Reverse micelle synthesis of AuNi alloy as electrocatalyst of borohydride oxidation

▶ The AuNi/C catalyst is prepared in water-in-oil microemulsion of water/AOT/n-heptane. ▶ The effects of the ratios of water to AOT (Rω) on the particle size are investigated. ▶ The effects of Rω on the catalytic performance are investigated. ▶ The smaller particle size can get a higher catalytic activity. ▶ The highest catalytic activity of the AuNi/C catalyst is obtained at Rω = 5.