文献类型：期刊文献

英文题名：Steering CO resistance and catalytic activity of PtRu alloy in methanol oxidation with atomically dispersed Ni

作者：Zhang, Guoqing[1]; Li, Jiankun[1]; Li, Shiyi[1]; Wang, Yixing[1,2]; Lei, Linfeng[1,2]; Zhu, Minghui[1]; Zhuang, Linzhou[1]; Xu, Zhi[1]

机构：[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Suzhou Laboratory, Suzhou, 215000, China

年份：2024

卷号：49

期号：3

起止页码：1083

外文期刊名：New Journal of Chemistry

收录：EI(收录号：20245217581940)

语种：英文

外文关键词：Bioremediation - Catalytic oxidation - Cobalt alloys - Direct ethanol fuel cells (DEFC) - Direct methanol fuel cells (DMFC) - Electrodeposition - Methanol fuels - Nickel alloys - Oxidation resistance

摘要：The effective design and construction of high-performance methanol oxidation reaction (MOR) electrocatalysts are crucial for the advancement of direct methanol fuel cells. However, the active sites of MOR electrocatalysts are prone to poisoning by CO, leading to severely decayed durability. Herein, a Ni-atomically dispersed PtRu alloy catalyst is prepared via electrodeposition on stainless steel mesh (PtRuNi/SS) for CO-resistant MOR. DFT calculations reveal that the PtRu alloy with atomically dispersed Ni could adjust the electronic configuration of Pt and facilitate bond breaking between hydrogen and carbon, decreasing the binding energy of *CO. The calculation results could be clearly verified by the electrochemical attenuated total reflection infrared spectroscopy and CO stripping experiments. Consequently, PtRuNi/SS exhibits a mass activity of 0.95 A mgˉ1Pt for the MOR, which is 1.9 and 4.3 times that of PtRu/SS (0.51 A mgˉ1Pt) and commercial Pt/C (0.22 A mgˉ1Pt), respectively. Moreover, PtRuNi/SS demonstrates promising MOR stability, retaining 86.4% of its current density in comparison with 68.9% for PtRu/SS and 53.8% for Pt/C during accelerated durability tests. The excellent CO resistance even endows PtRuNi with robust activity in the oxidation of other alcohols like ethanol. ? The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2025.