Enhanced Stabilization and Effective Utilization of Atomic Hydrogen on Pd-In Nanoparticles in a Flow-through Electrode.

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ID: 39276
2019
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Abstract
Surface-adsorbed active species are intermediates with strong activities in heterogenous catalytic reactions. Effective stabilization of these intermediates is crucial to improve 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 (DFT) 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.
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zhou2019enhancedenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yujun Zhou, Gong Zhang, Qinghua Ji, Wei Zhang, Junyu Zhang, Huijuan Liu, Jiuhui Qu
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Journal Environmental science & technology
Year 2019
DOI
10.1021/acs.est.9b03111
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