Application of Ni-based catalyst in anode of direct borohydride fuel cell

Abstract

The invention provides application of a Ni-based catalyst in an anode of a direct borohydride fuel cell. Active components of the catalyst consist of Ni and one or more metal elements in I B and VIIIB groups; the atomic ratio of the Ni to other metal active components in the catalyst is 99:1-8:1; and the active components in the catalyst account for 5 to 80 percent and the balance is a C carrier.A small amount of one or more metal elements in the I B and VIII B groups are added into the Ni-based catalyst to obviously improve the stability and activity of the catalyst; and when the catalyst is used as a catalyst for the anode of the direct borohydride fuel cell, the direct borohydride fuel cell shows excellent performance.

Description

technical field [0001] The invention relates to a direct borohydride fuel cell catalyst, in particular to the application of a supported Ni-based binary or binary or higher catalyst in a direct borohydride fuel cell anode. Background technique [0002] A fuel cell (FC) is an energy conversion device that directly converts the chemical energy stored in fuel and oxidant into electrical energy according to the electrochemical principle. Because it does not go through the heat engine process, it is not limited by the Carnot cycle, has high energy conversion efficiency, is environmentally friendly, and hardly emits harmful substances such as nitrogen oxides and sulfur oxides. Therefore, it plays a very important role in improving the utilization rate of energy and improving the existing human living environment. Direct borohydride fuel cell (DBFC) is a power generation device that directly converts the chemical energy of borohydride oxidation reaction into electrical energy. In ...

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Problems solved by technology

[0009] Liu et al. (Electrochimica Acta 50 (2005) 3719-3725) used the 210-type nickel powder of International Nickel Industry Co., Ltd. as the anode catalyst of the miniature direct borohydride fuel cell. Under normal temperature and pressure air conditions, the highest power density can reach 40mw cm -2 , but the particle size of the catalyst they used was relatively large (0.5~1μm), and at the same time, the loading amount of the catalyst was very large (≥100mg cm -2 ), leading to a lower mass specific activity of the catalyst

[0010] In order to improve the mass specific activity of the catalyst, Cheng et al. (Fuel cells 06 (2006) 367-375) prepared a supported Ni / C catalyst by impregnation method and used it in the anode of DBFC, but the results showed that the prepared Ni / C C catalyst is less stable

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