Phys.org  November 29, 2022 Platinum on carbon (Pt/C) catalyst is commercially adopted in fuel cells but it undergoes active-site poisoning by carbon monoxide (CO) diminishing the device performances. Researchers in China incorporated cobalt (Co) into molybdenum-nickel alloy (MoNi4), termed Co-MoNi4, which not only shows superior hydrogen oxidation reaction activity over the Pt/C catalyst in alkali, but exhibits excellent CO tolerance with only small activity decay after 10 000 cycles. It yielded peak power density far exceeding the Pt/C catalyst. Experimental and computational studies revealed that weakened CO chemisorption originates from the electron-deficient Ni sites… read more. TECHNICAL ARTICLE