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磁场对核壳型颗粒催化性能的影响

The Effect of Magnetic Field on Catalytic Properties in Core-Shell Type Particles.

作者信息

Westsson Emma, Picken Stephen, Koper Ger

机构信息

Department of Chemical Engineering, Delft University of Technology, Delft, Netherlands.

出版信息

Front Chem. 2020 Mar 12;8:163. doi: 10.3389/fchem.2020.00163. eCollection 2020.

DOI:10.3389/fchem.2020.00163
PMID:32232025
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7082754/
Abstract

Magnetic field effects can provide a handle on steering chemical reactions and manipulating yields. The presence of a magnetic field can influence the energy levels of the active species by interacting with their spin states. Here we demonstrate the effect of a magnetic field on the electrocatalytic processes taking place on platinum-based nanoparticles in fuel cell conditions. We have identified a shift in the potentials representing hydrogen adsorption and desorption, present in all measurements recorded in the presence of a magnetic field. We argue that the changes in electrochemical behavior are a result of the interactions between the magnetic field and the unpaired spin states of hydrogen.

摘要

磁场效应可为控制化学反应和操纵产率提供一种手段。磁场的存在可通过与活性物种的自旋态相互作用来影响其能级。在此，我们展示了磁场对在燃料电池条件下铂基纳米颗粒上发生的电催化过程的影响。我们发现在存在磁场的情况下记录的所有测量中，代表氢吸附和解吸的电位发生了偏移。我们认为电化学行为的变化是磁场与氢的未配对自旋态之间相互作用的结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/cdc32210942c/fchem-08-00163-g0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/978e9f59b317/fchem-08-00163-g0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/f78ea5cd714f/fchem-08-00163-g0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/6879fb1ebdcf/fchem-08-00163-g0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/644756b4bc30/fchem-08-00163-g0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/dfdb141f0cbb/fchem-08-00163-g0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/e3fef310e7c4/fchem-08-00163-g0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/b7d8cf291d5d/fchem-08-00163-g0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/33893bbced3d/fchem-08-00163-g0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/cdc32210942c/fchem-08-00163-g0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/978e9f59b317/fchem-08-00163-g0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/f78ea5cd714f/fchem-08-00163-g0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/6879fb1ebdcf/fchem-08-00163-g0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/644756b4bc30/fchem-08-00163-g0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/dfdb141f0cbb/fchem-08-00163-g0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/e3fef310e7c4/fchem-08-00163-g0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/b7d8cf291d5d/fchem-08-00163-g0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/33893bbced3d/fchem-08-00163-g0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a08e/7082754/cdc32210942c/fchem-08-00163-g0008.jpg

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Understanding Catalytic Activity Trends in the Oxygen Reduction Reaction.理解氧还原反应中的催化活性趋势。
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