双金属片
催化作用
化学
溴酸盐
纳米颗粒
吸附
反应速率常数
可逆氢电极
动力学
化学工程
无机化学
钯
电极
光化学
纳米技术
溴化物
材料科学
物理化学
有机化学
工作电极
电化学
物理
工程类
量子力学
作者
Yiqiang Zhou,Gong Zhang,Qinghua Ji,Wei Zhang,Junyu Zhang,Huijuan Liu,Jiuhui Qu
标识
DOI:10.1021/acs.est.9b03111
摘要
Surface-adsorbed active species are intermediates with strong activities in heterogeneous catalytic reactions. Effective stabilization of these intermediates is crucial to improve the catalytic performance. Here, we demonstrated highly active bimetallic palladium–indium (Pd–In) nanoparticles (NPs) that can stabilize atomic H* on the surface and show efficient electrocatalytic reduction performance toward bromate. The optimal atomic ratio of Pd to In was investigated with the aim of efficient formation and strong stabilization of H*, thus facilitating the reduction and decontamination of carcinogenic bromate. Pd2In3 was the most active catalyst, with a high rate constant of 0.029 min–1, whereas the rate constant for monometallic Pd NPs was only 0.009 min–1. Density functional theory calculations suggest that Pd2In3 NPs decrease the work function and provide strong H* stabilization ability. By employing a flow-through electrode coated with Pd2In3 NPs to enhance the mass transport, the utilization of H* could be boosted and the reduction kinetics increased up to 7.5 times.
科研通智能强力驱动
Strongly Powered by AbleSci AI