10.1021/acs.nanolett.9b01843.s001 Xiaolei Yuan Xiaolei Yuan Yong Zhang Yong Zhang Muhan Cao Muhan Cao Tong Zhou Tong Zhou Xiaojing Jiang Xiaojing Jiang Jinxing Chen Jinxing Chen Fenglei Lyu Fenglei Lyu Yong Xu Yong Xu Jun Luo Jun Luo Qiao Zhang Qiao Zhang Yadong Yin Yadong Yin Bi(OH)<sub>3</sub>/PdBi Composite Nanochains as Highly Active and Durable Electrocatalysts for Ethanol Oxidation American Chemical Society 2019 durability Pd nanochain ethanol fuel cells Bi CO ethanol oxidation reaction EOR catalysts mg 2019-06-12 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Bi_OH_sub_3_sub_PdBi_Composite_Nanochains_as_Highly_Active_and_Durable_Electrocatalysts_for_Ethanol_Oxidation/8283755 Developing high-performance electrocatalysts for the ethanol oxidation reaction (EOR) is critical to the commercialization of direct ethanol fuel cells. However, current EOR catalysts suffer from high cost, low activity, and poor durability. Here we report the preparation of PdBi-Bi­(OH)<sub>3</sub> composite nanochains with outstanding EOR activity and durability. The incorporation of Bi can tune the electronic structure and downshift the d-band center of Pd while the surface decoration of Bi­(OH)<sub>3</sub> can facilitate the oxidative removal of CO and other carbonaceous intermediates. As a result, the nanochains manifest an exceptional mass activity (5.30 A mg<sub>Pd</sub><sup>–1</sup>, 4.6-fold higher than that of commercial Pd/C) and outstanding durability (with a retained current density of ∼1.00 A mg<sub>Pd</sub><sup>–1</sup> after operating for 20 000 s). More importantly, the nanochain catalyst can be reactivated, and negligible activity loss has been observed after operating for 200 000 s with periodic reactivation, making it one of the best EOR catalysts.