Catalytic electrodes consisting of MmNi(0.58)Co(0.07)Mn(0.04)Al(0.02) (AB(5)-type alloy) and multi-walled carbon nanotubes (MWNTs) are studied for NaBH4 electrooxidation and are characterized by scanning electron microscope and X-ray diffractometer. The NaBH4 electrooxidation performance on the AB(5)/MWNTs electrode is tested by cyclic voltammetry and chronoamperometry methods. The electrode performance is significantly affected by the content of MWNTs and the optimized content of MWNTs is found to be 2 wt.%. The steady state current density for NaBH4 electrooxidation at the AB(5)/MWNTs (2 wt.%) electrode is about twice of that at the AB(5) electrode without MWNTs. The utilization efficiency of NaBH4 at the AB(5)/MWNTs electrode is 61.5% higher than that at the pristine AB(5) electrode. The enhanced electrocatalytic activity and NaBH4 utilization at the AB(5)/MWNTs (2 wt.%) electrode can be attributed to MWNTs, which acts as a hydrogen adsorbent to diminish hydrogen release. (C) 2013 Elsevier B.V. All rights reserved.