 2 The aqueous solution replaces the water molecules in the biomass raw material to obtain the sample;
[0033] (4) freeze the sample obtained in step (3) for 24 hours, and then place it in a freeze dryer at -48°C to dry;
[0034] (5) Place the freeze-dried sample in step (4) in a microwave tube furnace, carbonize for 1 hour under an iner...
Embodiment 1
[0039] a. Activation of biochar: soak 100g bacterial cellulose in distilled water overnight until it becomes neutral, and name it bacterial cellulose (BC).
[0040] b. Preparation of biochar: the sample prepared in step a was placed in a low-temperature refrigerator for 24 hours, and then the frozen sample was dried in a freeze dryer at -48°C. The freeze-dried samples were placed in a microwave tube furnace and 2 It was heated to 320°C at a heating rate of 2°C / min under the protection of . After keeping for 1 hour, the temperature was raised to 800° C. and kept for 1 hour to obtain the prepared biochar material. Its SEM picture is as follows figure 1 shown.
[0041] C. Preparation of the catalyst: Grind the biochar material obtained in step b into a powder for use. Mix the above powdered sample with the polymer Nafion PFSA Polymer Dispersions at a mass ratio of 1:4, and dilute with isopropanol to a paste. The diluted mixture was dispersed in an ultrasonic cleaner with a p...
Embodiment 2
[0043] a. Activation of biochar: Soak 100 g of bacterial cellulose in distilled water overnight until it becomes neutral. The neutral bacterial cellulose obtained above is put into 50ml 0.02mol / L H 3 PO 4 Put it in a beaker of aqueous solution, and at room temperature, place it in a shaker and rotate continuously at 100r / min for 6 hours until H 3 PO 4 The aqueous solution replaced the water molecules in the bacterial cellulose, and the obtained sample was named P-doped bacterial cellulose (P-BC).
[0044] b. Preparation of biochar: the sample prepared in step a was placed in a low-temperature refrigerator for 24 hours, and then the frozen sample was dried in a freeze dryer at -48°C. The freeze-dried samples were placed in a microwave tube furnace and 2 It was heated to 320°C at a heating rate of 2°C / min under the protection of . After keeping for 1 hour, the temperature was raised to 800° C. and kept for 1 hour to obtain the prepared biochar material. The P-BC sample due...
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